JP5852817B2 - Shock absorber - Google Patents

Description

  The present invention relates to a shock absorber used for buffering an opening / closing operation of a sliding door or the like.

  2. Description of the Related Art Conventionally, some devices that cushion opening and closing operations such as a sliding door in a house include a combination of an automatic pull-in device that is selected and combined with a linear damper or a rotary damper using hydraulic pressure. In such a device, for example, a pull-in device using a spring acts before the sliding door closes, and it is attenuated by a linear damper or a rotary damper to allow automatic pull-in and buffering.

  In this case, by adding a similar structure, automatic pull-in and buffering can be performed before the sliding door is fully opened.

  However, such a structure requires a pair of springs and dampers for each sliding door, which increases the weight, the number of parts, and is expensive.

JP 2007-120619 A

  The problem to be solved is that the weight, the number of parts are increased and the cost is increased if the structure is such that the automatic pulling and buffering are performed both before the sliding door is closed and before it is fully opened.

In order to reduce the weight, reduce the number of parts, and reduce the cost, the present invention provides a base attached to the movable side or the fixed side, and a collision portion formed on the fixed side or the movable side. A pair of linear guide portions linearly provided along the moving direction of the movable side on the base; and a stopper engaging portion formed corresponding to an outer end portion of the linear guide portion in the adjacent direction. A pair of movable pieces that are movably supported along the respective linear guide portions and are detachably held by the engaging portions, and are engaged with the fixed-side collision portions formed on the movable pieces. An engaging portion for releasing the locking by the locking portion when the magnetically or moving collision portion is engaged or magnetically attached and receives a moving force along the linear guide portion, and the pair of movable pieces Attach both movable pieces between the bodies along the straight part Includes a single spring biasing, and a single linear damper that attenuates the urging force of the pair of springs are interposed between the movable piece body, said linear guide unit is a linear guide hole, each The movable piece body includes a pair of pins that are fitted and guided in the linear guide holes, and the locking portion is continuously formed at the outer end portion in the side-by-side direction of the linear guide holes, and one pin of each movable piece body Is a locking guide hole that tilts and holds the movable piece body in an inclined state, the spring is provided along with the linear guide hole, and the linear damper is inserted into the linear guide hole with the spring interposed therebetween. It is characterized by the fact that it has been added .

  Since the present invention has the above-described configuration, bidirectional automatic pulling and buffering can be performed with a single spring and a single linear damper, reducing the weight, reducing the number of parts, and being inexpensive. A shock absorber can be obtained.

It is a front view of a shock absorber. (Example 1) (A) is before the collision with the fixed side, (b) is the start of the collision, (c) is withdrawn, (d) is withdrawn, and (e) is with the engagement. It is explanatory drawing which shows a return. (Example 1) It is operation | movement explanatory drawing of the door drawing-in unit with which the sliding door was mounted | worn. (Example 1) It is operation | movement explanatory drawing of the door drawing-in unit with which the sliding door was mounted | worn. (Example 1) It is operation | movement explanatory drawing of the door drawing-in unit with which the sliding door was mounted | worn. (Example 1) It is operation | movement explanatory drawing of the door drawing-in unit with which the sliding door was mounted | worn. (Example 1) It is operation | movement explanatory drawing of the door drawing-in unit with which the sliding door was mounted | worn. (Example 1) It is operation | movement explanatory drawing of the door drawing-in unit with which the opening part was mounted | worn. (Example 1) It is operation | movement explanatory drawing of the door drawing-in unit with which the opening part was mounted | worn. (Example 1) It is operation | movement explanatory drawing of the door drawing-in unit with which the opening part was mounted | worn. (Example 1) It is a top view of a buffer device. (Example 2) It is a front view showing the inside of a shock absorber. (Example 2) It is a side view of a shock absorber. (Example 2) (A) is before the collision with the fixed side, (b) is the start of the collision, (c) is withdrawn, (d) is withdrawn, and (e) is with the engagement. It is explanatory drawing which shows a return. (Example 2)

  A base, a linear guide part, a locking part, a pair of movable pieces, an engaging part, a single spring and a straight line with the purpose of reducing the weight, reducing the number of parts, and making it inexpensive. Realized by a damper.

