JP7763458B2 - Pumps and pump-type products - Google Patents

Description

The present invention relates to a pump for a pump-type product and to a pump-type product.

A known pump in a conventional pump-type product is one that includes a cylinder with a first cylinder portion and a second cylinder portion attached to the first cylinder portion, and a metal part disposed inside the cylinder (see, for example, Patent Document 1). In the pump described in Patent Document 1, the first cylinder portion and the second cylinder portion can be separated from each other, allowing the metal part to be removed from inside the cylinder itself.

Japanese Patent Application Laid-Open No. 2004-337654

However, in the pump described in Patent Document 1, the first and second cylinder sections are separated from each other by the cylinder breaking at the thin-walled section formed between them. This presents a problem in that it is not easy to design the thin-walled section so that it will not be broken and the first and second cylinder sections separated from each other by external forces in the extension direction of the cylinder, such as the biasing force of a spring inside the cylinder, during normal use.

The present invention therefore aims to provide a pump and pump-type product that reduces the likelihood of the first and second cylinder portions becoming separated from each other during normal use.

The pump of the present invention is a pump for a pump-type product, comprising a cylinder and a metal part disposed inside the cylinder, the cylinder comprising a first cylinder portion and a second cylinder portion attached to the first cylinder portion, the first cylinder portion and the second cylinder portion being separated so that the part can be removed from inside the cylinder itself, the first cylinder portion comprising a first cylinder movement prevention portion that contacts the second cylinder portion to prevent the first cylinder portion from moving relative to the second cylinder portion in the direction in which the first cylinder portion moves away from the second cylinder portion in the extension direction of the cylinder, and the second cylinder The cylinder section includes a second cylinder movement prevention part that contacts the first cylinder movement prevention part to prevent the second cylinder section from moving relative to the first cylinder section in the extension direction in a direction in which the second cylinder section moves away from the first cylinder section, and the first cylinder movement prevention part and the second cylinder movement prevention part extend in a direction perpendicular to the extension direction, and the first cylinder section and the second cylinder section are rotated relative to each other in a rotational direction around an axis extending in the extension direction, thereby releasing the contact between the first cylinder movement prevention part and the second cylinder movement prevention part and making them separable from each other.

With this configuration, the pump of the present invention has the first cylinder movement prevention part and the second cylinder movement prevention part extending in a direction perpendicular to the extension direction of the cylinder, and by rotating one of the first cylinder part and the second cylinder part relative to the other in a direction of rotation centered on an axis extending in the extension direction of the cylinder, the first cylinder movement prevention part and the second cylinder movement prevention part are released from contact, allowing the first cylinder part and the second cylinder part to be separated from each other. This reduces the possibility of the first cylinder part and the second cylinder part being separated from each other by external forces in the extension direction of the cylinder, such as the biasing force of a spring inside the cylinder, during normal use.

In the pump of the present invention, the first cylinder portion has a first cylinder first rotation direction rotation prevention portion at its end in a second rotation direction opposite to the first rotation direction, which prevents rotation of the second cylinder portion relative to the first cylinder portion in a first rotation direction by contacting the second cylinder portion, and has a convex portion to be climbed over on its outer surface when one of the first and second cylinder portions is rotated in the rotation direction relative to the other of the first and second cylinder portions; the first cylinder portion has a first cylinder second rotation direction rotation prevention portion that prevents rotation of the second cylinder portion relative to the first cylinder portion in the second rotation direction by contacting the second cylinder portion; and the second cylinder portion has a second cylinder first rotation direction rotation prevention portion at its end in the first rotation direction, which prevents rotation of the second cylinder portion relative to the first cylinder portion in the first rotation direction by contacting the first cylinder first rotation direction rotation prevention portion, and when the other of the first and second cylinder portions is rotated in the rotation direction relative to the other of the first and second cylinder portions, the convex portion to be climbed over the second cylinder portion may have, on its inner circumferential surface, a protruding portion for overcoming the second cylinder portion relative to the first cylinder portion in the second rotational direction by contacting the first cylinder second rotational direction rotation preventing portion; the first cylinder portion and the second cylinder portion may be positioned in a locked position where, after the overcoming protruding portion overcomes the to-be-overcome protruding portion by rotating the second cylinder portion in the second rotational direction relative to the first cylinder portion, the first cylinder movement preventing portion and the second cylinder movement preventing portion face each other, the first cylinder first rotational direction rotation preventing portion and the second cylinder first rotational direction rotation preventing portion face each other, and the first cylinder second rotational direction rotation preventing portion and the second cylinder second rotational direction rotation preventing portion face each other; and the first cylinder portion and the second cylinder portion may be positioned in an unlocked position where the overcoming protruding portion overcomes the to-be-overcome protruding portion by rotating the second cylinder portion in the first rotational direction relative to the first cylinder portion from the locked position.

With this configuration, the pump of the present invention rotates the second cylinder portion relative to the first cylinder portion in the second rotational direction, causing the overriding convex portion to climb over the overcome convex portion, and then the first and second cylinder portions are positioned in the locked position, thereby reducing the possibility of the first and second cylinder portions becoming separated from each other during normal use.

In the pump of the present invention, the length of the convex portion to be overcome in the rotational direction may be shorter than the length of the first cylinder movement prevention portion in the rotational direction, and/or the length of the convex portion to overcome in the rotational direction may be shorter than the length of the second cylinder movement prevention portion in the rotational direction.

With this configuration, in the pump of the present invention, when the length of the convex portion to be climbed over in the rotational direction is shorter than the length of the first cylinder movement prevention portion in the rotational direction, even if the length of the first cylinder movement prevention portion in the rotational direction is increased to reduce the possibility of the first cylinder portion and the second cylinder portion separating in the direction of extension of the cylinder when the first cylinder portion and the second cylinder portion are positioned in the locked position, the climbing convex portion can more easily climb over the climbing convex portion compared to a configuration in which the length of the convex portion to be climbed over in the rotational direction is equal to or greater than the length of the first cylinder movement prevention portion in the rotational direction, thereby simplifying the task of the operator of placing the first cylinder portion and the second cylinder portion in the locked position or the unlocked position. Furthermore, in the pump of the present invention, when the length of the climbing convex portion in the rotational direction is shorter than the length of the second cylinder movement prevention portion in the rotational direction, even if the length of the second cylinder movement prevention portion in the rotational direction is increased to reduce the possibility of the first cylinder portion and the second cylinder portion separating in the direction of extension of the cylinder when the first cylinder portion and the second cylinder portion are positioned in the locked position, the climbing convex portion can more easily climb over the to-be-climbed convex portion compared to a configuration in which the length of the climbing convex portion in the rotational direction is equal to or greater than the length of the second cylinder movement prevention portion in the rotational direction, thereby simplifying the task of the operator of placing the first cylinder portion and the second cylinder portion in the locked position and the unlocked position.

In the pump of the present invention, at least one of the convex portion to be climbed over and the convex portion for climbing over may be a portion that breaks when the first cylinder portion and the second cylinder portion are positioned in the locked position and then in the unlocked position.

