JP5944684B2 - Body case and adapter attachment / detachment mechanism - Google Patents

Description

The present invention relates to an attachment / detachment mechanism for a main body case and an adapter, and enables easy and reliable attachment / detachment of an adapter for a main body case and a high-pressure gas container, and whether or not a high-pressure gas container has been used easily and reliably. It is something that you can know.

When attaching a high-pressure gas container to the main body case, it is common to screw a male screw formed on the outer peripheral surface of the neck of the high-pressure gas container with a female screw formed on the inner peripheral surface of the attachment opening of the main body case (for example, Patent Document 1, 2) adopts an adapter, and after attaching a high-pressure gas container to this adapter, this adapter is also known to be bayonet-coupled to the attachment port of the main body case (for example, Patent Documents 3 and 4).

In addition, the high-pressure gas container to be used must be unused, but there is a risk that the used one is inadvertently adopted. Especially when the opening device is attached to a life jacket, it has a serious effect on human life. In view of this, various methods have been disclosed to prevent misuse by displaying used when a high-pressure gas container is used (for example, Patent Documents 1, 2, 3, and 4).

JP 2001-213391 A JP 2004-58971 A USP 5413247 Specification PCT Publication WO 03/022631 A2

The screwing method disclosed in Japanese Patent Application Laid-Open No. 2001-213391 of Patent Document 1 and Japanese Patent Application Laid-Open No. 2004-58971 of Patent Document 2 involves the following difficulties when the screw pitch is small and the number is large. . First, if the screw of the adapter is not aligned with the screw of the high-pressure gas container at the time of attachment / detachment, the screw is screwed in at a different level, and screwing becomes impossible. This alignment is unexpectedly troublesome. Next, it is necessary to rotate many times, and the work is troublesome.

The bayonet type attachment / detachment mechanism shown in US Pat. No. 5,413,247 of Patent Document 3 and PCT Publication WO 03/022631 A2 of Patent Document 4 can be used to attach a high-pressure gas container with a so-called one-touch, but can also be detached. Since it can be easily performed in the opposite direction to the operation, there is a risk that it will be removed against the intention of maintaining the mounting state.

Means for indicating whether a high-pressure gas container is used or not is disclosed in the above-mentioned Patent Documents 1 to 3 and PCT Publication WO 03/022631 A2 of Patent Document 4.

According to Japanese Patent Laid-Open No. 2001-213391 of Patent Document 1, as shown in paragraph 0049 and FIG. 9, a part of the gas ejected from the cylinder 65 is introduced into the indicator 49, and the improper display body 56 is moved. The cylinder can be used or not. In this case, it is necessary to prepare the indicator 49 separately, and there is a disadvantage that the structure is complicated and the cost is increased.

In Japanese Patent Application Laid-Open No. 2004-58971 of Patent Document 2, as shown in paragraph 0031 and FIG. 6, when the life-saving floating body expansion device 1 is automatically or manually operated, the seesaw type lever 22 is the same as the firing needle 12. The transmission rod 14 is also slid in the direction, and the color display ring 38 in the color display ring 18 is pushed out at the tip of the transmission rod 14 to eliminate usable colors in the main body color display window 19 and the plug 16 is connected to the socket 24. The inside of the socket color display window 32, which has been the usable color 6... Until then, is filled with the unusable color 7 and is stationary. In this case, in addition to the plug 16 and the socket 24, it is necessary to form the fitting groove 18 of the color display ring 38 of the plug 16 in the life-saving floating body inflating device 1, so that the structure is very complicated and naturally increases the cost.

Next to “optical display means” in the middle of the second column, “ha” has been removed because the following semicircle () is a supplementary explanation for this optical display means.
Claims 2 and 3 in US Pat. No. 5,413,247 of Patent Document 3 disclose optical display means for visually confirming that the cartridge 10 has been opened. Claim 2 is a configuration in which the separating element 14 is operated with a component force when the cutter 19 moves in the direction to open the cartridge 10, and the optical display means is pushed out from the disposable part 11. Claim 3 is a dependent claim of Claim 2 and specifically specifies the optical display means as “small display plate 13”. The small display board 13 is also pushed out of the disposable part 11 even under the pressure of the jet gas.
Here disposable part 11 is employed, the optical display hand stage (small display panel 13) is freely removable from the disposable part 11 by an external force. Therefore, it is not intended for repeated use and is extremely uneconomical and contrary to today's recycling and resource saving trends.