[Buffer device]
FIG. 1 is a front view of the shock absorber.

  As shown in FIG. 1, the shock absorber 1 includes a base 3, a pair of guide portions 5, 7, a pair of movable piece bodies 9, 11, engagement recesses 13, 15, a single spring 17 and a linear damper 19. I have.

  The base 3 is made of metal, resin, or the like and is attached to the movable side. A plurality of fastening holes 21 for attachment are formed at a peripheral portion at predetermined intervals, and a damper support portion 22 is formed at the lower portion.

  The guide portions 5 and 7 include linear guide holes 23 and 25 as linear guide portions and locking guide holes 27 and 29 as locking portions, and the linear guide holes 23 and 25 are provided along the moving direction of the movable side. Has been. The locking guide holes 27 and 29 are provided as stoppers at outer ends of the linear guide holes 23 and 25 in the side-by-side direction. The locking guide holes 27 and 29 are orthogonal to the straight guide holes 23 and 25, and include inclined transition portions 27 a and 29 a between the straight guide holes 23 and 25.

  The movable piece bodies 9 and 11 are formed in a symmetrical shape, are movable and supported along the straight guide holes 23 and 25, respectively, and are inclined and held by the guides in the locking guide holes 27 and 29. Yes.

  That is, the movable piece bodies 9 and 11 are supported by the pins 31, 33, 35, and 37 so as to be movable along the linear guide holes 23 and 25, and when the pins 33 and 37 reach the locking guide holes 27 and 29, the pins are moved. Rotate around 31 and 35. By this rotation, the pins 33 and 37 are engaged with the locking guide holes 27 and 29, and the movable piece bodies 9 and 11 are inclined and held.

  In the movable piece bodies 9 and 11, the engagement recesses 13 and 15 are opened as rectangles in the direction intersecting the straight guide holes 23 and 25 at the upper edge in FIG. It is the structure engaged with a certain convex part mentioned later. When the movable piece bodies 9 and 11 move through the straight guide holes 23 and 25, the engagement concave portions 13 and 15 protrude from the upper edge portion 3 a of the base 3. In FIG. 1, fitting portions 39, 41, 43, 45 are formed below the movable piece bodies 9, 11.

  The single spring 17 and the single linear damper 19 are interposed between the pair of movable piece bodies 9 and 11.

  The single spring 17 is constituted by a tension coil spring, and is linearly disposed along the base 3 between the pair of movable piece bodies 9 and 11, and the coupling bodies 51 and 53 are attached to both ends. The distal ends of the coupling bodies 51 and 53 are spherical portions 51a and 53a, and are coupled to the fitting portions 39 and 43 of the movable piece bodies 9 and 11 so as to be relatively rotatable and capable of applying a tensile force.

The single linear damper 19 is a piston / cylinder type, and is disposed between the pair of movable pieces 9 and 11 in parallel with the spring 17 and linearly along the base 3. Combined bodies 55 and 57 are provided at the ends of the rod 19a and the cylinder 19b. The distal ends of the coupling bodies 55 and 57 are spherical portions 55a and 57a, and are coupled to the fitting portions 41 and 45 of the movable piece bodies 9 and 11 so as to be relatively rotatable and capable of giving a damping force.
[Mounting and retracting to the movable unit]
2A and 2B are diagrams for explaining the operation of the shock absorber. FIG. 2A shows a state before the collision with the fixed side, FIG. 2B shows the start of the collision, FIG. 2C shows the drawing, FIG. 2D shows the drawing back, and FIG. These are explanatory drawings which show engagement return.

  (A) The shock absorber 1 is attached to a movable unit that moves linearly, and moves linearly together with the movable unit with respect to the convex portion 61 of the fixed unit 59. At this time, the pins 33 and 37 are engaged and held so as to reach the locking guide holes 27 and 29, are rotated around the pins 31 and 35, and are in an inclined state, and the engaging concave portion of the movable piece body 9 (11). 13 (15) is directed and inclined in the traveling direction.