With this configuration, when the first and second cylinder sections are placed in the locked and unlocked positions, the pump of the present invention allows a worker assembling the cylinders to determine, based on the condition of the convex portion to be climbed over, whether the first cylinder section has previously been placed in the locked and unlocked positions if the convex portion to be climbed over breaks. Furthermore, when the first and second cylinder sections are placed in the locked and unlocked positions, the pump of the present invention allows a worker assembling the cylinders to determine, based on the condition of the convex portion to be climbed over, whether the second cylinder section has previously been placed in the locked and unlocked positions if the convex portion to be climbed over breaks.

In the pump of the present invention, the first cylinder portion and the second cylinder portion may be provided with a mark indicating the unlocked position.

With this configuration, the pump of the present invention has markers on the first and second cylinder sections that indicate the unlocked position, allowing the operator separating the first and second cylinder sections to easily place the first and second cylinder sections in the unlocked position based on the markers, thereby facilitating the separation of the first and second cylinder sections.

In the pump of the present invention, at least one of the first and second cylinder sections may be provided with a knob for an operator to place their fingers on when rotating one of the first and second cylinder sections relative to the other in the rotational direction.

With this configuration, the pump of the present invention has a knob on at least one of the first and second cylinder sections that can be hooked with the fingers of an operator who rotates one of the first and second cylinder sections relative to the other, facilitating the operation of rotating the other of the first and second cylinder sections relative to the other, and as a result, facilitating the operation of separating the first and second cylinder sections.

The pump-type product of the present invention is characterized by including the pump described above.

This configuration of the pump-type product of the present invention reduces the likelihood that the first and second cylinder portions will become separated from each other during normal use.

The pump and pump-type product of the present invention can reduce the likelihood that the first and second cylinder portions will become separated from each other during normal use.

1 is a cross-sectional view of a portion of a pump-type product according to one embodiment of the present invention. FIG. 2 is a perspective view of the upper cylinder portion shown in FIG. 1 . FIG. 3 is a top end view of the upper cylinder portion shown in FIG. 2 . FIG. 4 is a top end view of the upper cylinder portion when cut along a cutting plane different from the cutting plane shown in FIG. 3 . FIG. 2 is a perspective view of the lower cylinder portion shown in FIG. 1 . FIG. 6 is a top end view of the lower cylinder portion shown in FIG. 5 . 7A is a front view of a portion of the cylinder shown in FIG. 1 just before the insertion portion of the upper cylinder portion is inserted into the hole of the lower cylinder portion, and FIG. 7B is a front view of a portion of the cylinder shown in FIG. 7A when the lower cylinder portion is substantially omitted except for the lock portion. 8(a) is a front view of the part of the cylinder shown in Fig. 1 immediately after the insertion portion of the upper cylinder part has been inserted into the hole of the lower cylinder part, and Fig. 8(b) is a front view of the part of the cylinder shown in Fig. 8(a) when the lower cylinder part is substantially omitted except for the locking portion. 9(a) is a front view of a portion of the cylinder shown in FIG. 1 in a state where the inclined portion of the upper cylinder portion is in contact with the inclined portion of the lower cylinder portion, and FIG. 9(b) is a front view of a portion of the cylinder shown in FIG. 9(a) in a state where the lower cylinder portion is substantially omitted except for the locking portion. 10(a) is a front view of a portion of the cylinder shown in FIG. 1 in a state where the upper and lower cylinder portions are prevented from rotating relative to each other, and FIG. 10(b) is a front view of a portion of the cylinder shown in FIG. 10(a) in a state where the lower cylinder portion is substantially omitted except for the lock portion.

The following describes an embodiment of the present invention with reference to the drawings.

First, we will explain the configuration of a pump-type product according to one embodiment of the present invention.

Figure 1 is a cross-sectional view of a portion of a pump-type product 10 according to this embodiment.

As shown in FIG. 1, the pump-type product 10 comprises a container 20 for storing the contents and a pump 30 attached to the container 20.

The container 20 has an opening 21 through which the pump 30 is inserted. The opening 21 has a male thread 21a formed on its outer periphery.

The pump 30 comprises a cylinder 40, a piston 70 disposed within the cylinder 40 and movable in the direction of extension of the cylinder 40, i.e., the directions indicated by arrows 30a and 30b, a spring 31 disposed within the cylinder 40 relative to the piston 70 in the direction indicated by arrow 30a and biasing the piston 70 in the direction indicated by arrow 30b, a ball 32 disposed within the cylinder 40 relative to the spring 31 in the direction indicated by arrow 30a and constituting a check valve together with the cylinder 40, a bushing 33 that contacts the piston 70 to restrict movement of the piston 70 in the direction indicated by arrow 30b, an annular gasket 34 for sealing the gap between the mouth 21 of the container 20 and the cylinder 40, a cap 35 having an internal thread 35a formed on its inner periphery that mates with the external thread 21a of the container 20, a spout 36 attached to the piston 70 for discharging the liquid contents, and a dip tube 37 attached to the cylinder 40 for circulating the contents of the container 20 to the cylinder 40.

The cylinder 40 comprises an upper cylinder portion 50 serving as a first cylinder portion attached to the cap 35, and a lower cylinder portion 60 serving as a second cylinder portion attached to the upper cylinder portion 50.

Figure 2 is a perspective view of the upper cylinder portion 50. Figure 3 is a top end view of the upper cylinder portion 50. Figure 4 is a top end view of the upper cylinder portion 50 when cut along a different cut plane than the cut plane shown in Figure 3.

As shown in Figures 1 to 4, the upper cylinder portion 50 has a vertical hole 50a extending in the directions indicated by arrows 30a and 30b, and a horizontal hole 50b that penetrates from the inner peripheral surface to the outer peripheral surface. The vertical hole 50a and the horizontal hole 50b are connected to each other.

The upper cylinder portion 50 has an insertion portion 51 at its end in the direction indicated by arrow 30a, which is inserted into the lower cylinder portion 60. The insertion portion 51 has an annular protrusion 52 on its outer peripheral surface at its end in the direction indicated by arrow 30a, which seals the gap between the upper cylinder portion 50 and the lower cylinder portion 60. The insertion portion 51 has an annular protrusion 53 on its outer peripheral surface at its end in the direction indicated by arrow 30b, which has an outer diameter substantially the same as that of the protrusion 52, thereby preventing the upper cylinder portion 50 and the lower cylinder portion 60 from rattling relative to the other. The insertion portion 51 has a locking portion 54 on its outer peripheral surface, which prevents the upper cylinder portion 50 and the lower cylinder portion 60 from separating from each other.

The locking portion 54 has two L-shaped protrusions 55 that are approximately L-shaped. The two L-shaped protrusions 55 extend in the directions indicated by arrows 30a and 30b and are 180° apart around the central axis 41 of the cylinder 40 as the center of rotation. In other words, the locking portion 54 has two-fold symmetry with the central axis 41 as the center of rotation. The L-shaped protrusions 55 have a first protrusion 56 that extends in a first rotational direction indicated by arrow 40a around the central axis 41 as the center of rotation, and a second protrusion 57 that extends in the direction indicated by arrow 30a from the end of the first protrusion 56 in a second rotational direction indicated by arrow 40b that is opposite to the rotational direction indicated by arrow 40a.

