JP4512977B2 - Slide lock device - Google Patents

Description

  The present invention relates to a slide lock device that adjusts the height of a shower head, a lamp stand, a microphone stand, and the like.

  A conventional slide lock device for adjusting the height of the device described above is disclosed in Japanese Patent Laid-Open No. 10-9487. This conventional slide lock device includes a flange portion fixed to a support base and the like, and a cylindrical portion integrally extending from the flange portion, and a shaft-like mating member passes through the cylindrical portion. Yes. The cylindrical portion has a smaller diameter on the tip side than the counterpart member, and a plurality of slits are formed on the tip side in the direction along the center line of the cylindrical portion, thereby forming a plurality of elastic holding pieces. Has been. Then, the elastic member elastically holds the mating member penetrating the cylindrical portion from the periphery, thereby stopping the mating member at a fixed position.

When the counterpart member is lifted with respect to such a stopped state, the holding piece is displaced so as to open, so that the lifting can be performed smoothly. Further, when the counterpart member is lowered, the elastic piece is displaced so as to bite into the outer periphery of the counterpart member. However, since the elastic force does not become excessive, it can be lowered.
Japanese Patent Laid-Open No. 10-9487

  As described above, in the conventional slide lock device, the mating member can be locked at a fixed position, and the mating member can be smoothly raised and lowered. On the other hand, in recent years, further improvement in operation feeling and further improvement in durability when raising and lowering the counterpart member are required.

The present invention has been made to meet such demands, and an object thereof is to provide a slide lock device capable of improving the operational feeling and durability.

In order to achieve the above object, the slide lock device of the present invention is sandwiched between a base provided with a taper means intersecting the axial direction at a portion facing the shaft-like mating member, and the mating member and the taper means in a pressure contact state. comprising a locking piece for locking by friction the relative movement between the mating member and the base, and an elastic member for biasing the lock piece in the pressure contact direction by being, the tapered section is pivotally attached to the base The base is provided with a biasing means for biasing the swinging plate in the contact direction with the lock piece. The lock piece is a frictional force generated by relative movement of the counterpart member in one direction. Increases, follows the movement, rotates, and moves in the friction force reducing direction by relative movement in the opposite direction.

Since the elastic member biases the lock piece into pressure contact direction, by frictional force of the lock piece to lock the relative movement of the mating member, it is possible to stop the mating member in place. Further, since the taper means is provided on the base and the lock piece is sandwiched between the taper means and the mating member, the friction force of the lock piece can be generated efficiently and satisfactorily, and the mating member is surely stopped. be able to.

Further, when the relative movement phase hand member in one direction, the frictional force of the lock piece is increased, while having a moderate resistance feeling can do the movement, when the relative movement of the mating member in the opposite direction, Since the lock piece moves and the frictional force is reduced, it can be moved easily. Therefore, it can be moved with an appropriate resistance in one direction and lightly moved in the opposite direction, so that the operation feeling is greatly improved. Furthermore, in the relative movement of the counterpart member in one direction, the lock piece rotates, so that wear can be suppressed and durability can be improved. Then, by adjusting the urging force of the urging means, the pressing force of the taper means to the lock piece can be changed, so that it can be versatile.

Te the slide locking apparatus odor, said mating member has a circular outer surface, said locking piece has a first contact surface which is formed in a substantially same curved surface as the outer surface of the mating member in contact with the outer surface of the mating member, the It is preferable to have a second contact surface formed integrally with the first contact surface and in contact with the base.

Since the first contact surface is in contact with the outer surface of the mating member and the second contact surface is in contact with the base, a frictional force can be reliably applied to the mating member. Further, it can be suitably applied to the other member having a circular column, a circular outer surface of the cylinder or the like.

  According to the slide lock device of the present invention, since the frictional force of the lock piece is increased by relatively moving the counterpart member in one direction, it can be moved while having an appropriate resistance, while the counterpart member is opposed. Since the frictional force of the lock piece is reduced by relative movement in the direction, it can be moved easily. For this reason, the operation feeling can be remarkably improved. Further, in the relative movement of the counterpart member in one direction, the lock piece rotates, so that wear can be suppressed and durability can be improved.

  Hereinafter, the present invention will be specifically described with reference to embodiments shown in the drawings. In each embodiment, the same members are assigned the same reference numerals.

(Embodiment 1)
1 to 6 show a slide lock device according to Embodiment 1 of the present invention. FIG. 1 is a longitudinal sectional view taken along line BB in FIG. 3, and FIG. 2 is a plan view taken along line AA in FIG. 3 is a plan view, FIG. 4 is a front view, FIG. 5 is a front view of the lock piece, and FIG. 6 is an enlarged cross-sectional view showing the operation of the lock piece.

  As shown in FIGS. 1 and 2, the slide lock device 1 of this embodiment includes a base 2, a lock piece 3, a compression spring 4 as an elastic member, and a cover 5.

