JP2020056829A - Automatic injection training device - Google Patents

Abstract

To provide an automatic injection training device which gives a user an audible feedback when an operation is started and is ended.SOLUTION: The present invention includes: a cylindrical body member 1; a plunger 4 arranged in the body member 1, the plunger being movable in a front-back direction; and a first coil spring 5 for biasing the plunger 4 to the front. The plunger 4 is fixed in the back position in the body member 1 against the biasing force of the first coil spring 5 before the automatic injection training device is used. A starting sound is issued when the plunger 4 starts moving in association with cancellation of fixation of the plunger 4, and an ending sound is issued when the movement of the plunger 4 is ended.SELECTED DRAWING: Figure 1

Description

  The present invention relates to an automatic injection training device.

  In some cases, a patient himself performs injection at home or the like using an automatic injection device to administer a drug for treating a disease. Prior to initiating such treatment, healthcare professionals need to teach patients how to use the automatic injection device. As a device used at that time, an automatic injection training device is known. The automatic injection training device differs greatly from the automatic injection device in that it does not have a needle and a drug solution. The shape and operation method of the automatic injection training device are configured similarly to the automatic injection device actually used for the purpose. By using the automatic injection training device, the patient can repeatedly train the operation method of the automatic injection device and become accustomed to the operation.

  As an automatic injection training device, for example, Patent Literature 1 discloses an automatic injection training device capable of providing audible feedback imitating a sound generated by a normal injection device at the start of penetration.

JP-T-2015-532466A

  However, Patent Document 1 does not disclose any specific configuration for realizing audible feedback. In particular, it is desirable to provide audible feedback to the user at both the start and end of operation of the automatic injection training device.

  It is an object of the present invention to provide an automatic injection training device that provides audible feedback to a user at both the start and end of an operation.

  According to one aspect of the present invention, a method includes using a cylindrical main body member, a plunger arranged to be able to move back and forth within the main body member, and a first elastic member for urging the plunger forward. In the previous state, the plunger is locked at a rear position in the main body member against the urging force of the first elastic member, and the movement of the plunger is started by releasing the locking of the plunger. An automatic injection training apparatus is provided, in which a start sound is emitted and an end sound is emitted when the movement of the plunger is completed.

  The plunger may have a first collision portion, and the start sound may be emitted when the first collision portion collides with a second collision portion provided in the main body member. The first collision portion may be a concave portion provided on an outer surface of the plunger. The engagement of the plunger may be performed by the recess. A collision member disposed so as to be able to move back and forth in the main body member, wherein the movement of the collision member is started with the movement of the plunger, and the collision member is provided in a third collision provided in the main body member. The end sound may be emitted by colliding with the unit. The collision member may be an annular member. A first protrusion is formed on an inner surface of the annular member, a second protrusion on a side surface of the plunger is formed, and the movement of the collision member is started by the cooperation of the first protrusion and the second protrusion. You may do so. A cylindrical barrel member may be further provided, so that frictional resistance is generated between an outer surface of the plunger and an inner surface of the barrel member when the plunger is moved.

  According to the aspect of the present invention, there is a common effect of providing an automatic injection training device that provides audible feedback to the user at both the start and end of the operation.

FIG. 1 is a longitudinal sectional view of a state before use of an automatic injection training device according to an embodiment of the present invention. FIG. 2 is a vertical cross-sectional view of the automatic injection training device at the start of operation. FIG. 3 is a longitudinal sectional view of a state after use of the automatic injection training device. FIG. 4 is a longitudinal sectional view of the main body member. FIG. 5 is an exploded view of the components in the main body member. FIG. 6 is an exploded view including a barrel member and a locking tube. FIG. 7 is a schematic side view of the plunger and the collision member. FIG. 8 is a partial longitudinal sectional view illustrating generation of a start sound. FIG. 9 is a partial vertical cross-sectional view illustrating the generation of the end sound. FIG. 10 is an exploded view of the initialization device of the automatic injection training device. FIG. 11 is a longitudinal sectional view before using the initialization device. FIG. 12 is a longitudinal sectional view after the use of the initialization device.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. Corresponding components are denoted by common reference symbols throughout the drawings.