  (B) When the engaging concave portion 13 inclined of the shock absorber 1 collides with the convex portion 61 due to the movement of the movable side unit, the movable piece body 9 receives resistance from the convex portion 61 and applies a moving force along the straight guide hole 23. receive. At this time, the movable piece body 9 rotates around the pin 31, the pin 33 is removed from the locking guide hole 27, and both the pins 31 and 33 are in the guide state in the linear guide hole 23 of the guide portion 5.

  (C) When the pins 31 and 33 are in the guide state in the straight guide hole 23 of the guide portion 5, the movable piece body 9 can be linearly moved along the straight guide hole 23 of the guide portion 5. The collision force received by the body 9 is received by the linear damper 19 through the fitting portion 41, the coupling body 55, and the rod 19a by the linear movement of the movable piece body 9.

  At this time, when a force is transmitted from the coupling body 57 on the cylinder 19b side to the fitting portion 45 of the movable piece body 11, a force is transmitted from the pin 37 to the locking guide hole 29, and the movable piece body 11 remains as it is. Maintain posture.

  The linear damper 19 that receives the collision force absorbs the collision force as the movable piece body 9 moves, and at the same time, the movable piece body 9 pulls the pulling force in the direction of the movable piece body 11 from the spring 17 via the coupling bodies 51 and 53. receive.

  With this pulling force, the movable piece body 9 gently moves to the end of the straight guide hole 23 and is pulled in while receiving the resistance of the straight damper 19.

  (D) When the movable side unit moves in the opposite direction, the movable piece body 9 engaged with the convex portion 61 maintains the position as it is, so that the movable piece body 9 is moved to the linear guide hole 23 by the movement on the base 3 side. Relative to the locking guide hole 27 side. By this relative movement, the spring 17 and the linear damper 19 are extended.

  (E) When the movable side unit further moves in the reverse direction, the pin 33 moves to the locking guide hole 27 via the transition portion 27a, and the movable piece body 9 rotates around the pin 31 and tilts and holds the engagement. Is done.

  Due to the inclination of the movable piece body 9, the engaging concave portion 13 is detached from the convex portion 61, and the movable side unit can move freely.

The operations from (a) to (e) are similarly performed on the movable piece body 11 side due to the movement in the reverse direction and the relationship with the projection not shown.
[Mounting on sliding doors]
3-7 is explanatory drawing of operation | movement of the door drawing-in unit with which the sliding door was mounted | worn. In addition, in FIGS. 3-7, the door drawing-in unit is expanded and related drawing is shown.

  As shown in FIGS. 3 to 7, the sliding door 65 on the movable side is assembled to the opening 63 of the house on the fixed side, and the opening 63 can be opened and closed by sliding the sliding door 65 with respect to the opening 63. It has become.

  A fixed slide rail is attached to the opening 63, and a sliding door 65 is supported on the slide rail so as to be linearly movable. In the opening 1, fixed-side convex portions 61 a and 61 b are provided corresponding to the fully open position and the fully closed position of the sliding door 65. A door pull-in unit 67 configured with the shock absorber 1 is attached to the sliding door 65.

  3 corresponds to the operation explanation (c) of FIG. 2, and the engaging concave portion 13 of the movable piece body 9 is engaged with the convex portion 61 a of the opening 63, and the tensile force of the spring 17 causes the linear damper 19 to move. The movable piece body 9 gently moves to the end portion of the linear guide hole 23 while receiving resistance, and the sliding door 65 is drawn into the fully closed position.

  4 corresponds to the operation explanation (d) of FIG. 2, and when the sliding door 65 is opened and the door retracting unit 67 moves, the movable piece body 9 engaged with the convex portion 61a maintains the position as it is. The movable piece body 9 moves relative to the locking guide hole 27 side of the linear guide hole 23 along with the base 3 side that moves together with the sliding door 65. By this relative movement, the spring 17 and the linear damper 19 are extended.