The first convex portion 56 has a movement prevention portion 56a, which serves as a first cylinder movement prevention portion, at its end in the direction indicated by arrow 30b. The movement prevention portion 56a contacts the lower cylinder portion 60 to prevent movement of the upper cylinder portion 50 relative to the lower cylinder portion 60 in the direction in which the upper cylinder portion 50 moves away from the lower cylinder portion 60, i.e., in the direction indicated by arrow 30b. The movement prevention portion 56a extends in a direction perpendicular to the direction indicated by arrow 30b. The first convex portion 56 also has a rotation prevention portion 56b, which serves as a first cylinder second rotation direction rotation prevention portion, at its end in the direction indicated by arrow 40a. The rotation prevention portion 56b, which serves as a first cylinder second rotation direction rotation prevention portion, contacts the lower cylinder portion 60 to prevent rotation of the lower cylinder portion 60 relative to the upper cylinder portion 50 in the rotation direction indicated by arrow 40b. The wall surface of the first convex portion 56 that forms the rotation prevention portion 56b is inclined with respect to the radial plane of the upper cylinder portion 50. In other words, the wall surface forming the rotation prevention portion 56b is inclined with respect to a plane perpendicular to the outer peripheral surface of the upper cylinder portion 50.

The second convex portion 57 has a rotation prevention portion 57a at its end in the rotation direction indicated by arrow 40b. The rotation prevention portion 57a serves as a first cylinder first rotation direction rotation prevention portion that contacts the lower cylinder portion 60 to prevent rotation of the lower cylinder portion 60 relative to the upper cylinder portion 50 in the rotation direction indicated by arrow 40a. The wall surface of the second convex portion 57 forming the rotation prevention portion 57a is inclined with respect to a plane extending radially of the upper cylinder portion 50. That is, the wall surface forming the rotation prevention portion 57a is inclined with respect to a plane perpendicular to the outer peripheral surface of the upper cylinder portion 50. The second convex portion 57 has an inclined portion 57b at its end in the rotation direction indicated by arrow 40a to facilitate rotation of the lower cylinder portion 60 relative to the upper cylinder portion 50 in the rotation direction indicated by arrow 40b. The wall surface of the second convex portion 57 forming the inclined portion 57b is inclined with respect to a plane extending radially of the upper cylinder portion 50. That is, the wall surface forming inclined portion 57b is inclined relative to a plane perpendicular to the outer peripheral surface of upper cylinder portion 50. Second convex portion 57 is a portion that climbs over part of lower cylinder portion 60 when one of upper cylinder portion 50 and lower cylinder portion 60 is rotated relative to the other in the rotational directions indicated by arrows 40a and 40b, and constitutes the climb-over convex portion of the present invention. Note that the length of second convex portion 57 in the rotational direction indicated by arrow 40a is shorter than the length of movement prevention portion 56a in the rotational direction indicated by arrow 40a.

The upper cylinder section 50 has an operation mark 58 formed on its outer surface to indicate when the upper cylinder section 50 and the lower cylinder section 60 are to be separated from each other. The mark 58 is triangular in shape, with one vertex 58a at its tip in the direction indicated by arrow 30a.

Figure 5 is a perspective view of the lower cylinder portion 60. Figure 6 is a top end view of the lower cylinder portion 60.

As shown in Figures 1, 5, and 6, the lower cylinder portion 60 has a hole 60a into which the insertion portion 51 of the upper cylinder portion 50 is inserted, a hole 60b into which the ball 32 is inserted, and a hole 60c into which the dip tube 37 is inserted. Holes 60a, 60b, and 60c are interconnected.

The lower cylinder portion 60 has a locking portion 61 on the inner surface forming the hole 60a to prevent the upper cylinder portion 50 and the lower cylinder portion 60 from separating from each other.

The locking portion 61 has two L-shaped protrusions 62 and two protrusions 65, each of which is roughly L-shaped. The two L-shaped protrusions 62 are spaced 180° apart around the central axis 41 as the center of rotation. Similarly, the two protrusions 65 are also spaced 180° apart around the central axis 41 of the cylinder 40 as the center of rotation. In other words, the locking portion 61 has two-fold symmetry around the central axis 41 as the center of rotation.

The L-shaped convex portion 62 has a first convex portion 63 extending in the rotational direction indicated by arrow 40a, and a second convex portion 64 extending in the direction indicated by arrow 30a from the end of the first convex portion 63 in the rotational direction indicated by arrow 40a.

The first convex portion 63 is provided with a movement prevention portion 63a at its end in the direction indicated by arrow 30a. This movement prevention portion serves as a second cylinder movement prevention portion that prevents movement of the lower cylinder portion 60 relative to the upper cylinder portion 50 in the direction in which the lower cylinder portion 60 moves away from the upper cylinder portion 50, i.e., in the direction indicated by arrow 30a, by contacting the movement prevention portion 56a of the upper cylinder portion 50. The movement prevention portion 63a extends in a direction perpendicular to the direction indicated by arrow 30a.

The second convex portion 64 has a rotation prevention portion 64a at its end in the rotation direction indicated by arrow 40b. The rotation prevention portion 64a serves as a second cylinder second rotation direction rotation prevention portion that prevents rotation of the lower cylinder portion 60 relative to the upper cylinder portion 50 in the rotation direction indicated by arrow 40b by contacting the rotation prevention portion 56b of the upper cylinder portion 50. Of the wall surfaces of the second convex portion 64, the wall surface forming the rotation prevention portion 64a extends in the radial direction of the lower cylinder portion 60. In other words, the wall surface forming the rotation prevention portion 64a is perpendicular to the inner circumferential surface of the lower cylinder portion 60.

The protrusion 65 has a rotation prevention portion 65a at its end in the direction of rotation indicated by arrow 40a. The rotation prevention portion 65a serves as a second cylinder first rotation direction rotation prevention portion that prevents rotation of the lower cylinder portion 60 relative to the upper cylinder portion 50 in the direction of rotation indicated by arrow 40a by contacting the rotation prevention portion 57a of the upper cylinder portion 50. The wall surface of the protrusion 65 forming the rotation prevention portion 65a extends radially of the lower cylinder portion 60. That is, the wall surface forming the rotation prevention portion 65a is perpendicular to the inner circumferential surface of the lower cylinder portion 60. The protrusion 65 has an inclined portion 65b at its end in the direction of rotation indicated by arrow 40b, which facilitates rotation of the lower cylinder portion 60 relative to the upper cylinder portion 50 in the direction of rotation indicated by arrow 40b. The wall surface of the protrusion 65 forming the inclined portion 65b is inclined with respect to the plane extending radially of the lower cylinder portion 60. That is, the wall surface forming the inclined portion 65b is inclined relative to a plane perpendicular to the inner circumferential surface of the lower cylinder portion 60. The convex portion 65 is a portion that climbs over the second convex portion 57 of the upper cylinder portion 50 when one of the upper cylinder portion 50 and the lower cylinder portion 60 is rotated relative to the other in the rotational directions indicated by arrows 40a and 40b, and constitutes the climbing-over convex portion of the present invention. Note that the length of the convex portion 65 in the rotational direction indicated by arrow 40a is shorter than the length of the movement prevention portion 63a in the rotational direction indicated by arrow 40a.

The lower cylinder portion 60 has two knobs 66 on its outer surface for the operator to place their fingers on when separating the upper cylinder portion 50 and the lower cylinder portion 60. The two knobs 66 are spaced 180° apart with the central axis 41 as the center of rotation.