  The base 2 is a member into which a shaft-like mating member 6 is inserted, and an insertion hole 2a for this purpose penetrates in the axial direction. The base 2 includes a cylindrical portion 2b extending along the length direction of the counterpart member 6, and a head portion 2c having a large diameter and integrally formed on the upper end portion of the cylindrical portion 2b. The slide lock device 1 of this embodiment is applied to the mating member 6 having a circular outer surface, and therefore the insertion hole 2a is a circular hole. A threaded portion 2d made of an external thread is formed on the outer peripheral surface of the cylindrical portion 2b, and a nut 40 is screwed onto the threaded portion 2d to be fixed to a support member 41 such as a table, a desk or a mounting bracket. (See FIGS. 11 and 12).

  Inside the head portion 2c of the base 2, a tapered surface 7 is formed as a taper means. The taper surface 7 is formed at a portion of the head portion 2c that faces the counterpart member 6, and has an inclination in which the diameter gradually increases as the distance from the cylindrical portion 2b increases. As a result, the taper surface 7 has an axial shape. It is formed so as to intersect with the counterpart member 6. By providing such an inclined tapered surface 7, a V-shaped gap is formed between the tapered surface 7 and the mating member 6, and the lock piece 3 is set in the V-shaped gap. In addition, the taper surface 7 is formed so that it may become a 3 equally divided position on the circumference.

  The lock piece 3 is placed between the base 2 (taper surface 7) and the mating member 6 by being placed on the respective taper surfaces 7. By being placed on each tapered surface 7, the lock piece 3 is arranged at three equal positions on the circumference with respect to the counterpart member 6. Thus, the lock piece 3 can contact the counterpart member 6 evenly from the equally divided position on the circumference by being arranged at the equally divided position on the circumference. The lock piece 3 is formed into a three-dimensional shape that contacts the outer surface of the mating member 6 and contacts the tapered surface 7.

  5 and 6 show the lock piece 3, and have a first contact surface 3 a that contacts the mating member 6 and a second contact surface 3 b that contacts the tapered surface 7. The first contact surface 3a is a curved surface having substantially the same curvature as the circular outer surface of the counterpart member 6, and the second contact surface 3b is integrated with both end portions in the length direction of the first contact surface 3a. Are formed in a continuous state. By having such contact surfaces 3a, 3b, the lock piece 3 has a drum shape with a constricted central portion.

  Such a lock piece 3 is pressed between the mating member 6 and the tapered surface 7 by being urged by a compression spring 4 to be described later while being sandwiched between the mating member 6 and the tapered surface 7. . Further, the lock piece 3 is rotatable while being sandwiched between the mating member 6 and the tapered surface 7, and is movable along the length direction of the mating member 6.

  The head portion 2c of the base 2 is formed with a spring accommodating space 2e having an open upper end, and a compression spring 4 as an elastic member is inserted into the spring accommodating space 2e. The compression spring 4 is inserted into the spring accommodating space 2e of the head portion 2c in a state where it is bent by a certain amount. Prior to insertion of the compression spring 4, a pressing plate 8 such as a washer is inserted into the spring accommodating space 2e, and the inserted pressing plate 8 comes into contact with the second contact surface 3b of the lock piece 3 from above (FIG. 6). reference). Thereby, since the urging force of the compression spring 4 acts on the lock piece 3 via the pressing plate 8, the lock piece 3 can be brought into pressure contact with the tapered surface 7 and the mating member 6.

  The cover 5 is put on the head portion 2c in a state of covering the head portion 2c of the base 2. In this case, an engagement groove 2f is formed on the outer surface of the head portion 2c, and an engagement protrusion 5a is formed on the cover 5 corresponding thereto, and the engagement protrusion 5a is engaged with the engagement groove 2f. Thus, the cover 5 is fixed to the head portion 2c. By this fixing, the state in which the compression spring 4 is bent can be maintained. In addition, the counterpart member 6 penetrates the cover 5.

  Next, the operation of this embodiment will be described. In the set state shown in FIG. 1, the lock piece 3 looks like a wedge with the first contact surface 3 a in contact with the outer surface of the mating member 6 and the second contact surface 3 b in contact with the tapered surface 7 and the pressing plate 8. Is inserted into a V-shaped gap (see FIG. 6). On the other hand, when the cover 5 is attached to the base 2, the lock piece 3 is pressed against the mating member 6 and the tapered surface 7 via the pressing plate 8 in order to maintain the state where the compression spring 4 is bent. For this reason, the lock | rock piece 3 has locked the other member 6 with the frictional force, and the other member 6 can be in the state stopped in the fixed position.