  5 corresponds to the operation explanation (e) of FIG. 2, and when the door retracting unit 67 further moves in the opening direction together with the sliding door 65, the pin 33 moves to the locking guide hole 27 through the transition portion 27a, and the movable piece The body 9 rotates around the pin 31 and is tilted and held.

  Due to the inclination of the movable piece body 9, the engaging recess 13 is disengaged from the projection 61a, and the door retracting unit 67 can move freely.

  For this reason, the sliding door 65 can be freely opened in the fully open direction without receiving the drag of the spring 17 and the linear damper 19.

  6 corresponds to the operation explanation (b) of FIG. 2, and when the door retracting unit 67 is further moved in the fully open direction together with the sliding door 65, the inclined engaging recess 15 of the movable piece body 11 of the door retracting unit 67 is a convex portion. It collides with 61b. As a result of this collision, the movable piece body 11 receives resistance from the convex portion 61 b and rotates around the pin 35, while the pin 37 is disengaged from the locking guide hole 29 and both the pins 35 and 37 are in the linear guide hole 25 of the guide portion 7. It becomes a guide state.

  FIG. 7 corresponds to the operation explanation (c) of FIG. 2, and when the pins 35 and 37 are in the guide state in the straight guide hole 25 of the guide portion 7, the movable piece body 11 enters the straight guide hole 25 of the guide portion 7. The collision force received by the movable piece body 11 from the convex portion 61b is received by the linear damper 19 through the fitting portion 45, the coupling body 57, and the cylinder 19b by the linear movement of the movable piece body 11. .

  At this time, when the force is transmitted from the coupling body 55 on the rod 19a side to the fitting portion 41 of the movable piece body 9, the force is transmitted from the pin 33 to the locking guide hole 27, and the movable piece body 9 remains as it is. Maintain posture.

  The linear damper 19 that receives the collision force absorbs the collision force as the movable piece body 11 moves, and at the same time, the movable piece body 11 pulls the pulling force in the direction of the movable piece body 9 from the spring 17 through the coupling bodies 51 and 53. receive.

With this pulling force, the movable piece body 11 gently moves to the end portion of the linear guide hole 25 while receiving the resistance of the linear damper 19, and the sliding door 65 moves gently to the fully open state.
[Attachment to the opening]
8-10 is explanatory drawing of operation | movement of the door drawing-in unit with which the sliding door was mounted | worn. In addition, in FIGS. 8-10, the door drawing-in unit is expanded and related drawing is shown. In addition, a component is the same as FIGS. 3-7, attaches | subjects the same code | symbol, and abbreviate | omits the overlapping description.

  8 to 10, the shock absorber 1 is attached to the opening 63 that is the fixed side, and the convex portions 61 a and 61 b that serve as the movable-side collision portions correspond to the fully open position and the fully closed position of the sliding door 65. Is provided.

  FIG. 8 corresponds to FIG. 3, wherein the convex portion 61 a of the sliding door 65 is engaged with the engaging concave portion 13 of the movable piece body 9, and the resistance of the linear damper 19 is received by the tensile force of the spring 17. 9 moves gently through the straight guide hole 23 to its end, and the sliding door 65 is pulled into the fully closed position.

  When the sliding door 65 is opened and the convex portion 61a moves, the movable piece body 9 with which the convex portion 61a is engaged relatively moves toward the locking guide hole 27 side of the linear guide hole 23. By this relative movement, the spring 17 and the linear damper 19 are extended.

  9 corresponds to FIG. 5, when the convex portion 61 a further moves in the opening direction together with the sliding door 65, the pin 33 moves to the locking guide hole 27 through the transition portion 27 a, and the movable piece body 9 centers on the pin 31. Is rotated and tilted and held in engagement.

  Due to the inclination of the movable piece body 9, the convex portion 61a is detached from the engaging concave portion 13, and the door retracting unit 67 can be moved freely.

  For this reason, the sliding door 65 can be freely opened in the fully open direction without receiving the drag of the spring 17 and the linear damper 19.