  FIG. 1 is a longitudinal sectional view of the automatic injection training device 100 according to the embodiment of the present invention before use, and FIG. 2 is a vertical sectional view of the automatic injection training device 100 at the start of operation. 3 is a vertical cross-sectional view of the automatic injection training device 100 after use, FIG. 4 is a vertical cross-sectional view of the main body member, and FIG. 5 is an exploded view of the components in the main body member 1. FIG. 6 is an exploded view including the barrel member 2 and the locking tube 63, and FIG. 7 is a schematic side view of the plunger 4 and the collision member 22.

  The automatic injection training device 100 includes a cylindrical main body member 1 having an open end, a cylindrical barrel member 2 disposed in the main body member 1, a cylindrical plunger 4 having a piston 3 provided at a distal end, It has a first coil spring 5 as a first elastic member disposed inside the plunger 4, a lock mechanism 6, and a guide rod 7 fixed to the bottom of the main body member 1.

  When the automatic injection training device 100 operates, the piston 3 and the plunger 4 move toward the open end of the main body member 1 by the urging force of the first coil spring 5 as shown in FIGS. In the present specification, in the axial direction of the automatic injection training device 100, the direction in which the piston 3 and the plunger 4 advance during operation (the lower part in the figure) is defined as the “front” side, and the opposite side (the upper part in the figure) is defined as the “front” side. Defined as the "rear" side.

  Referring to FIG. 4, a first engagement protrusion 11 extending in the axial direction is formed on the inner surface of the main body member 1. A plurality of second engagement protrusions 12 projecting inward are formed on the inner surface of the front end of the main body member 1. A window hole 13 which is a substantially rectangular through hole is formed on the side surface of the main body member 1. A detachable cap may be arranged on the open end of the main body member 1.

  The piston 3 and the plunger 4 can move forward in the main body member 1, that is, in the barrel member 2 by the urging force of the first coil spring 5. The plunger 4 is disposed behind the barrel member 2 while compressing the first coil spring 5 in the state before use shown in FIG. The forward movement of the plunger 4 due to the urging force of the first coil spring 5 is locked by the lock mechanism 6 as described later. The guide rod 7 is disposed in the first coil spring 5 and is disposed in the plunger 4 in a state before use shown in FIG. The forward movement of the plunger 4 is guided by the guide rod 7.

  Referring particularly to FIG. 6, a first annular concave portion 21 is provided on an outer surface of a rear portion of the barrel member 2, and a collision member 22 which is an annular member is disposed in the first annular concave portion 21. In FIG. 6, the collision member 22 is drawn out of the first annular concave portion 21 for convenience. At the rear end of the barrel member 2, a plurality of first locking pieces 23 that can be elastically deformed inward and outward are provided. A first locking portion 231 is formed on the inner surface of each of the first locking pieces 23 as described later. A second coil spring 24 is disposed in the first annular recess 21 behind the collision member 22. A gap 211 extending in the axial direction is formed in the first annular concave portion 21. An engagement step 2111 which is a step facing rearward is formed in the gap 211.

  On the inner surface of the collision member 22, a third engagement projection 221 corresponding to the gap 211 is formed. The third engagement protrusion 221 can move back and forth in the gap 211. Therefore, the collision member 22 can move back and forth in the first annular recess 21 while the third engagement protrusion 221 is regulated by the gap 211. In the state before use shown in FIG. 1, the third engagement protrusion 221 is locked to the engagement step 2111 in the gap 211 while the collision member 22 compresses the second coil spring 24.