  When the mating member 6 is lowered in this state, the lock piece 3 enters the back of the V-shaped gap along the tapered surface 7, and the lock piece 3 is strongly pressed against the mating member 6. Thereby, since the frictional force with the counterpart member 6 increases, the lock piece 3 rotates following the movement of the counterpart member 6. At the same time, the mating member 6 descends with an appropriate resistance.

  On the other hand, when the counterpart member 6 is raised, the lock piece 3 in which the first contact surface 3 a is in contact with the outer surface of the counterpart member 6 tends to rise together with the counterpart member 6 due to the frictional force with the counterpart member 6. By this operation, the compression spring 4 bends via the pressing plate 8, so that the lock piece 3 can be raised, and the lock piece 3 moves along the tapered surface 7 and comes out of the V-shaped gap. Thereby, since the wedge effect by the lock | rock piece 3 is lose | eliminated and frictional force reduces, the other party member 6 can be raised easily with a light force.

  When the lifting operation on the mating member 6 is released, the lock piece 3 enters the V-shaped gap by the urging force of the compression spring 4 and presses against the tapered surface 7 and the mating member 6. Thereby, since the other party member 6 is locked by the frictional force of the lock piece 3, the other party member 6 can be in the state stopped at the raised position.

  In such an embodiment, the mating member 6 can be lowered with an appropriate resistance feeling by the lowering operation of the mating member 6 and can be easily raised by the raising operation of the mating member 6. For this reason, the operation feeling of the counterpart member 6 can be improved.

  Further, in the lowering operation of the mating member, the lock piece 3 rotates, so that the contact portion with the mating member 6 on the first contact surface 3a moves. Thereby, abrasion of the lock | rock piece 3 can be suppressed and durability can be improved.

(Embodiment 2)
7 to 10 show the slide lock device 11 according to the second embodiment of the present invention, FIG. 7 is a longitudinal sectional view thereof, FIG. 8 is a sectional view taken along a line CC in FIG. 7, and FIG. FIG. 10 is a cross-sectional view taken along the line D-D in FIG. 7, and FIG.

  In the slide lock device 11 of this embodiment, the base 2 in the first embodiment, the compression spring 4 as the elastic member, the drum-shaped lock piece 3 and the cover 5 are used. As the taper means, the swing plate 13 is used. Is used.

  The rocking plate 13 is disposed on the head portion 2c of the base 2 so as to be divided into three equal positions on the circumference. The lock piece 3 is disposed between the swing plate 13 and the shaft-like mating member 6 so as to correspond to the swing plate 13.

  The swing plate 13 is swingable within the head portion 2c by being attached to the head portion 2c via a pin 14. In this case, a plate slit 17 is formed at a three-divided position on the circumference of the head portion 2c (see FIG. 9), and the swing plate 13 is inserted into the plate slit 17 so that the swing plate 13 Swings in the plate slit 17. As the swing plate 13 swings in the direction of the mating member 6, the swing plate 13 is inclined and comes into contact with the lock piece 3. This inclination gradually moves away from the mating member 6 as it moves away from the cylindrical portion 2b of the base 2, whereby a V-shaped gap is formed between the swing plate 13 and the mating member 6. The The swinging of the swinging plate 13 in the direction of the mating member 6 is stopped by contacting the stopper convex portion 2h provided inside the head portion 2c of the base 2.

  In addition to the above, in this embodiment, a coil spring 15 as an urging means for urging the swing plate 13 in the direction of the counterpart member 6 is disposed. The coil spring 15 is attached to the inside of the head portion 2 c in the base 2 so as to correspond to each swing plate 13. Due to the urging force of each coil spring 15, the rocking plate 13 is inclined as described above and forms a V-shaped gap with the counterpart member 6.

  In this embodiment, since the lock piece 3 enters the V-shaped gap by the urging force of the compression spring 4 and performs a wedge action, the mating member 6 can be stopped at a fixed position by the frictional force of the lock piece 3.

  In this state, when the counterpart member 6 is lowered, the lock piece 3 enters the back of the V-shaped gap, so that the lock piece 3 is strongly pressed against the counterpart member 6. Thereby, the frictional force between the mating member 6 and the lock piece 3 is increased, and the mating member 6 can be lowered while having an appropriate resistance. At this time, the lock piece 3 descends while rotating following the movement of the counterpart member 6. With the lowering of the lock piece 3, the swing plate 13 swings outward with the pin 14 as the center, and applies a compressive force to the coil spring 15.

  In this embodiment, the biasing force of the coil spring 15 can be set smaller than the swinging force of the swinging plate 13. By setting in this way, the coil spring 15 is compressed by the swing plate 13, so that the swing plate 13 is in a substantially vertical state as shown in FIG. Therefore, the V-shaped gap between the mating member 6 disappears, the wedge effect by the lock piece 3 is eliminated, and the mating member 6 can be lowered with a small force. Thereby, in this embodiment, at the beginning of lowering the counterpart member 6, the member 6 is lowered with an appropriate resistance feeling, but thereafter, a light lowering with a small force without the resistance feeling can be performed. Thereby, the feeling of the descent operation of the other member 6 can be improved.