The lower cylinder section 60 has an operation mark 67 formed on its outer surface to indicate when the upper cylinder section 50 and the lower cylinder section 60 are to be separated from each other. The mark 67 is triangular in shape, with one vertex 67a at its tip in the direction indicated by arrow 30b.

As shown in FIG. 1, the piston 70 includes a first piston portion 71 to which the spout 36 is attached, a second piston portion 72 attached to the first piston portion 71, and a seal valve 73 supported by the first piston portion 71 and the second piston portion 72 so as to be movable in the directions indicated by arrows 30a and 30b.

The first piston portion 71 has a hole 71a into which the tip of the second piston portion 72 is inserted in the direction indicated by arrow 30b, and a flow path 71b that connects the tip of the first piston portion 71 in the direction indicated by arrow 30a to the tip of the first piston portion 71 in the direction indicated by arrow 30b when the second piston portion 72 is attached to the first piston portion 71.

The second piston portion 72 is attached to the first piston portion 71 by inserting the tip of the second piston portion 72 in the direction indicated by arrow 30b into the hole 71a. The second piston portion 72 is formed with a groove 72a for forming a gap between the second piston portion 72 and the cylinder 40 when part of the outer surface of the second piston portion 72 is in close contact with part of the inner surface of the cylinder 40, and a groove 72b for forming a gap between the second piston portion 72 and the seal valve 73 when part of the outer surface of the second piston portion 72 is in close contact with part of the inner surface of the seal valve 73.

The seal valve 73 has seal portions 73a and 73b formed on its outer surface to fit tightly against the inner surface of the cylinder 40, and seal portion 73c formed on its outer surface to fit tightly against the inner surface of the first piston portion 71. The seal valve 73 also has seal portion 73d formed on its inner surface to fit tightly against the outer surface of the second piston portion 72.

The diameter of the ends of spring 31 is smaller in the directions indicated by arrows 30a and 30b. Because the diameter of the end of spring 31 is smaller in the direction indicated by arrow 30a, when ball 32 moves in the direction indicated by arrow 30b, the end of spring 31 in the direction indicated by arrow 30a comes into contact with ball 32, thereby restricting the movement of ball 32 in the direction indicated by arrow 30b. Furthermore, the diameter of the end of spring 31 in the direction indicated by arrow 30b is also smaller than the diameter of the end of spring 31 in the direction indicated by arrow 30a. Therefore, when a worker places spring 31 in cylinder 40 during assembly of pump-type product 10, the worker does not need to be aware of the orientation of spring 31 in the directions indicated by arrows 30a and 30b, thereby improving workability.

The cap 35 has a groove 35b into which the cylinder 40 fits.

The spout 36 has an operating part 36a that is pressed by the user to dispense the contents. The spout 36 has a hole 36b into which the tip of the first piston part 71 is inserted in the direction indicated by arrow 30b, and a discharge port 36c through which the contents are dispensed. The spout 36 is attached to the first piston part 71 by inserting the tip of the first piston part 71 in the direction indicated by arrow 30b into the hole 36b. The hole 36b and the discharge port 36c are in communication.

Of the components that make up the pump-type product 10, the spring 31 and ball 32 are made of metal. On the other hand, all of the components that make up the pump-type product 10 other than the spring 31 and ball 32 are made of plastic.

Next, we will explain how to assemble the pump-type product 10.

First, we will explain how to assemble the cylinder 40.

Figure 7(a) is a front view of a portion of the cylinder 40 just before the insertion portion 51 of the upper cylinder portion 50 is inserted into the hole 60a of the lower cylinder portion 60. Figure 7(b) is a front view of a portion of the cylinder 40 in the state shown in Figure 7(a) when the lower cylinder portion 60 is largely omitted except for the lock portion 61.

First, the upper cylinder portion 50 and the lower cylinder portion 60 are coaxially aligned, as shown in Figure 7, with the apex 58a of the mark 58 on the upper cylinder portion 50 facing the apex 67a of the mark 67 on the lower cylinder portion 60. In the state shown in Figure 7, the L-shaped protrusion 55 on the upper cylinder portion 50 faces the gap between the two L-shaped protrusions 62 on the lower cylinder portion 60.

Figure 8(a) is a front view of a portion of the cylinder 40 immediately after the insertion portion 51 of the upper cylinder portion 50 has been inserted into the hole 60a of the lower cylinder portion 60. Figure 8(b) is a front view of a portion of the cylinder 40 in the state shown in Figure 8(a) when the lower cylinder portion 60 is largely omitted except for the lock portion 61.

The upper cylinder portion 50 and the lower cylinder portion 60 change from the state shown in Figure 7 to the state shown in Figure 8 by inserting the insertion portion 51 of the upper cylinder portion 50 into the hole 60a of the lower cylinder portion 60. Here, the L-shaped protrusion 55 of the upper cylinder portion 50 passes through the gap between the two L-shaped protrusions 62 of the lower cylinder portion 60.

Figure 9(a) is a front view of a portion of the cylinder 40 in a state in which the inclined portion 57b of the upper cylinder portion 50 is in contact with the inclined portion 65b of the lower cylinder portion 60. Figure 9(b) is a front view of a portion of the cylinder 40 in the state shown in Figure 9(a) when the lower cylinder portion 60 is largely omitted except for the lock portion 61.

When the lower cylinder section 60 is rotated relative to the upper cylinder section 50 in the direction indicated by arrow 40b from the state shown in Figure 8, the inclined portion 57b of the upper cylinder section 50 comes into contact with the inclined portion 65b of the lower cylinder section 60, as shown in Figure 9. Here, the first convex portion 56 of the upper cylinder section 50 passes through the gap between the first convex portion 63 of the lower cylinder section 60 and the convex portion 65 of the lower cylinder section 60.

Figure 10(a) is a front view of a portion of the cylinder 40 in a state in which relative rotation between the upper cylinder portion 50 and the lower cylinder portion 60 is prevented. Figure 10(b) is a front view of a portion of the cylinder 40 in the state shown in Figure 10(a) when the lower cylinder portion 60 is largely omitted except for the lock portion 61.

When the lower cylinder section 60 is rotated relative to the upper cylinder section 50 in the direction indicated by arrow 40b from the state shown in Figure 9, the inner diameter of the lower cylinder section 60 gradually increases due to contact between the inclined portion 57b of the upper cylinder section 50 and the inclined portion 65b of the lower cylinder section 60. As a result, the convex portion 65 of the lower cylinder section 60 overcomes the second convex portion 57 of the upper cylinder section 50, and then, as shown in Figure 10, the L-shaped convex portion 55 of the upper cylinder section 50 is positioned in the gap between the L-shaped convex portion 62 of the lower cylinder section 60 and the convex portion 65 of the lower cylinder section 60. In other words, the cylinder 40 is completed.