  When the sliding door 65 further moves in the fully open direction, the convex portion 61 b collides with the inclined engaging concave portion 15 of the movable piece body 11 of the door retracting unit 67. As a result of this collision, the movable piece body 11 receives resistance from the convex portion 61 b and rotates around the pin 35, while the pin 37 is disengaged from the locking guide hole 29 and both the pins 35 and 37 are in the linear guide hole 25 of the guide portion 7. It becomes a guide state.

  FIG. 10 corresponds to FIG. 7, and when the pins 35 and 37 are in the guide state in the straight guide hole 25 of the guide portion 7, the movable piece 11 can move linearly along the straight guide hole 25 of the guide portion 7. The collision force received by the movable piece body 11 from the convex portion 61b is received by the linear damper 19 through the fitting portion 45, the coupling body 57, and the cylinder 19b by the linear movement of the movable piece body 11.

  At this time, when the force is transmitted from the coupling body 55 on the rod 19a side to the fitting portion 41 of the movable piece body 9, the force is transmitted from the pin 33 to the locking guide hole 27, and the movable piece body 9 remains as it is. Maintain posture.

  The linear damper 19 that receives the collision force absorbs the collision force as the movable piece body 11 moves, and at the same time, the movable piece body 11 pulls the pulling force in the direction of the movable piece body 9 from the spring 17 through the coupling bodies 51 and 53. receive.

With this pulling force, the movable piece body 11 gently moves to the end portion of the linear guide hole 25 while receiving the resistance of the linear damper 19, and the sliding door 65 moves gently to the fully open state.
[Effect of Example 1]
The shock absorber 1 according to the first embodiment of the present invention includes a base 3 attached to the sliding door 65 or the opening 63, convex portions 61 a and convex portions 61 b formed on the opening 63 or the sliding door 65, and movement of the sliding door 65 to the base 3. A pair of guide portions 5 and 7 each provided with linear guide holes 23 and 25 along the direction and provided with locking guide holes 27 and 29 for stoppers at the outer ends of the linear guide holes 23 and 25, A pair of movable piece bodies 9 and 11 that are movable and supported along the straight guide holes 23 and 25 of the guide portions 5 and 7 and are inclined and held by the guides in the locking guide holes 27 and 29, respectively. Engaging recesses 13 and 15 that are formed in the bodies 9 and 11 and that open in a direction intersecting with the linear guide holes 23 and 25 and engage with the protrusions 61a and 61b of the opening 63 or the sliding door 65, and a pair of movable pieces It can be inserted between the body 9 and 11 A single spring 17 that urges the pieces 9 and 11 to be attracted along the straight guide holes 23 and 25 and a single spring that is interposed between the pair of movable pieces 9 and 11 and attenuates the urging force of the spring 17. One linear damper 19 was provided.

  Therefore, any of the movable piece bodies 9 and 11 can be attracted by the single spring 17 and the linear damper 19. Therefore, it is possible to perform automatic pull-in and buffering in both directions of the fully open position and the fully closed position of the sliding door 65, reduce the weight, reduce the number of parts, and obtain an inexpensive shock absorber.

11 to 14 relate to a second embodiment of the present invention, FIG. 11 is a plan view of the shock absorber, FIG. 12 is a front view showing the inside of the shock absorber, FIG. 13 is a side view of the shock absorber, FIG. 14 is an explanatory diagram of the operation of the shock absorber, (a) before the collision with the fixed side, (b) the start of the collision, (c) withdraw, (d) withdraw, (e) These are explanatory drawings which show engagement return. Note that the basic configuration is the same as that of the first embodiment, and A is assigned to the corresponding component, and redundant description is omitted.
[Buffer device]
As shown in FIGS. 11 to 14, the shock absorber 1 </ b> A includes a base 3 </ b> A, straight guide holes 23 </ b> A and 25 </ b> A that are a pair of straight guide portions, a pair of movable piece bodies 9 </ b> A and 11 </ b> A, and engaging convex portions 13 </ b> A and 15 </ b> A. One spring 17A and a linear damper 19A are provided.