  Referring particularly to FIG. 7, a second annular recess 41 is formed on the outer surface of the plunger 4. On the outer surface of the plunger 4, a push projection 42 is formed behind the second annular recess 41, and a pull projection 43 is formed in front of the second annular recess 41. The push protrusion 42 and the pull protrusion 43 are separated from each other in the axial direction, and are arranged at positions shifted in the circumferential direction. In FIG. 7, the collision member 22 is drawn by a virtual line with the plunger 4 inserted. A first slope 2211 is formed at the rear end of the third engagement protrusion 221 of the collision member 22, and a first slope inclined in the same direction as the first slope 2211 is formed at the front end of the third engagement protrusion 221 of the collision member 22. Two slopes 2212 are formed. A third slope 421 corresponding to the first slope 2211 of the third engagement projection 221 is formed at a front end of the push projection 42 of the plunger 4, and a third engagement projection is formed at a rear end of the pull projection 43 of the plunger 4. A fourth inclined surface 431 corresponding to the second inclined surface 2212 of the second 221 is formed.

  The lock mechanism 6 includes a cylindrical pressing tube 61, a cylindrical regulating tube 62, a cylindrical locking tube 63, a third coil spring 64, a cylindrical cover member 65, and a fourth coil spring 66. And

  The barrel member 2 is accommodated inside the pressing tube 61 so as to be able to move back and forth. A through groove 611 extending in the axial direction is formed on the outer surface of the pressing tube 61. On the outer surface of the front end of the pressing tube 61, a fourth engaging projection 612 that is formed in a beam shape and that can be elastically deformed inward and outward is formed. On the outer surface of the cover member 65, a rectangular opening 651 corresponding to the fourth engagement projection 612 of the pressing tube 61 is formed. Since the fourth engagement protrusion 612 of the pressing tube 61 projects through the opening 651 of the cover member 65, the cover member 65 is fitted to the outer surface of the front end of the pressing tube 61 so as to be able to move back and forth. . A fourth coil spring 66 is arranged inside the cover member 65, and an urging force acts between the pressing tube 61 and the cover member 65. The cover member 65 partially projects from the open end of the main body member 1.

  The rear end of the pressing tube 61 accommodates the front end of the regulating tube 62 and is integrally attached to the regulating tube 62. The plunger 4 is housed inside the locking tube 63 in a state before use shown in FIG. The rear end of the locking tube 63 is fixed to the bottom of the main body member 1. The outer surface of the locking tube 63 is partially surrounded by the restriction tube 62. The restriction pipe 62 and the locking pipe 63 are arranged inside the third coil spring 64. The third coil spring 64 is disposed so as to urge the regulating tube 62 and thus the pressing tube 61 forward with respect to the bottom of the main body member 1.

  Referring to FIG. 6 in particular, a plurality of second locking pieces 631 that can be elastically deformed inward and outward are provided at the front of the locking tube 63. A second locking portion 6311 is formed on the inner surface of each of the second locking pieces 631. At the front end of each of the second locking pieces 631, a regulating portion 6312 formed to expand outward is provided.

  The generation of the start sound and the end sound will be described with reference to FIGS.

  FIG. 8 is a partial longitudinal sectional view illustrating generation of a start sound. FIG. 8A shows the state before use shown in FIG. 1, and the plunger 4 is locked by the lock mechanism 6. FIG. 8B shows a state immediately after the locking of the plunger 4 by the lock mechanism 6 is released.

  In FIG. 8A, the rear end of the barrel member 2 and the front end of the locking tube 63 are in contact. That is, the first locking piece 23 of the barrel member 2 enters inside the second locking piece 631 of the locking tube 63. The outside of the abutting portion between the barrel member 2 and the locking tube 63 is surrounded by the regulating tube 62. A first locking portion 231 is formed on an inner surface of the first locking piece 23. On the inner surface of the restriction tube 62, a front-facing restriction surface 621 that is in contact with the restriction portion 6312 of the second locking piece 631 of the locking tube 63 is formed. The first locking portion 231 of the first locking piece 23 and the second locking portion 6311 of the second locking piece 631 are fitted into the second annular recess 41 while abutting in the axial direction.