There is a description of “Thus, while moving ... an inoperable condition” in the 5th line to the 13th line from the top of page 22 of PCT publication WO 03/022631 A2 of Patent Document 4, and it will be as follows when translated.
“Thus, while moving to the extended position, the standing arm 102 forcibly crushes the crushing collar 44 of the cylinder adapter 40, and at the same time, the indicator shutter 100 moves on the same line as the indicating window 26.“ Red ”color. It can be readily seen that the red indicator shutter 100, along with the reciprocating member 96, can be seen through the indicator window 26 upon activation of the inflator 10 to indicate that the inoperable state is visible. The red standing arm 102 extending from the end of the boss 14 and the cutting arm 106 seen in the impact groove 92 similarly indicate an inoperable state. "
According to this, the structure of the reciprocating member 96 is complicated, which may increase the cost, and the reliability of the operation must be questioned.

(Claim 1) A main body case and adapter attaching / detaching mechanism according to the present invention includes a main body case and an adapter. The main body case has an attachment port for the adapter. The adapter is a cylindrical body with a shaft hole, one end of the shaft hole is a mounting portion of the high-pressure gas container, and the other end is an introduction portion of the firing pin, and the outer diameter on the mounting portion side is It is larger than the outer diameter on the introduction part side. A bayonet-type engagement mechanism is separately provided on the outer wall surface on the introduction portion side and the inner wall surface of the attachment port. The introduction part is provided with a display window at a position where it can be opened to the outside even when the adapter is attached to the attachment port. The main body case includes a locking mechanism for maintaining the engagement state of the engagement mechanism at the attachment port.

The adapter is used when the high pressure gas container is attached to the main body case. After the high pressure gas container is attached to one end of the adapter, the other end of the adapter is attached to the attachment opening of the main body case. With this attachment, one end portion of the firing pin conduction shaft that is in communication with the attachment opening and is slidably fitted into a through hole provided in the main body case enters the shaft hole. An indicator is attached to one end of the firing pin conduction shaft, and a needle is attached to the end of the indicator. The length of the firing pin conduction axis may include the indicator, and a needle may be attached to the end portion by marking the side surface of the firing needle conduction shaft. Appropriate labels such as color coding, letters or figures can be adopted as the signs.

Since the other end of the adapter is bayonet-engaged with the mounting opening, the operation can be performed with one touch.
In addition, since the adapter has an outer diameter on the side of the mounting portion larger than the outer diameter on the side of the introduction portion, the inner diameter of the mounting port of the main body case can be reduced, and this portion is not affected even if a lock mechanism is provided. The display window is not blocked even if a high pressure gas container is attached to the adapter.

The display window is provided at the other end, and is open even when the other end is attached to the attachment port. When the shooter conduction shaft is moved by human force or the release force of the spring, the piercing needle breaks through the sealing plate of the high-pressure container and takes out the gas inside. If a “useable” sign is provided for the firing pin conduction axis, the marking also changes due to the movement of the firing needle conduction axis, and the use is disabled.

“Distribution” in the description of “distributing bayonet-type engagement elements on the outer wall surface on the introduction portion side and the inner wall surface of the attachment port” is a pair of cooperating with each other necessary for bayonet engagement. This means that the engaging element is arranged separately for each member to be engaged.

When the other end portion is attached to the attachment port, the lock mechanism is forcibly dissipated by one of the provided engagement elements, so that there is no problem in engagement, and when the bayonet engagement is completed, the lock mechanism is Since the suppression by the one side is released, the bayonet engagement state is maintained by returning to the original position.

(Claim 2 ) The engagement mechanism has a projection on the outer wall surface side of the mounting portion and a recess on the inner wall surface side, and the projection and the recess are respectively on the diameter and at an angle in which one of them is in the circumferential direction. The display window may be configured to be engaged only at a specific relative position so as to be opposed to the shifted position, and the display window may be opened in a specific direction when the engagement mechanism is engaged.
In this way, the protrusions have the same peripheral length, making it easy to measure the dimensions, and the adapter and the main body case can only be fitted at a fixed position. By doing so, the use or non-use of the high-pressure gas container can be confirmed visually.

(Claim 3) engagement mechanism outer wall side the inner wall surface side has a recess, protrusion and recess the other of the outer periphery on each diameter and the outer peripheral length of each one in the projection of the mounting portion The display window may be set to be larger than the length so as to be engaged only at a specific relative position, and the display window is opened in a specific direction when the engagement mechanism is engaged.
In this way, since the protrusions are placed on the diameter, manufacturing is easy, and the adapter and the main body case can be fitted only at a fixed position, so the user can freely decide the opening direction when the display window is fitted. Use of the high-pressure gas container can be surely visually confirmed by the relative use.