Here, the position of the upper cylinder portion 50 and the lower cylinder portion 60 shown in Figure 10 is referred to as the locked position. When the upper cylinder portion 50 and the lower cylinder portion 60 of the cylinder 40 are positioned in the locked position shown in Figure 10, the anti-rotation portion 56b of the upper cylinder portion 50 and the anti-rotation portion 64a of the lower cylinder portion 60 face each other and come into contact with each other, preventing rotation of the lower cylinder portion 60 relative to the upper cylinder portion 50 in the rotational direction indicated by arrow 40b. Also, when the upper cylinder portion 50 and the lower cylinder portion 60 of the cylinder 40 are positioned in the locked position shown in Figure 10, the anti-rotation portion 57a of the upper cylinder portion 50 and the anti-rotation portion 65a of the lower cylinder portion 60 face each other and come into contact with each other, preventing rotation of the lower cylinder portion 60 relative to the upper cylinder portion 50 in the rotational direction indicated by arrow 40a. Furthermore, when the upper cylinder portion 50 and the lower cylinder portion 60 of the cylinder 40 are positioned in the locked position shown in Figure 10, the movement prevention portion 56a of the upper cylinder portion 50 and the movement prevention portion 63a of the lower cylinder portion 60 face each other, and the biasing force of the spring 31 causes the movement prevention portion 56a and the movement prevention portion 63a to come into contact with each other, preventing movement of the lower cylinder portion 60 relative to the upper cylinder portion 50 in the direction indicated by arrow 30a.

When the lower cylinder portion 60 is rotated relative to the upper cylinder portion 50 in the direction indicated by arrow 40b by an operator from the state shown in Figure 8 to the state shown in Figure 10, the operator can improve workability by placing their finger on the knob 66 of the lower cylinder portion 60.

Next, we will explain how to assemble the piston 70.

The piston 70 is assembled by combining the first piston portion 71 and the second piston portion 72 with the seal valve 73 disposed between them.

Next, we will explain how to assemble the entire pump-type product 10.

First, the ball 32, spring 31, and piston 70 are inserted into the vertical hole 50a of the cylinder 40, and then the bushing 33 is inserted into the vertical hole 50a of the cylinder 40. The gasket 34 and dip tube 37 are then attached to the cylinder 40.

The cylinder 40 is then attached to the cap 35.

The spout 36 is then attached to the cylinder 40 to complete the pump 30.

Finally, the pump 30 cap 35 is attached to the container 20 containing the contents, completing the pump product 10.

In the above description, the gasket 34 is attached to the cylinder 40 before the cylinder 40 is attached to the cap 35, but it may also be attached to the cylinder 40 after the cylinder 40 is attached to the cap 35.

Similarly, although the dip tube 37 is attached to the cylinder 40 before the cylinder 40 is attached to the cap 35 in the above description, it may also be attached to the cylinder 40 after the cylinder 40 is attached to the cap 35.

Next, we will explain the operation of the pump-type product 10.

To eject the contents from the spout 36's outlet 36c, the user can press the spout 36's operating part 36a to push the spout 36 down in the direction indicated by arrow 30a.

When the spout 36 of the pump-type product 10 is pushed down in the direction indicated by arrow 30a, the piston 70 to which the spout 36 is attached is also pushed down in the direction indicated by arrow 30a.

When the piston 70 is pushed down in the direction indicated by arrow 30a, the seal valve 73, which is movably supported by the first piston portion 71 and the second piston portion 72, moves in the direction indicated by arrow 30b relative to the first piston portion 71 and the second piston portion 72 due to the pressure of the contents present in the direction indicated by arrow 30a relative to the seal valve 73 itself, and only a portion of the seal portion 73d comes into close contact with the outer surface of the second piston portion 72. As a result, the gap between the seal valve 73 and the second piston portion 72 is connected via groove 72b between the portion of the gap on the side of groove 72b in the direction indicated by arrow 30a and the portion of the gap on the side of groove 72b in the direction indicated by arrow 30b. Furthermore, because seal portions 73a and 73b of the seal valve 73 are in close contact with the inner surface of the cylinder 40, and seal portion 73c of the seal valve 73 is in close contact with the inner surface of the first piston portion 71, the contents inside the cylinder 40 do not pass through the gap between the seal valve 73 and the cylinder 40 or the gap between the seal valve 73 and the first piston portion 71.

Furthermore, when the piston 70 is pushed down in the direction indicated by the arrow 30a, the ball 32 is pushed down in the direction indicated by the arrow 30a by the pressure of the contents inside the cylinder 40. As a result, the ball 32 comes into close contact with the inner surface of the cylinder 40. Therefore, the contents inside the cylinder 40 do not pass through the gap between the ball 32 and the cylinder 40.

As described above, even when the piston 70 is pressed down in the direction indicated by arrow 30a, the contents inside the cylinder 40 do not pass through the gap between the seal valve 73 and the cylinder 40, the gap between the seal valve 73 and the first piston portion 71, or the gap between the ball 32 and the cylinder 40. Meanwhile, the portion of the interior of the cylinder 40 that exists in the direction indicated by arrow 30a relative to the piston 70 is in communication with the discharge port 36c of the spout 36 via the grooves 72a and 72b of the second piston portion 72 and the flow path 71b of the first piston portion 71. Therefore, when the piston 70 is pressed down in the direction indicated by arrow 30a, the contents are discharged from the discharge port 36c of the spout 36.

When the user releases the operating portion 36a of the spout 36, the piston 70 of the pump-type product 10 is pushed up in the direction indicated by arrow 30b by the biasing force of the spring 31.

When the piston 70 is pushed up in the direction indicated by arrow 30b, the seal valve 73, which is movably supported by the first piston portion 71 and the second piston portion 72, moves in the direction indicated by arrow 30a relative to the first piston portion 71 and the second piston portion 72, and all of the seal portion 73d comes into close contact with the outer peripheral surface of the second piston portion 72. Furthermore, the seal portions 73a and 73b of the seal valve 73 come into close contact with the inner peripheral surface of the cylinder 40, and the seal portion 73c of the seal valve 73 comes into close contact with the inner peripheral surface of the first piston portion 71. Therefore, the contents inside the cylinder 40 do not pass through the gap between the seal valve 73 and the cylinder 40, the gap between the seal valve 73 and the first piston portion 71, or the gap between the seal valve 73 and the second piston portion 72.

Furthermore, when the piston 70 is pushed up in the direction indicated by arrow 30b, the pressure of the contents inside the cylinder 40 becomes lower than the pressure of the contents inside the dip tube 37, and the ball 32 is pushed up in the direction indicated by arrow 30b by the pressure of the contents inside the dip tube 37. Therefore, the contents inside the dip tube 37 can pass through the gap between the ball 32 and the cylinder 40.

As described above, even when the piston 70 is pushed up in the direction indicated by arrow 30b, the contents inside the cylinder 40 do not pass through the gap between the seal valve 73 and the cylinder 40, the gap between the seal valve 73 and the first piston portion 71, or the gap between the seal valve 73 and the second piston portion 72. Meanwhile, the interior of the cylinder 40 is connected to the interior of the dip tube 37 via the gap between the ball 32 and the cylinder 40. Therefore, when the piston 70 is pushed up in the direction indicated by arrow 30b, the contents are filled from the dip tube 37 side into the portion of the interior of the cylinder 40 that is located in the direction indicated by arrow 30a relative to the piston 70.

When the piston 70 is pushed up in the direction indicated by arrow 30b, the interior of the container 20 is in communication with the outside of the pump product 10 via the horizontal hole 50b of the cylinder 40, the gap between the bushing 33 and the first piston portion 71, the gap between the cap 35 and the first piston portion 71, and the gap between the cap 35 and the spout 36, until the seal portion 73b of the seal valve 73 moves in the direction indicated by arrow 30b from the horizontal hole 50b of the cylinder 40. Therefore, air is introduced into the inside of the container 20 from outside the pump product 10.