  The second locking piece 631 can be locked to the second annular recess 41, and more specifically, to the rear wall surface 411 of the second annular recess 41. At this time, a force that expands outward acts on the second locking piece 631 due to the component force due to the inclination of the contact surface between the second locking piece 631 and the second annular concave portion 41. However, the outward movement of the second locking piece 631 is restricted by the contact between the restricting portion 6312 and the restricting surface 621. As a result, the forward movement of the plunger 4 urged by the first coil spring 5 is locked by the lock mechanism 6.

  Further, in this state, the regulating pipe 62 is urged forward by the third coil spring 64. Therefore, the restricting surface 621 of the restricting tube 62 presses the second locking piece 631 inward by contact with the restricting portion 6312 of the locking tube 63. As a result, the second locking portion 6311 can be more strongly locked with the second annular concave portion 41.

  FIG. 8B shows a state immediately after the locking of the second locking piece 631 of the locking tube 63 with the second annular concave portion 41 of the plunger 4 is released. Referring to FIG. 1 together with FIG. 8, when using the automatic injection training device 100, the user grips the main body member 1 and presses the cover member 65 protruding from the main body member 1 against a target such as an arm. When the cover member 65 is pressed, the pressing tube 61 is pressed rearward via the cover member 65 and moves. When the pressing tube 61 moves rearward, the regulating tube 62 integrally attached to the pressing tube 61 moves rearward. As a result, the restriction on the outward movement of the second locking piece 631 due to the contact between the restricting portion 6312 of the locking pipe 63 and the restricting surface 621 of the restricting pipe 62 is released, and the second locking piece 631 is released. It becomes elastically deformable outward. When a component force that expands outward acts on the second locking piece 631, the second locking piece 631 separates from the second annular recess 41, and the second locking piece 631 moves to the second annular recess 41 of the plunger 4. The locking of the locking piece 631 is released. In other words, the locking of the plunger 4 by the lock mechanism 6 is released.

  At the moment when the locking of the plunger 4 by the lock mechanism 6 is released, the plunger 4 moves forward by the urging force of the first coil spring 5. At this time, the rear wall surface 411 in the second annular concave portion 41 as the first collision portion provided in the main body member 1 and the rear end portion of the barrel member 2 as the second collision portion, that is, the first locking The first locking portion 231 of the piece 23 collides, and a collision sound is generated (FIG. 8B). This collision sound is recognized by the user as the start sound of the automatic injection training device 100. Note that the second annular concave portion 41 of the plunger 4 elastically deforms the first locking piece 23 outward after generating a collision sound, and moves further forward.

  FIG. 9 is a partial vertical cross-sectional view illustrating the generation of the end sound. FIG. 9A shows a state before use shown in FIG. 9A, while the collision member 22 is urged forward by the second coil spring 24, the third engagement protrusion 221 of the collision member 22 is locked to the engagement step 2111 in the gap 211. I have.

  When the plunger 4 moves forward from the pre-use state shown in FIG. 1, the push projection 42 of the plunger 4 engages with the third engagement projection 221 of the collision member 22 projecting inward through the gap 211. Work together. That is, the third slope 421 of the push protrusion 42 is engaged with the first slope 2211 of the collision member 22, and the collision member 22 rotates around the axis by receiving a circumferential component force. That is, the collision member 22 rotates in a direction in which the engagement between the third engagement protrusion 221 and the engagement step 2111 is released. At the moment when the engagement between the third engagement protrusion 221 and the engagement step 2111 is released, the collision member 22 moves forward by the urging force of the second coil spring 24. At this time, the front end face of the collision member 22 collides with the front wall surface 212 in the first annular concave portion 21 which is the third collision portion provided in the main body member 1, and a collision sound is generated (FIG. 9 ( B)). This collision sound is recognized by the user as the end sound of the automatic injection training device 100.