(Claim 4 ) The display window is configured to display a used high-pressure gas container so that a marker provided with respect to the firing pin conduction axis can be visually recognized when the firing pin conduction shaft moves in the introduction portion. Also good.
By doing so, it is possible to guarantee that the high-pressure gas container has been used since the needle attached to the firing pin conduction shaft always pierces the sealing plate in the state where the sign appears in the display window. “Regarding” means that the marker may be provided on the firing pin transmission shaft, or may be provided on the support body supported by the puncture needle at the other end and coupled to the firing needle conduction shaft. Can be used as appropriate, such as color coding, letters or figures.

(Claim 5 ) The lock mechanism includes a lock piece that protrudes on the movement path of the protrusion of the adapter, a spring that presses the lock piece in the axial direction of the mounting port, and a knob that is coupled to the lock piece. It may be.
In this way, the lock mechanism can be disengaged from the bayonet engagement state by the knob, and unless the knob is operated, the other end portion is not allowed to return. Never leave.

(Claim 6 ) The lock piece has an annular shape, and is accommodated in an annular groove concentric with the attachment port formed in the peripheral wall of the attachment port so as to be movable in the axial direction of the attachment port. The protrusion comes into contact with and presses against the contact surface of the lock piece by press-fitting, and is returned to the original position by the spring in a state of being detached from the contact surface by the subsequent rotation operation, and at the end surface in the bending direction of the protrusion. The adapter may be engaged with the side surface to prevent the adapter from returning.
In this way, the protrusion can be automatically locked by the automatic return of the lock piece, and once locked, the lock piece does not return to its original state unless an artificial force is applied. There is no fear of escaping.

( 7 ) The knob is elastically engaged with the lock piece from the outside of the main body case through a long hole formed in the main body case, and the end surface of the lock piece is moved by the movement of the knob. Remove from the side surface of the protrusion may be protruding so as to permit the force of the return.
In this way, the knob can be coupled to the lock piece through the elongated hole in a state where the lock piece is housed in the cut-out annular groove, and it is easy to assemble, and the lock piece is retracted by the knob. Can be removed from the main body case.

The slot of (claim 8) body case, the movement range of the knob, the range in which the locking piece does not escape from the deletion annular groove, may be regulated.
In this way, the lock piece can be prevented from escaping from the annular groove.

The main body case and the adapter attaching / detaching mechanism according to the present invention have the following effects. That is, the other end of the adapter operation since bayonet engages in the mounting opening is Ru can one-touch. Since the adapter has an outer diameter on the side of the mounting portion larger than the outer diameter on the side of the introduction portion, the inner diameter of the mounting opening of the main body case can be reduced, and this portion does not increase even if a lock mechanism is provided.

Display window Ru can display the use or non-use of high pressure gas vessels since the position exposed even when attached the other end to a mounting opening visibly. The locking mechanism is forcedly retracted to the retracted position by the engaging element when the other end is attached, so that there is no hindrance to the engagement, and when the bayonet engagement is completed, the locking mechanism releases the restraint by the engaging element. Therefore, the bayonet engagement state is maintained by returning to the original position.

According to the second and third aspects, the adapter and the main body case can be fitted only at a fixed position, and the display window is opposed to the user in the engaged state, so that the use or non-use of the high-pressure gas container can be reliably confirmed. .

According to claim 4 , the adapter and the main body case can be fitted only at a fixed position, and the display window faces the user in the fitted state, so that the user can visually check whether the high-pressure gas container is used or not used. it can.

According to claim 5 , by operating the knob, the lock mechanism can be released to remove the adapter from the main body case, and when the knob is released after removal, the knob is returned to the original position by the spring to prepare for the next installation of the adapter. As long as the knob is not operated, there is no risk that the adapter will come off the case.

According to the sixth aspect , the protrusion can be automatically locked by the automatic return of the lock piece.

According to the seventh aspect , the knob can be coupled to the lock piece through the elongated hole in a state where the lock piece is housed in the cut-out annular groove, the assembly is easy, and the lock piece is retracted by the knob so that the adapter is removed from the main body case. Can be removed.

According to the eighth aspect , the lock piece can be prevented from escaping from the cut-out annular groove.