Next, we will explain how to dispose of the pump-type product 10.

First, the cap 35 of the pump 30 is removed from the container 20.

Next, the upper cylinder portion 50 and the lower cylinder portion 60 of the pump 30 are separated from each other. Here, the procedure for separating the upper cylinder portion 50 and the lower cylinder portion 60 is the reverse of the procedure for assembling the cylinder 40.

That is, the upper cylinder portion 50 and the lower cylinder portion 60 are first rotated relative to the upper cylinder portion 50 in the direction indicated by arrow 40a from the state shown in Figure 10 so that the apex 58a of the mark 58 on the upper cylinder portion 50 faces the apex 67a of the mark 67 on the lower cylinder portion 60. As a result, as shown in Figure 8, the contact between the movement prevention portion 56a and the movement prevention portion 63a is released, allowing them to be separated from each other. Here, the position of the upper cylinder portion 50 and the lower cylinder portion 60 shown in Figure 8 is referred to as the unlocked position. Furthermore, because the wall surface forming the anti-rotation portion 65a of the lower cylinder portion 60 is perpendicular to the inner circumferential surface of the lower cylinder portion 60, when the upper cylinder portion 50 and the lower cylinder portion 60 are moved from the locked position shown in FIG. 10 to the unlocked position shown in FIG. 8, the convex portion 65 of the lower cylinder portion 60 will forcibly climb over the second convex portion 57 of the upper cylinder portion 50, resisting contact between the anti-rotation portion 57a of the upper cylinder portion 50 and the anti-rotation portion 65a of the lower cylinder portion 60. As a result, the convex portion 65 of the lower cylinder portion 60 will be crushed and damaged from its original shape and will not return to its original shape.

When the lower cylinder portion 60 is rotated relative to the upper cylinder portion 50 in the direction indicated by arrow 40a by an operator from the state shown in Figure 10 to the state shown in Figure 8, the operator can improve workability by placing his or her finger on the knob 66 of the lower cylinder portion 60.

After the upper cylinder portion 50 and the lower cylinder portion 60 reach the state shown in Figure 8, the insertion portion 51 of the upper cylinder portion 50 is removed from the hole 60a of the lower cylinder portion 60, thereby separating them from each other as shown in Figure 7. This makes it possible to remove the spring 31 and ball 32 that were located inside the cylinder 40 from inside the cylinder 40.

After removing the spring 31 and ball 32 from inside the cylinder 40, the person disposing of the pump product 10 can dispose of the spring 31 and ball 32 as metal waste, and dispose of the other parts of the pump product 10 other than the spring 31 and ball 32 as plastic waste. In other words, the person disposing of the pump product 10 can separate the metal waste from the plastic waste before disposing of it.

As explained above, in the pump 30, the movement prevention portion 56a of the upper cylinder portion 50 and the movement prevention portion 63a of the lower cylinder portion 60 extend in a direction perpendicular to the extension direction of the cylinder 40, as indicated by arrows 30a and 30b. When the lower cylinder portion 60 is rotated relative to the upper cylinder portion 50 in the direction indicated by arrow 40a, around the central axis 41, which extends in the direction indicated by arrows 30a and 30b, the movement prevention portion 56a of the upper cylinder portion 50 and the movement prevention portion 63a of the lower cylinder portion 60 are released from contact, allowing the upper cylinder portion 50 and the lower cylinder portion 60 to be separated from each other. This reduces the likelihood that the upper cylinder portion 50 and the lower cylinder portion 60 will be separated from each other by external forces in the directions indicated by arrows 30a and 30b, such as the biasing force of the spring 31 inside the cylinder 40, during normal use.

When the lower cylinder portion 60 of the pump 30 is rotated relative to the upper cylinder portion 50 in the direction indicated by arrow 40b, the convex portion 65 of the lower cylinder portion 60 moves over the second convex portion 57 of the upper cylinder portion 50, and the upper and lower cylinder portions 50 and 60 are placed in the locked position shown in FIG. 10, thereby reducing the possibility that the upper and lower cylinder portions 50 and 60 will separate from each other during normal use.

In the pump 30, the length of the second convex portion 57 of the upper cylinder portion 50 in the rotational direction indicated by arrow 40a is shorter than the length of the movement prevention portion 56a of the upper cylinder portion 50 in the rotational direction indicated by arrow 40a. Therefore, even if the length of the movement prevention portion 56a of the upper cylinder portion 50 in the rotational direction indicated by arrow 40a is increased to reduce the possibility of the upper cylinder portion 50 and the lower cylinder portion 60 separating in the extension direction of the cylinder 40 indicated by arrows 30a and 30b when the upper cylinder portion 50 and the lower cylinder portion 60 are positioned in the locked position, the convex portion 65 of the lower cylinder portion 60 is more likely to overcome the second convex portion 57 of the upper cylinder portion 50 compared to a configuration in which the length of the second convex portion 57 of the upper cylinder portion 50 in the rotational direction indicated by arrow 40a is equal to or greater than the length of the movement prevention portion 56a of the upper cylinder portion 50 in the rotational direction indicated by arrow 40a. Therefore, the pump 30 makes it easy for an operator to place the upper cylinder portion 50 and the lower cylinder portion 60 in the locked position shown in FIG. 10 or in the unlocked position shown in FIG. 8.

In this embodiment, the length of the second convex portion 57 of the upper cylinder portion 50 in the rotational direction indicated by arrow 40a is shorter than the length of the movement prevention portion 56a of the upper cylinder portion 50 in the rotational direction indicated by arrow 40a. However, the pump 30 may be configured such that the length of the second convex portion 57 of the upper cylinder portion 50 in the rotational direction indicated by arrow 40a is equal to or greater than the length of the movement prevention portion 56a of the upper cylinder portion 50 in the rotational direction indicated by arrow 40a.

In the pump 30, the length of the convex portion 65 of the lower cylinder portion 60 in the rotational direction indicated by arrow 40a is shorter than the length of the movement prevention portion 63a of the lower cylinder portion 60 in the rotational direction indicated by arrow 40a. Therefore, even if the length of the movement prevention portion 63a of the lower cylinder portion 60 in the rotational direction indicated by arrow 40a is increased to reduce the possibility of the upper cylinder portion 50 and the lower cylinder portion 60 separating in the extension direction of the cylinder 40 indicated by arrows 30a and 30b when the upper cylinder portion 50 and the lower cylinder portion 60 are positioned in the locked position, the convex portion 65 of the lower cylinder portion 60 is more likely to overcome the second convex portion 57 of the upper cylinder portion 50 compared to a configuration in which the length of the convex portion 65 of the lower cylinder portion 60 in the rotational direction indicated by arrow 40a is equal to or greater than the length of the movement prevention portion 63a of the lower cylinder portion 60 in the rotational direction indicated by arrow 40a. Therefore, the pump 30 makes it easy for an operator to place the upper cylinder portion 50 and the lower cylinder portion 60 in the locked position shown in FIG. 10 or in the unlocked position shown in FIG. 8.