  The base 3A is formed of metal, resin, etc., and is attached to the movable side. The base 3A is a closed cross-sectional structure of the top plate 3Aa, the side plates 3Ab, 3Ac, and the bottom plate 3Ad. It is closed. Both brackets 3Ae and 3Af are formed with fastening holes 21A for attachment.

  The straight guide holes 23A and 25A are formed in the top plate 3Aa.

  On the bottom plate 3Ad of the base 3A, step portions 27A and 29A are formed at both ends. The step portions 27A and 29A are formed as stoppers corresponding to the outer ends of the linear guide holes 23A and 25A in the side-by-side direction, and engage and hold the movable piece bodies 9A and 11A at this position.

  The movable piece bodies 9A and 11A are formed in a symmetrical shape, and the constricted portions 9Aa and 11Aa are movably supported along the straight guide holes 23A and 25A, respectively. The lower ends of the movable piece bodies 9A and 11A in the figure are formed flat and can slide on the bottom plate 3Ad. Check bodies 33Aa and 37Aa are supported at the lower ends of the movable piece bodies 9A and 11A, and are urged by check springs 33Ab and 37Ab. When the check bodies 33Aa and 37Aa fall into the stepped portions 27A and 29A by the urging of the check springs 33Ab and 37Ab, the movable piece bodies 9A and 11A are engaged and held in an upright state.

  In the movable piece bodies 9A and 11A, the engagement convex portions 13A and 15A project from the upper edge portion in FIG. 12 in the direction intersecting the straight guide holes 23A and 25A as the engagement portions, and are the collision portions on the fixed side. The magnetic body portion is configured to be magnetically attached. For this reason, magnets 13Aa and 15Aa are embedded in the engaging convex portions 13A and 15A.

  The single spring 17A and the single linear damper 19A are interposed between the pair of movable piece bodies 9A and 11A.

  The single spring 17A is constituted by a tension coil spring, and hook portions 17Aa and 17Ab at both ends are latched to the locking pins 9Ab and 11Ab of the pair of movable pieces 9A and 11A.

In the single linear damper 19A, the ends of the rod 19Aa and the cylinder 19Ab are coupled to the movable piece bodies 9A and 11A by screwing or the like. The arrangement relationship between the rod 19Aa and the cylinder 19Ab can be reversed.
[Mounting and retracting to the movable unit]
FIG. 14 is an explanatory diagram of the operation of the shock absorber, (a) before the collision with the fixed side, (b) the start of the collision, (c) withdraw, (d) withdraw, (e) These are explanatory drawings which show engagement return.

  The operations in FIGS. 14A to 14E correspond to the operations in FIGS. 2A to 2E in the first embodiment. Reference numerals not shown in FIG. 14 refer to FIGS.

  (A) The shock absorber 1A is attached to a movable unit that moves linearly, and moves linearly together with the movable unit relative to the magnetic collision portion 61A of the fixed unit 59A. At this time, the check bodies 33Aa and 37Aa of the movable piece bodies 9A and 11A are engaged and held by the step portions 27A and 29A through the urging force of the check springs 33Ab and 37Ab.

  (B) When the engaging convex portion 13A of the shock absorber 1A collides with the collision portion 61A due to the movement of the movable side unit, the movable piece body 9A receives resistance from the collision portion 61A and receives a moving force along the linear guide hole 23A. . At this time, the check body 33Aa of the movable piece body 9A is retracted against the urging force of the check spring 33Ab, so that it is detached from the stepped portion 27A and can slide on the bottom plate 3Ad.

  (C) When the check body 33Aa is disengaged from the step portion 27A, the movable piece body 9A can move linearly along the straight guide hole 23A, and the collision force received by the movable piece body 9 from the collision portion 61A is the movable piece body 9A. Is received by the linear damper 19A.

  The linear damper 19A receiving the collision force absorbs the collision force as the movable piece body 9A moves, and at the same time, the movable piece body 9A receives a pulling force in the direction of the movable piece body 11A from the spring 17A.