  As described above, in the automatic injection training device 100, the user grasps the main body member 1 from the state before use shown in FIG. 1 and moves the main body member 1 against a target such as the abdomen, thigh, and upper arm. When the cover member 65 protruding from is pressed, a start sound is generated through the state at the start of the operation shown in FIG. Next, an end sound is generated, and when the user who recognizes the end sound releases the automatic injection training device 100 from the target, that is, releases the pressing, the state transits to the state shown in FIG. 3 as described later.

  The plunger 4 unlocked by the lock mechanism 6 moves forward inside the main body member 1 together with the piston 3. In the process of moving the plunger 4 forward, frictional resistance is generated between the outer surface of the plunger 4 and the second locking portion 6311 of the second locking piece 631. When the plunger 4 moves forward beyond the locking tube 63, in detail, when the rear end of the plunger 4 moves forward beyond the second locking portion 6311 of the second locking piece 631, the second engagement The stop piece 631 can be deformed inward. As a result, the restricting tube 62 deforms the second locking piece 631 inward by the urging force of the third coil spring 64, that is, the restricting portion 6312 of the second locking piece 631 and the inner surface of the restricting pipe 62. And moves forward together with the pressing tube 61 against the frictional resistance between them. Further, by forming the piston 3 with an elastic member, a frictional resistance is generated between the piston 3 and the inner surface of the barrel member 2 as the plunger 4 advances.

  As a result of these frictional resistances, the urging force of the first coil spring 5 is attenuated like a damper, and the advancing speed of the piston 3 is adjusted, so that the movement of the piston 3 simulating the delivery of a drug solution by an actual automatic injection device Is simulated. The user can visually recognize the movement of the piston 3 through the window 13 formed in the main body member 1. The forward movement of the pressing tube 61 and the regulating tube 62 is regulated by locking the rear part of the through groove 611 of the pressing tube 61 with the first engagement protrusion 11 of the main body member 1.

  When the user separates the automatic injection training device 100 from the target, that is, when the pressing is released, the urging force of the first coil spring 5 via the piston 3 and the application of the third coil spring 64 via the regulating pipe 62. The pressing tube 61 moves forward by the force. At this time, the fourth engagement projection 612 of the pressing tube 61 engages with the second engagement projection 12 of the main body member 1 and is elastically deformed inward. Almost simultaneously with the generation of the end sound, the fourth engagement protrusion 612 of the pressing tube 61 exceeds the second engagement protrusion 12 of the main body member 1 (FIG. 3). In other words, the positions and shapes of the second engagement protrusion 12 and the fourth engagement protrusion 612 are configured such that the fourth engagement protrusion 612 exceeds the second engagement protrusion 12. The elastically deformed fourth engagement projection 612 returns to its original shape the moment it exceeds the second engagement projection 12 of the main body member 1. Therefore, in the state after use shown in FIG. 3, the fourth engagement projection 612 is locked to the second engagement projection 12, and the pressing tube 61 and the cover member 65 cannot move rearward. Thereby, a mechanism similar to the mechanism for preventing reuse of a used injection needle in an actual automatic injection device can be reproduced.

  The automatic injection training device 100, unlike a real automatic injection device, must be able to be initialized (resettable) so that it can be used multiple times for training purposes. Therefore, the initialization device 8 of the automatic injection training device 100 will be described with reference to FIGS. Referring to FIGS. 11 and 12, the automatic injection training device 100 is inserted into the initialization device 8. In the axial direction of the initialization device 8, the direction in which the automatic injection training device 100 advances at the time of insertion (the lower part in the figure) is defined as the “front” side, and the opposite side (the upper part in the figure) is defined as the “rear” side. .

  FIG. 10 is an exploded view of the initialization device 8 of the automatic injection training device 100. FIG. 11 is a longitudinal sectional view before using the initialization device 8, and FIG. 12 is a longitudinal sectional view after using the initialization device 8.