In this embodiment, the length of the convex portion 65 of the lower cylinder portion 60 in the rotational direction indicated by arrow 40a is shorter than the length of the movement prevention portion 63a of the lower cylinder portion 60 in the rotational direction indicated by arrow 40a. However, the pump 30 may also be configured such that the length of the convex portion 65 of the lower cylinder portion 60 in the rotational direction indicated by arrow 40a is equal to or greater than the length of the movement prevention portion 63a of the lower cylinder portion 60 in the rotational direction indicated by arrow 40a.

When the upper cylinder portion 50 and the lower cylinder portion 60 of the pump 30 are placed in the locked position shown in FIG. 10 and the unlocked position shown in FIG. 8, the convex portion 65 of the lower cylinder portion 60 is damaged. Therefore, the worker assembling the cylinder 40 can determine whether the lower cylinder portion 60 has been placed in the locked position and the unlocked position based on the state of the convex portion 65 of the lower cylinder portion 60. Therefore, the pump 30 can reduce the possibility that a lower cylinder portion 60 that has been placed in the locked position and the unlocked position will be mistakenly reused to assemble the cylinder 40, for example.

In this embodiment, when the upper cylinder portion 50 and the lower cylinder portion 60 are positioned in the locked position shown in FIG. 10 and the unlocked position shown in FIG. 8, the convex portion 65 of the lower cylinder portion 60 is damaged. However, the pump 30 may be configured so that the convex portion 65 of the lower cylinder portion 60 is not damaged when the upper cylinder portion 50 and the lower cylinder portion 60 are positioned in the locked position shown in FIG. 10 and the unlocked position shown in FIG. 8. The pump 30 may also be configured so that the second convex portion 57 of the upper cylinder portion 50 is damaged when the upper cylinder portion 50 and the lower cylinder portion 60 are positioned in the locked position shown in FIG. 10 and the unlocked position shown in FIG. 8.

When the upper cylinder portion 50 and the lower cylinder portion 60 are positioned in the locked position shown in FIG. 10 and the unlocked position shown in FIG. 8, if the second convex portion 57 of the upper cylinder portion 50 is damaged, the worker assembling the cylinder 40 can determine, based on the state of the second convex portion 57 of the upper cylinder portion 50, whether the upper cylinder portion 50 has previously been positioned in the locked position and the unlocked position. Therefore, the pump 30 can reduce the possibility that, for example, an upper cylinder portion 50 that has previously been positioned in the locked position and the unlocked position will be mistakenly reused to assemble the cylinder 40.

The upper cylinder section 50 and the lower cylinder section 60 of the pump 30 are provided with marks 58 and 67, respectively, which indicate the unlocked positions. This allows the operator separating the upper cylinder section 50 and the lower cylinder section 60 to easily position the upper cylinder section 50 and the lower cylinder section 60 in the unlocked position shown in Figure 8 based on the marks 58 and 67, thereby facilitating the separation of the upper cylinder section 50 and the lower cylinder section 60.

The pump 30 has a knob 66 on the lower cylinder portion 60 that can be hooked with the fingers of an operator to rotate one of the upper and lower cylinder portions 50 and 60 relative to the other in the directions indicated by arrows 40a and 40b. This facilitates the task of rotating the other of the upper and lower cylinder portions 50 and 60 relative to the other in the directions indicated by arrows 40a and 40b, thereby facilitating the task of separating the upper and lower cylinder portions 50 and 60.

In this embodiment, the pump 30 has a knob 66 on the lower cylinder portion 60 for the operator's fingers to place when rotating one of the upper and lower cylinder portions 50 and 60 relative to the other in the directions indicated by arrows 40a and 40b. However, the pump 30 may be configured without a knob on the lower cylinder portion 60 for the operator's fingers to place when rotating the other of the upper and lower cylinder portions 50 and 60 relative to the other in the directions indicated by arrows 40a and 40b. The pump 30 may also be configured with a knob on the upper cylinder portion 50 for the operator's fingers to place when rotating the other of the upper and lower cylinder portions 50 and 60 relative to the other in the directions indicated by arrows 40a and 40b, either instead of or in addition to the knob on the lower cylinder portion 60.

When the upper cylinder portion 50 of the pump 30 is equipped with a knob that can be hooked with the fingers of an operator to rotate one of the upper and lower cylinder portions 50 and 60 relative to the other in the directions indicated by arrows 40a and 40b, this facilitates the task of rotating the other of the upper and lower cylinder portions 50 and 60 relative to the other in the directions indicated by arrows 40a and 40b, thereby facilitating the task of separating the upper and lower cylinder portions 50 and 60.

In this embodiment, the pump 30 has the upper cylinder portion 50 inserted into the lower cylinder portion 60. However, the pump 30 may also be configured so that the lower cylinder portion 60 is inserted into the upper cylinder portion 50. When the lower cylinder portion 60 is inserted into the upper cylinder portion 50, the lower cylinder portion 60 constitutes the first cylinder portion, and the upper cylinder portion 50 constitutes the second cylinder portion.

In this embodiment, the pump 30 is of a type that ejects the liquid contents, but it may also be of a spray type that sprays the liquid contents.

10 Pump-type product 30 Pump 30a Arrow (arrow indicating the direction in which the second cylinder portion moves away from the first cylinder portion in the extending direction of the cylinder)
30b Arrow (arrow indicating the direction in which the first cylinder portion moves away from the second cylinder portion in the extending direction of the cylinder)
31 Spring (metal part)
32 Ball (metal part)
40 Cylinder 40a Arrow (arrow indicating first rotation direction)
40b Arrow (arrow indicating second rotation direction)
41 Central axis (axis)
50 Upper cylinder part (first cylinder part)
56a Movement prevention unit (first cylinder movement prevention unit)
56b Rotation prevention unit (first cylinder second rotation direction rotation prevention unit)
57 Second convex part (convex part to be climbed over)
57a: Rotation prevention unit (first cylinder first rotation direction rotation prevention unit)
58 Mark 60 Lower cylinder part (second cylinder part)
63a Movement prevention unit (second cylinder movement prevention unit)
64a: Rotation prevention unit (second cylinder second rotation direction rotation prevention unit)
65 Convex part (convex part for climbing over)
65a: Rotation prevention unit (second cylinder first rotation direction rotation prevention unit)
66 Knob 67 Mark

Claims (8)