  With this pulling force, the movable piece body 9A gently moves to the end portion of the straight guide hole 23A while receiving the attenuation of the straight damper 19A, and generates a pulling force. At this time, the end portion of the straight guide hole 23A also serves as a stopper when retracted. Similarly, the end portion of the linear guide hole 25A also serves as a stopper when the movable piece body 11A is retracted.

  (D) When the movable side unit moves in the reverse direction, the movable piece body 9A magnetically attached to the collision part 61A maintains its position, so that the movable piece body 9A moves toward the bracket 3Ae by moving the base 3A side. Move relative. With this relative movement, the spring 17A and the linear damper 19A extend.

  (E) When the movable unit further moves in the reverse direction, the movable piece body 9A comes into contact with the bracket 3Ae, and the check body 33Aa falls into the stepped portion 27A by the urging force of the check spring 33Ab and is held in engagement.

  By engaging and holding the movable piece body 9A, the engaging convex portion 13A is detached from the collision portion 61A, and the movable side unit can move freely.

  The operations from (a) to (e) are similarly performed on the movable piece body 11A side due to the movement in the reverse direction and the relationship with the collision unit (not shown).

  Therefore, this embodiment can also be applied to the sliding door of the opening as in FIGS. 3 to 7, and the same effects can be obtained. Further, the base 3A has a closed cross-sectional structure, and even if there is a liquid leak from the linear damper 19A, the outflow to the outside can be regulated.

  The shock absorber 1A according to the second embodiment can also be attached to the fixed side unit 59A that is the fixed side, and the magnetic collision portion 61A can be formed on the movable side unit, as shown in FIGS.

1, 1A shock absorber 3, 3A base 9, 9A, 11, 11A movable piece 17, 17A spring 19, 19A linear damper 23, 23A, 25, 25A linear guide hole (straight guide portion)
27, 29 Locking guide hole (engagement part)
27A, 29A Step part (engagement part)

Claims (4)

A base attached to the movable side or the fixed side;
A collision portion formed on the fixed side or the movable side;
A pair of linear guide portions linearly provided along the moving direction of the movable side on the base;
A locking portion for a stopper formed corresponding to the outer end portion in the side-by-side direction of the linear guide portion,
A pair of movable pieces that are movable supported along the linear guide portions and are releasably held by the locking portions;
The locking piece formed on each movable piece body is engaged or magnetically attached to the fixed-side collision portion, or the movable-side collision portion is engaged or magnetically attached and receives a moving force along the linear guide portion. An engaging portion for releasing the locking by the portion;
A single spring interposed between the pair of movable pieces and biasing both movable pieces so as to be attracted along the linear portion;
A single linear damper that is interposed between the pair of movable pieces and attenuates the urging force of the spring;
With
The linear guide portion is a linear guide hole,
Each movable piece body includes a pair of pins fitted and guided in the linear guide hole,
The locking portion is a locking guide hole that is continuously formed at the outer end portion of the linear guide hole in the side-by-side direction, and causes one pin of each movable piece body to fall down to incline and hold the movable piece body. Yes,
The spring is provided in the linear guide hole,
The linear damper is provided in the linear guide hole with the spring interposed therebetween,
A shock absorber characterized by that. The shock absorber according to claim 1,
The engagement portion is an engagement recess formed in each movable piece body and opening in a direction intersecting the linear guide hole and engaging with the collision portion on the fixed side or the movable side.
A shock absorber characterized by that. The shock absorber according to claim 1,
The engaging portion is an engaging convex portion that is formed on each movable piece body and protrudes in a direction intersecting the linear guide hole, and is magnetically attached to the fixed-side or movable-side collision portion.
A shock absorber characterized by that. The shock absorber according to claim 1,
The base is attached to a sliding door or opening provided in the opening,
A pair of the collision parts are provided on the opening or sliding door corresponding to the fully open side and the fully closed side of the opening in the moving direction of the sliding door,
A shock absorber characterized by that.

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