  Next, when the lowering operation to the mating member 6 is released, the rocking plate 15 is swung inward by the urging force of the compressed coil spring 15, so that the lock piece 3 is pressed against the mating member 6. To do. For this reason, the counterpart member 6 can be stopped at the lowered position by the frictional force of the lock piece 3.

  In addition, when the counterpart member 6 is continuously lifted with respect to the state shown in FIG. For this reason, it returns to the state shown in FIG. 7, and the counterpart member 6 can be stopped.

  When the other member 6 is further raised from the state shown in FIG. 7, the raising force acts on the lock piece 3 by the frictional force with the other member 6. Due to this action, the compression spring 4 bends via the pressing plate 8, so that the lock piece 3 can be lifted and come out of the V-shaped gap. Thereby, since the wedge effect by the lock | rock piece 3 is lose | eliminated and frictional force reduces, the other party member 6 can be raised easily with a light force. Therefore, the raising operation of the counterpart member 6 can be performed with a good feeling.

  In addition to the above, also in this embodiment, in the lowering operation of the counterpart member 6, the lock piece 3 rotates and the contact portion with the counterpart member 6 on the first contact surface 3a moves. Wear can be suppressed, and durability can be improved.

(Embodiment 3)
In this embodiment, an application example of the slide lock device 1 of the first embodiment is shown. FIG. 11 shows the application of the lamp stand 21, and FIG. 12 shows the application to the shower head 22. In these drawings, the slide lock device 1 is attached to a support member 41 such as a table or a mounting bracket. This attachment can be performed by screwing the nut 40 into the screw portion 2d of the cylindrical portion 2b and holding the support member 41 between the nut 40 and the head portion 2c.

  When the support member 41 is in the attached state, the above-described good feeling lifting / lowering operation can be performed to move between the solid line state and the chain line state, which makes it convenient to use the lamp stand 21 and the shower head 22. Improves.

  The present invention is not limited to the above embodiment, and various modifications can be made. For example, the position of the base 2 with respect to the counterpart member 6 may be reversed by arranging the base 2 so as to be opposite to the state of FIGS. Accordingly, the lowering operation of the mating member 6 can be easily performed, while the ascent operation of the mating member 6 can be performed with an appropriate resistance feeling. Further, the frictional force of the lock piece 3 may be increased by roughing the outer surface of the lock piece 3, performing a coating process, or performing knurling. Furthermore, the number of the lock pieces 3 may be other than three such as one, two, four or more. Thereby, the frictional force can be adjusted. Furthermore, the counterpart member 6 does not have to be a circular outer surface, and may be a polygonal outer surface such as a square. In this case, it can operate similarly by making the lock piece 3 into a shape matching the corners of the polygon.

It is a longitudinal cross-sectional view of the BB line in FIG. 3 of the slide lock apparatus in Embodiment 1 of this invention. It is the sectional view on the AA line in FIG. 1 is a plan view of a slide lock device in Embodiment 1. FIG. 1 is a front view of a slide lock device in Embodiment 1. FIG. It is a front view of a lock piece. It is an expanded sectional view which shows the effect | action of a locking device. It is a longitudinal cross-sectional view of the slide lock apparatus in Embodiment 2 of this invention. It is CC sectional view taken on the line in FIG. It is the DD sectional view taken on the line in FIG. 10 is a longitudinal sectional view showing the operation of the slide lock device in Embodiment 2. FIG. It is a partially broken front view which shows the state applied to the desk lamp. It is a partially broken side view which shows the state applied to the shower head.

1, 11 Slide lock device 2 Base 3 Lock piece 3a First contact surface 3b Second contact surface 4 Compression spring 5 Cover 6 Opposing member 7 Tapered surface 13 Oscillating plate 15 Coil spring

Claims (2)

A base provided with a taper means that intersects the axial direction at a portion facing the shaft-like mating member;
A lock piece that locks the relative movement between the mating member and the base by a frictional force by being sandwiched between the mating member and the taper means;
And an elastic member for biasing the lock piece in the pressure contact direction,
The taper means is composed of a swing plate attached to the base so as to be swingable, and biasing means for biasing the swing plate in a contact direction with the lock piece is provided on the base.
A slide lock characterized in that the lock piece increases in frictional force due to relative movement in one direction of the mating member, rotates following the movement, and moves in the direction of reduced frictional force by relative movement in the opposite direction. apparatus. The mating member is a circular outer surface, and the lock piece is formed in a curved surface substantially the same as the outer surface of the mating member and contacts the outer surface of the mating member;
The first contact surface and that claim 1 Symbol mounting of the slide lock device, characterized in being formed together and a second contact surface that contacts the base.

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