A pump for a pump-type product, comprising:
A cylinder and
a metal part disposed inside the cylinder,
The cylinder is
A first cylinder portion;
a second cylinder portion attached to the first cylinder portion,
The cylinder may be configured such that the first cylinder portion and the second cylinder portion are separated, thereby allowing the component to be removed from inside the cylinder itself;
the first cylinder portion includes a first cylinder movement prevention portion that contacts the second cylinder portion to prevent the first cylinder portion from moving relative to the second cylinder portion in a direction in which the first cylinder portion moves away from the second cylinder portion in the extension direction of the cylinder,
the second cylinder portion includes a second cylinder movement prevention portion that contacts the first cylinder movement prevention portion to prevent movement of the second cylinder portion relative to the first cylinder portion in a direction in which the second cylinder portion moves away from the first cylinder portion in the extension direction,
The first cylinder movement prevention portion and the second cylinder movement prevention portion extend in a direction perpendicular to the extension direction,
the first cylinder portion and the second cylinder portion are rotated relative to one another in a rotational direction around an axis extending in the extension direction, thereby releasing the contact between the first cylinder movement prevention portion and the second cylinder movement prevention portion and making them separable from each other;
the first cylinder portion and the second cylinder portion are capable of rotating in the rotation direction relative to one another while the first cylinder movement preventing portion and the second cylinder movement preventing portion are in contact with each other because the contact between the first cylinder portion and the second cylinder movement preventing portion is released ,
the first cylinder portion has a first cylinder first rotation direction rotation prevention portion at an end in a second rotation direction opposite to the first rotation direction, the first cylinder portion contacting the second cylinder portion to prevent rotation of the second cylinder portion relative to the first cylinder portion in a first rotation direction of the rotation directions, and has a convex portion to be overcome on an outer circumferential surface thereof that can be overcome by a part of the second cylinder portion when one of the first cylinder portion and the second cylinder portion is rotated relative to the other in the rotation direction;
the first cylinder portion includes a first cylinder second rotation direction rotation prevention portion that contacts the second cylinder portion to prevent rotation of the second cylinder portion relative to the first cylinder portion in the second rotation direction,
the second cylinder portion has a second cylinder first rotation direction rotation prevention portion at an end in the first rotation direction that prevents rotation of the second cylinder portion relative to the first cylinder portion in the first rotation direction by contacting the first cylinder first rotation direction rotation prevention portion, and has a jumping convex portion on an inner circumferential surface that jumps over the to-be-jumped convex portion when one of the first cylinder portion and the second cylinder portion is rotated in the rotation direction relative to the other,
the second cylinder portion includes a second cylinder second rotation direction rotation prevention portion that contacts the first cylinder second rotation direction rotation prevention portion to prevent rotation of the second cylinder portion relative to the first cylinder portion in the second rotation direction,
the first cylinder portion and the second cylinder portion are arranged in a locking position where, after the climbing convex portion climbs over the climbed-over convex portion by rotating the second cylinder portion in the second rotational direction relative to the first cylinder portion, the first cylinder movement preventing portion and the second cylinder movement preventing portion face each other, the first cylinder first rotational direction rotation preventing portion and the second cylinder first rotational direction rotation preventing portion face each other, and the first cylinder second rotational direction rotation preventing portion and the second cylinder second rotational direction rotation preventing portion face each other,
the first cylinder portion and the second cylinder portion are disposed in an unlocked position where the climbing convex portion climbs over the to-be-climbed convex portion by rotating the second cylinder portion in the first rotation direction relative to the first cylinder portion from the locked position,
a length of the to-be-ridden convex portion in the rotation direction is shorter than a length of the first cylinder movement prevention portion in the rotation direction;
The pump, characterized in that the length of the overcoming convex portion in the rotation direction is shorter than the length of the second cylinder movement prevention portion in the rotation direction . The pump described in claim 1, characterized in that the part includes a spring that urges the second cylinder portion toward the first cylinder portion in a direction that moves the second cylinder portion away from the first cylinder portion. 3. The pump according to claim 1, wherein the first cylinder second rotation direction rotation prevention portion and the second cylinder second rotation direction rotation prevention portion face each other in the rotation direction when the first cylinder portion and the second cylinder portion are disposed in the locked position. A pump for a pump-type product, comprising:
A cylinder and
a metal part disposed inside the cylinder;
Equipped with
The cylinder is
A first cylinder portion;
a second cylinder portion attached to the first cylinder portion; and
Equipped with
The cylinder may be configured such that the first cylinder portion and the second cylinder portion are separated, thereby allowing the component to be removed from inside the cylinder itself;
the first cylinder portion includes a first cylinder movement prevention portion that contacts the second cylinder portion to prevent the first cylinder portion from moving relative to the second cylinder portion in a direction in which the first cylinder portion moves away from the second cylinder portion in the extension direction of the cylinder,
the second cylinder portion includes a second cylinder movement prevention portion that contacts the first cylinder movement prevention portion to prevent movement of the second cylinder portion relative to the first cylinder portion in a direction in which the second cylinder portion moves away from the first cylinder portion in the extension direction,
The first cylinder movement prevention portion and the second cylinder movement prevention portion extend in a direction perpendicular to the extension direction,
the first cylinder portion and the second cylinder portion are rotated relative to one another in a rotational direction around an axis extending in the extension direction, thereby releasing the contact between the first cylinder movement prevention portion and the second cylinder movement prevention portion and making them separable from each other;
the first cylinder portion has a first cylinder first rotation direction rotation prevention portion at an end in a second rotation direction opposite to the first rotation direction, the first cylinder portion contacting the second cylinder portion to prevent rotation of the second cylinder portion relative to the first cylinder portion in a first rotation direction of the rotation directions, and has a convex portion to be overcome on an outer circumferential surface thereof that can be overcome by a part of the second cylinder portion when one of the first cylinder portion and the second cylinder portion is rotated relative to the other in the rotation direction;
the first cylinder portion includes a first cylinder second rotation direction rotation prevention portion that contacts the second cylinder portion to prevent rotation of the second cylinder portion relative to the first cylinder portion in the second rotation direction,
the second cylinder portion has a second cylinder first rotation direction rotation prevention portion at an end in the first rotation direction that prevents rotation of the second cylinder portion relative to the first cylinder portion in the first rotation direction by contacting the first cylinder first rotation direction rotation prevention portion, and has a jumping convex portion on an inner circumferential surface that jumps over the to-be-jumped convex portion when one of the first cylinder portion and the second cylinder portion is rotated in the rotation direction relative to the other,
the second cylinder portion includes a second cylinder second rotation direction rotation prevention portion that contacts the first cylinder second rotation direction rotation prevention portion to prevent rotation of the second cylinder portion relative to the first cylinder portion in the second rotation direction,
the first cylinder portion and the second cylinder portion are arranged in a locking position where, after the climbing convex portion climbs over the climbed-over convex portion by rotating the second cylinder portion in the second rotational direction relative to the first cylinder portion, the first cylinder movement preventing portion and the second cylinder movement preventing portion face each other, the first cylinder first rotational direction rotation preventing portion and the second cylinder first rotational direction rotation preventing portion face each other, and the first cylinder second rotational direction rotation preventing portion and the second cylinder second rotational direction rotation preventing portion face each other,
the first cylinder portion and the second cylinder portion are disposed in an unlocked position where the climbing convex portion climbs over the to-be-climbed convex portion by rotating the second cylinder portion in the first rotation direction relative to the first cylinder portion from the locked position,
A pump characterized in that at least one of the convex portion to be overcome and the convex portion for overcoming is a portion that breaks when the first cylinder portion and the second cylinder portion are positioned in the locked position and the unlocked position. The length of the to-be-ridden convex portion in the rotation direction is shorter than the length of the first cylinder movement prevention portion in the rotation direction;
a length of the overcoming convex portion in the rotation direction is shorter than a length of the second cylinder movement prevention portion in the rotation direction;
5. The pump according to claim 4, wherein at least one of the above is satisfied. 6. The pump according to claim 1, wherein the first cylinder portion and the second cylinder portion are provided with marks that indicate the unlocked positions. 7. The pump according to claim 1, wherein at least one of the first cylinder portion and the second cylinder portion is provided with a knob for an operator to hook with his/her fingers when rotating one of the first cylinder portion and the second cylinder portion relative to the other in the rotational direction. A pump-type product comprising a pump according to any one of claims 1 to 7.