It is a perspective view which shows the specific example of the attachment / detachment mechanism of the main body case and adapter concerning this invention as an object for incorporation with respect to the life jacket wearing expansion device. It is a 2-2 line cutting slope view of FIG. FIG. 3 is a view taken along line 3-3 of the adapter portion of FIG. 2. FIG. 4 is a view taken along line 4-4 of the main body case portion of FIG. 2. 4 is a perspective view including a lock piece 61 of the lock mechanism 12. FIG. It is a detailed slope view of the firing pin conduction shaft 6.

(Claim 1) The attachment / detachment mechanism of the main body case and the adapter according to the present invention includes the main body case 1 and the adapter 2. The main body case 1 includes an attachment port 3 for an adapter 2. The adapter 2 is a cylindrical body provided with a shaft hole 4, one end of the shaft hole 4 is an attachment portion 5 of the high-pressure gas container B, and the other end is an introduction portion 7 for the firing pin conduction shaft 6. Further, this adapter has an outer diameter D on the attachment portion 5 side larger than an outer diameter d on the introduction portion 7 side.

A bayonet-type engagement mechanism 10 is separately provided on the outer wall surface 8 on the introduction portion 7 side and the inner wall surface 9 of the attachment port 3. The introduction portion 7 is provided with a display window 11 at a position where the display window 11 is opened to the outside even when the adapter 2 is attached to the attachment port 3. The main body case 1 is provided with a lock mechanism 12 for maintaining the engagement state of the engagement mechanism 10 in the attachment port 3.

The main body case 1 is for opening the high-pressure gas container B attached to the main body case 1 and sending the internal pressure gas in response to demands on the demand side. For example, the main body case 1 is attached to a life jacket, and the sealing plate 53 of the high-pressure gas container B is manually broken or released by the release of the working rod restrained by a paper ring having water brittleness, and the body is covered with gas. Inflate. Moreover, in a drink container, an internal liquid is extruded with this gas pressure.

Although the high-pressure gas container may be directly attached to the main body case, in the present invention, it is attached to the main body case 1 via the adapter 2. Since the adapter 2 has an outer diameter D on the attachment portion 5 side larger than an outer diameter d on the introduction portion 7 side, the inner diameter of the attachment port 3 of the main body case 1 can be reduced, and even if the lock mechanism 12 is provided. This part does not become large.

The high-pressure gas container B is attached to the attachment portion 5 of the adapter 2, and the adapter 2 is attached to the attachment port 3 of the main body case 1. This attachment is a screw type in the illustrated case, but may be a bayonet type.

The adapter 2 is attached to the main body case 1 by using a bayonet engagement mechanism 10 provided separately on the outer wall surface 8 on the other end side and the inner wall surface 9 of the attachment port 3. Since the display window 11 is opened to the outside even when the attachment is completed, it can be confirmed through the display window 11 when the firing pin conducting shaft 6 moves for opening. As a precaution, it is desirable to place a marker 51 on the firing pin conducting shaft 6.

The lock mechanism 12 protrudes elastically on the moving path of the engagement mechanism 10 of the adapter 2 and is forcibly retracted by the engagement mechanism 10 when the other end portion of the adapter 2 is press-fitted into the attachment port 3. The engagement mechanism 10 is allowed to enter by dissipating to the position.

When the adapter 2 is rotated and the engagement mechanism 10 is separated from the lock mechanism 12, the lock mechanism 12 returns to the original position and maintains the bayonet engagement state. By this separation, the engagement mechanism 10 of the adapter 2 and the lock mechanism 12 does not interfere with each other in the relative axial movement of the adapter 2 and the lock mechanism 12 and only interferes with the relative rotational operation. . Therefore, even if the adapter 2 is pushed in, the engagement mechanism 10 cannot disengage the locking mechanism 12 of the attachment port 3 from the current position, and the adapter 2 remains unrotatable and cannot be removed from the attachment port 3. Can guarantee.

(Claim 2 ) The engaging mechanism 10 has a protrusion 31 on the outer wall surface 8 side of the mounting portion 5 and a recess 32 on the inner wall surface 9 side, and the protrusion 31 and the recess 32 are on the diameter and one of them is in the circumferential direction. It is opposed to a position shifted by a certain angle θ and can be engaged only at a specific relative position. The display window 11 is opened in a specific direction when the engagement mechanism 10 is engaged.
In this case, since the peripheral length of the protrusion 31 is the same, the dimensions can be easily taken, and the adapter 2 and the main body case 1 can be fitted only at a predetermined position. Therefore, the opening direction in the engaged state of the display window 11 can be freely determined. Use or non-use of the high-pressure gas container B can be surely confirmed by making it relative to the user.