  The initialization device 8 includes a cylindrical base member 81 having an open rear end, a vertical rod member 82, a compression tube 83, a fifth coil spring 84, and a pin 85. The base member 81 is configured so that the entire initialization device 8 can be made independent. The front end of the vertical rod member 82 is fixed to the bottom of the base member 81. A vertical hole 821 extending in the axial direction and penetrating to the opposite side is formed in the front half portion of the vertical rod member 82. The compression tube 83 has a through-hole at the front end to which a pin 85 can be attached. A flange 831 and two pressing plates 832 extending rearward from the flange 831 are formed at the rear of the compression tube 83.

  The vertical rod member 82 is inserted into the compression tube 83. At this time, the pin 85 is attached to the compression tube 83 via the vertical hole 821 of the vertical rod member 82. Therefore, the compression tube 83 can move back and forth within a range where the pin 85 is restricted by the vertical hole 821. The fifth coil spring 84 is disposed between the bottom of the base member 81 and the flange 831 of the compression tube 83, and urges the compression tube 83 backward.

  FIG. 11 is a longitudinal sectional view before using the initialization device 8, and FIG. 12 is a longitudinal sectional view after using the initialization device 8.

  When using the initialization device 8, first, the front end is inserted into the rear end of the placed initialization device 8 while holding the automatic injection training device 100. Specifically, the cover member 65 is inserted between the two pressing plates 832 in the base member 81, and the front end surface of the cover member 65 is brought into contact with the inner surface of the flange portion 831 of the compression tube 83. At this time, the pressing plate 832 is disposed so as to face the fourth engagement protrusion 612 of the pressing tube 61, and the vertical rod member 82 is inserted into the automatic injection training device 100 through the opening of the front end surface of the cover member 65. Inserted (FIG. 11).

  Next, the automatic injection training device 100 is pushed into the initialization device 8. As a result, the pressing plate 832 elastically deforms the fourth engaging protrusion 612 of the pressing tube 61 inward, and the engagement between the fourth engaging protrusion 612 and the second engaging protrusion 12 of the main body member 1 is released. You. As a result, it is possible to move the cover member 65 and, consequently, the pressing tube 61 backward.

  Next, when the automatic injection training device 100 is further pushed in, the piston 3 and the plunger 4 are pressed against the urging force of the first coil spring 5 and moved rearward by the vertical rod member 82 of the initialization device 8. When the plunger 4 moves rearward, the pulling projection 43 of the plunger 4 cooperates with the third engaging projection 221 of the collision member 22 projecting inward through the gap 211, while urging the second coil spring 24. The collision member 22 is moved rearward against the pressure. When the third engagement protrusion 221 of the collision member 22 moves rearward in the gap 211 until the third engagement protrusion 221 exceeds the engagement step 2111, the fourth slope 431 of the pull projection 43 engages with the second slope 2212 of the collision member 22. Then, the collision member 22 rotates around an axis by receiving a component force in the circumferential direction. That is, the collision member 22 rotates in a direction in which the third engagement protrusion 221 and the engagement step 2111 are locked. As a result, the collision member 22 returns to the initial position (FIG. 9A).

  Next, when the automatic injection training device 100 is further pushed in, the plunger 4 is further pressed by the vertical rod member 82 of the initialization device 8 and moves rearward. At this time, the pressing tube 61 and the regulating tube 62 move rearward against the urging force of the third coil spring 64, and furthermore, the barrel member 2 moves rearward by engaging with the inner surface of the pressing tube 61. The first locking piece 23 of the barrel member 2 that has moved backward enters the inside of the second locking piece 631 of the locking tube 63. At this time, the first locking portion 231 of the first locking piece 23 and the second locking portion 6311 of the second locking piece 631 are fitted into the second annular concave portion 41 of the plunger 4, and the initial position (FIG. 8). Return to (A)). As a result, the initialization of the automatic injection training device 100 is completed.