(Claim 3) engaging mechanism 10 the inner wall 9 and outer wall surface 8 side of the mounting portion 5 by the projection 41 has a recess 42. The projection 41 and the recess 42 are opposed to each other on the diameter and with one outer peripheral length larger than the other outer peripheral length, and can be engaged only at a specific relative position. The display window 11 is opened in a specific direction with the bayonet engaged.
In this case, since the projection 41 is opposed to the diameter, it is easy to manufacture, and the adapter 2 and the main body case 1 can be fitted only at a fixed position. Therefore, the opening direction in the fitted state of the display window 11 can be freely determined. Thus, the use or non-use of the high-pressure gas container B can be surely visually confirmed by making it relative to the user.

(Claim 4 ) The display window 11 uses the high-pressure gas container B so that when the firing pin conduction shaft 6 moves in the introduction portion 7, the firing needle conduction shaft 6 or the marker 51 provided on the firing needle conduction shaft 6 can be visually recognized. Is displayed. As the sign 51, an appropriate one such as color coding, characters or display can be adopted.
In this case, when the marker 51 appears in the display window 11, the needle 52 attached to the firing pin conducting shaft 6 always breaks through the sealing plate 53, so that it can be guaranteed that it has been used. The marker 51 may be provided on the firing pin conduction shaft 6, but may be provided on a support 54 that is adjacent to the firing needle conduction shaft 6 on the same axis and supports the needle 52 on the other end surface.

A fitting hole 55 and a gas passage hole 56 of the needle 52 are opened on the other end surface of the support 54, and the fitting hole 55 and the gas passage hole 56 merge with a lead-out hole 57 on the inner surface. Open. An inclined path 59 that guides the gas is formed on the surface where the firing pin conduction shaft 6 contacts the support 54 and the reduced diameter portion 58 on the side surface. The reduced diameter portion 58 communicates with a demand side gas introduction hole (not shown). Reference numeral 60 denotes an O-ring. Reference numeral 54 ′ denotes a resistance piece protruding from the other end surface of the support body 54, so that the support body 54 does not easily escape from the shaft hole 4.

(Claim 5 ) The lock mechanism 12 includes a lock piece 61 that protrudes on the moving path of the protrusions 31 and 41 of the adapter 2, a spring 62 that presses the lock piece 61 in the direction of the axis x of the mounting port 3, and the lock piece 61. And a knob 63 coupled to the.
In this case, by operating the knob 63, the lock mechanism 12 is released and the adapter 2 can be detached from the main body case 1, and if the knob 63 is released after the removal, the knob 63 returns to the original position by the spring 62 and the adapter 2 is attached next. Be prepared for.

(Claim 6 ) The lock piece 61 has an annular shape, and is accommodated in an annular groove 71 formed concentrically with the attachment port 3 on the peripheral wall of the attachment port 3 so as to be movable in the direction of the axis x of the attachment port 3. 2, the protrusions 31, 41 abut against the abutment surface 72 of the lock piece 61 and push it in, and then return to the original position by the spring 62 in a state of being detached from the abutment surface 72 by the subsequent rotation operation. The end face 73 in the direction engages with the side faces 74 and 75 of the protrusions 31 and 41 to prevent the adapter 2 from returning.
In this case, the protrusions 31 and 41 can be automatically locked by the automatic return of the lock piece 61. Once locked, the lock piece 61 does not return to its original state unless an artificial force is applied. There is no risk of escaping from the body case.

(Claim 7 ) The knob 63 is elastically engaged with the lock piece 61 from the outside of the main body case 1 through the long hole 81 formed in the main body case 1, and the end surface 73 of the lock piece 61 is moved by the movement of the knob 63. The protrusions 31 and 41 are removed from the side surfaces 74 and 75 to allow the protrusions 31 and 41 to return.
In this case, the knob 63 can be coupled to the lock piece 61 and the long hole 81 in a state where the lock piece 61 is housed in the cut-out annular groove 7, and assembling is easy. Can be removed from the main body case 1.

(Embodiment 8 ) The long hole 81 of the main body case 1 restricts the movement range of the knob 63 to a range in which the lock piece 61 does not escape from the cut-out annular groove 71.
In this case, the lock piece 61 can be prevented from escaping from the cut-out annular groove 71.