  According to the automatic injection training device 100, in a state before use, the plunger 4 is locked at a rear position in the main body member 1 against the urging force of the first coil spring 5, and the locking of the plunger 4 is released. When the movement of the plunger 4 starts, a start sound is emitted, and when the movement of the plunger 4 ends, an end sound is emitted. Thus, audible feedback can be provided to the user at both the start and end of the operation. Therefore, the user can recognize the operation state of the automatic injection training device 100, and can perform training of the automatic injection device with confidence. Further, since the automatic injection training device 100 can be easily initialized by the initialization device 8, the user can repeatedly train the automatic injection device.

  In the automatic injection training device, a tubular main body member, a plunger disposed so as to be able to move back and forth within the main body member, a first elastic member for urging the plunger forward, in a state before use, The plunger is locked at a rear position in the main body member against the urging force of the first elastic member, and a start sound is generated at the start of the movement of the plunger when the locking of the plunger is released, and the movement of the plunger ends. Any configuration can be adopted as long as the end sound is generated in accordance with. For example, in the above-described embodiment, the plunger 4 is locked by locking the plurality of second locking pieces 631 and the second annular concave portion 41. It may be an engagement with a concave portion that is not provided. Further, although the collision member 22 is an annular member, the collision member may be a C-shaped member instead of a complete ring. Further, the first collision portion of the plunger and the second collision portion in the main body member, which can generate the start sound, may be arbitrarily arranged. Furthermore, a third collision portion that can generate an end sound and collides with the collision member may be arbitrarily arranged.

  In the above-described embodiment, the start sound and the end sound are generated by the collision between the components. For example, in addition to the sound or in place of the sound, the start sound and the end sound are supplied by the contact between the components at the start and end of the operation. Then, another identification signal such as light or voice may be generated.

DESCRIPTION OF SYMBOLS 1 Main body member 2 Barrel member 3 Piston 4 Plunger 5 1st coil spring 6 Lock mechanism 7 Guide rod 8 Initialization device 11 1st engagement projection 12 2nd engagement projection 13 Window hole 21 First annular recess 22 Collision member 23 First 1 locking piece 24 second coil spring 41 second annular recess 42 push protrusion 43 pull protrusion 61 pressing tube 62 restricting tube 63 locking tube 64 third coil spring 65 cover member 66 fourth coil spring 81 base member 82 vertical rod member 83 compression tube 84 fifth coil spring 85 pin 100 automatic injection training device

Claims (8)

A cylindrical body member,
A plunger arranged to be able to move back and forth within the body member,
A first elastic member for urging the plunger forward,
In a state before use, the plunger is locked at a rear position in the main body member against a biasing force of the first elastic member,
A start sound is issued along with the movement start of the plunger by releasing the engagement of the plunger,
An automatic injection training device, wherein an end sound is issued when the movement of the plunger ends.   2. The automatic injection according to claim 1, wherein the plunger has a first collision portion, and the start sound is generated when the first collision portion collides with a second collision portion provided in the main body member. 3. Training equipment.   The automatic injection training device according to claim 2, wherein the first collision portion is a concave portion provided on an outer surface of the plunger.   The automatic injection training device according to claim 3, wherein the locking of the plunger is performed by the recess.   A collision member disposed so as to be able to move back and forth in the main body member, wherein the movement of the collision member is started with the movement of the plunger, and the collision member is provided in a third collision provided in the main body member. The automatic injection training device according to any one of claims 1 to 4, wherein the end sound is emitted by colliding with a part.   The automatic injection training device according to claim 5, wherein the collision member is an annular member.   A first protrusion is formed on an inner surface of the annular member, a second protrusion on a side surface of the plunger is formed, and the movement of the collision member is started by the cooperation of the first protrusion and the second protrusion. The automatic injection training device according to claim 6.   8. The apparatus according to claim 1, further comprising a cylindrical barrel member, wherein frictional resistance is generated between an outer surface of the plunger and an inner surface of the barrel member when the plunger is moved. 9. Automatic injection training device.

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