DESCRIPTION OF SYMBOLS 1 Main body case 2 Adapter 3 Attachment port 4 Shaft hole 5 Attachment part 6 Firing needle conduction shaft 7 Introduction part B High pressure gas container 8 Outer wall surface 9 Inner wall surface 10 Engagement mechanism 11 Display window 12 Lock mechanism D Outer diameter d Outer diameter 31 Protrusion 32 Recess 41 Protrusion 42 Recess 51 Marking
52 Needle 53 Seal plate
54 Support 61 Lock piece 62 Spring 63 Knob 71 Notch annular groove 72 Contact surface 73 End surface x Axis 74 Side surface 75 Side surface 81 Slot

Claims (8)

Includes the body case (1) and adapter (2),
The main body case (1) includes a mounting port (3) for the adapter (2),
The adapter (2) is attached portion of one end of the high-pressure gas container of the axial hole (4) the axial bore (4) in a tubular body provided with a (B) (5) at the other end firing pin transmission shaft (6 ) And the outer diameter (D) on the side of the mounting part (5) is larger than the outer diameter (d) on the side of the introduction part (7) ,
A bayonet-type engagement mechanism (10) is separately provided on the outer wall surface (8) on the introduction portion (7) side and the inner wall surface (9) of the mounting port (3),
The introduction part (7) side is provided with a display window (11) at a position that opens to the outside even when the adapter (2) is attached to the attachment port (3),
The main body case (1) is provided with a lock mechanism (12) for maintaining the engagement state of the engagement mechanism (10) at the attachment port (3), and a mechanism for attaching and detaching the main body case and the adapter.
The engagement mechanism (10) has a protrusion (31) on the outer wall (8) side of the mounting portion (5) and a recess (32) on the inner wall (9) side, and the protrusion (31) and the Each of the recesses (32) is opposed to a position shifted on the diameter and at an angle (θ) in which one of the recesses is in the circumferential direction, and can be engaged only at a specific relative position, and the display window (11) The body case / adapter attachment / detachment mechanism according to claim 1, wherein the attachment mechanism is opened in a specific direction when the engagement mechanism is engaged.
Engaging mechanism (10) has become the inner wall (9) side and the recess (42) in said outer wall surface (8) side projection (41) of the section with said mounting (5), said protrusion (41) the The recesses (42) are opposed to each other on a diameter and with each one having an outer peripheral length larger than the other outer peripheral length, and can be engaged only at a specific relative position, and the display window (11) The attachment / detachment mechanism for the main body case and the adapter according to claim 1, wherein the attachment is made in a specific direction when the engagement mechanism is engaged.
The display window (11) is configured so that the marker (51) provided with respect to the firing pin conduction shaft (6) can be visually recognized when the firing pin conduction shaft (6) moves in the introduction portion (7). The attachment / detachment mechanism for the main body case and the adapter according to claim 1, 2 or 3, wherein the used one of (B) is displayed.
The lock mechanism (12) is a lock piece (61) that protrudes onto the movement path of the protrusions (31, 41) of the adapter (2), and the lock piece (61) is connected to the axis of the attachment port (3) ( x) a spring (62 for pressing direction) and the locking piece (61) and bound knob (63) body case and adapter detaching mechanism according to claims 1 which is included in one of the sections 4.
The locking piece (61) has an annular shape, and an axial line (71) of the attachment port (3) is formed in the annular groove (71) formed concentrically with the attachment port (3) on the peripheral wall of the attachment port (3). x) is movably accommodated in the direction, and the protrusion (31, 41) abuts against the abutment surface (72) of the lock piece (61) by the press-fitting of the adapter (2) and pushes it in, followed by the rotation operation In the state of being detached from the corresponding contact surface (72), the spring (62) returns to the original position, and the end surface (73) in the bending direction engages with the side surface (74,75) of the projection (31,41). The attachment / detachment mechanism for the main body case and the adapter according to claim 5 , wherein the adapter (2) is prevented from returning.
The knob (63) is elastically engaged with the lock piece (61) from the outside of the main body case (1) through a long hole (81) bored in the main body case (1). the end surface of the lock piece (61) by movement of 63) to (73) removed from the side surfaces of the projections (31, 41) (74, 75), to allow the return of the projection (31, 41) The attachment / detachment mechanism for the main body case and the adapter according to claim 5 .
The elongated hole (81) of the main body case (1) restricts the movement range of the knob (63) to a range in which the lock piece (61) does not escape from the notched annular groove (71). 8. The attachment / detachment mechanism for the main body case and the adapter according to 7 .

Images