Impact test release device

Abstract

The invention discloses an impact test release device, which belongs to the technical field of impact test equipment and comprises a release body, a release cylinder, a release piston, a communication seat and a locking assembly. A release body and a release piston are arranged in a release cylinder, a locking hole is formed in a communication base, a locking assembly capable of locking the release piston is arranged in the locking hole, high-pressure gas serves as a power source, the release piston is unlocked, the release piston is pushed by the high-pressure gas to move at a high speed, and the release piston is released. The releaser loaded with the tested object is pushed out of the release cylinder at a high speed to be released; meanwhile, the vent hole communicating with the locking hole and the releasing cylinder at the same time is formed in the communicating base, so that unlocking and releasing synchronization is achieved through the same air source, and the operation steps are simplified. The impact test release device is simple in structure, convenient to operate, high in reliability, capable of conducting impact tests of different test bodies and different impact conditions, wide in application range and good in application prospect and popularization value.

Description

Technical Field

[0001] The invention belongs to the technical field of impact test equipment, and in particular relates to an impact test release device. Background Art

[0002] With the advancement of science and technology, the use of electronic products is becoming more and more widespread in real life. During the use and transportation of electronic products, they may be subjected to various impacts, which may cause electronic equipment to malfunction or even be damaged. Therefore, the impact resistance of electronic products needs to be fully considered during the design and manufacturing process, and it should be used as an important indicator to detect the performance of electronic equipment.

[0003] In order to ensure the quality and reliability of products leaving the factory, it is necessary to design a test device to simulate the various impact forces that electronic equipment is subjected to during use to determine whether the test product can meet the high impact resistance requirements. Summary of the Invention

[0004] In response to one or more of the above-mentioned deficiencies or improvement needs in the prior art, the present invention provides an impact test release device that can simultaneously achieve unlocking and releasing of the impact test release device through the same air source.

[0005] To achieve the above-mentioned object, the present invention provides an impact test release device, which includes a release body, a release cylinder, a release piston, a communication seat and a locking assembly;

[0006] A release cavity with one end open is provided in the middle of the release cylinder, and a first through hole and a second through hole communicating with the release cavity are provided in sequence along the axial direction on the side wall of the release cylinder;

[0007] The release body is provided with a receiving cavity for placing the test sample, and at least a portion of the release body is provided in the release cavity and can move along the release cavity;

[0008] The release piston is sealed in the release chamber, disposed between the first through hole and the second through hole, and is movable along the release chamber;

[0009] The communication seat is sealed and fixed on the release cylinder, and includes a vent hole and a locking hole. One end of the vent hole is connected to the outside, and the other end is connected to the locking hole and the second through hole at the same time. The locking hole is connected to the first through hole.

[0010] The locking assembly is arranged in the locking hole, and includes an unlocking piston and a compression spring; the unlocking piston is sealed with the inner wall surface of the locking hole and can move along the inner wall surface of the locking hole, and one end of the unlocking piston extends from the first through hole into the release chamber, and abuts against the end surface of the release piston close to the release body to lock the release piston; an annular step is provided on the unlocking piston, and one end of the compression spring is compressed and abutted against the side of the annular step away from the release cylinder.

[0011] As a further improvement of the present invention, a plurality of communication seats are arranged at intervals along the outer circumference at one end of the release cylinder away from the opening, and the locking assembly is arranged in each of the communication seats.

[0012] As a further improvement of the present invention, two connecting seats are symmetrically arranged on the outer peripheral wall of the release cylinder, the vent hole on one connecting seat is connected to the installation pipe joint, and the vent hole on the other connecting seat is connected to the installation exhaust valve.

[0013] As a further improvement of the present invention, the locking assembly also includes an adjusting nut, which is threadedly connected to the inner wall of the locking hole at one end away from the release cylinder, the end of the compression spring away from the annular step abuts against the adjusting nut, and the end of the unlocking piston away from the release cylinder passes through the adjusting nut and extends out of the locking hole.

[0014] As a further improvement of the present invention, it also includes an end cover, which is sleeved on the release body and fixed at the opening of the release chamber, and the inner diameter of the end cover is smaller than the outer diameter of the release piston to limit the release piston in the release chamber.

[0015] As a further improvement of the present invention, a buffer pad is further provided in the release chamber near one end of the end cover to decelerate and buffer the release piston.

[0016] As a further improvement of the present invention, a plurality of balls are provided between the end cover and the release body, and rolling grooves are provided on the inner peripheral wall of the end cover corresponding to the balls, and the balls are partially accommodated in the rolling grooves.

[0017] As a further improvement of the present invention, a guide groove extending in the axial direction is provided on the outer wall of the release body, and the ball is partially accommodated in the guide groove.

[0018] As a further improvement of the present invention, an air cavity is provided at one end of the release piston away from the release body, and the air cavity is communicated with the release cavity.

[0019] As a further improvement of the present invention, one end of the release body is arranged in the release cavity, and the other end is arranged outside the release cavity, and the accommodating cavity is arranged at the end of the release body away from the release cavity, and the outer diameter of the release body close to the end of the accommodating cavity is larger than the inner diameter of the release cavity.

[0020] The above-mentioned improved technical features can be combined with each other as long as they do not conflict with each other.

[0021] In general, the above technical solutions conceived by the present invention have the following beneficial effects compared with the prior art:

[0022] (1) The impact test release device of the present invention is configured such that a release body and a release piston are arranged in a release cylinder, a locking hole is provided on a connecting seat, and a locking assembly capable of locking the release piston is provided in the locking hole, so that the release piston is unlocked by using high-pressure gas as a power source, and the release piston is pushed to move at high speed by the high-pressure gas, thereby pushing the release body carrying the test sample out of the release cylinder at high speed for release; at the same time, an air vent is provided on the connecting seat that is simultaneously connected to the locking hole and the release cylinder, so that unlocking and releasing are synchronized by the same air source, thereby simplifying the operation steps.

[0023] (2) The impact test release device of the present invention realizes a multi-stage locking function by arranging a plurality of connecting seats at intervals in an annular direction on the outer periphery of the release cylinder, and arranging a locking assembly in each connecting seat to lock the unlocking piston at the same time, thereby ensuring the reliability of locking the release piston.

[0024] (3) The impact test release device of the present invention provides an adjusting nut in the locking assembly to control the compression amount of the compression spring through the adjusting nut, thereby controlling the pressure of the high-pressure gas required to unlock the unlocking piston, thereby achieving control of the release acceleration of the release piston.

[0025] (4) The impact test release device of the present invention provides an end cap with an inner diameter smaller than the outer diameter of the release piston at the open end of the release cylinder to encapsulate the release piston in the release cylinder, thereby facilitating the reuse of the release piston. At the same time, a buffer pad is provided on the side of the release cylinder close to the opening to decelerate and buffer the release piston, thereby preventing the release piston from colliding with the end cap and being damaged, thereby increasing the repeated service life of the release piston.

[0026] (5) The impact test release device of the present invention realizes a sliding connection between the end cover and the release body by arranging balls in the end cover and the release body, so as to reduce the friction between the end cover and the release body when the release body is released; at the same time, a guide groove is arranged on the release body, and the ball portion is arranged in the guide groove, so that the movement of the release body is guided by the ball, thereby preventing the release body from axial rotation.

[0027] (5) The impact test release device of the present invention has a simple structure, is easy to operate, and has high reliability. It can perform impact tests on different test objects and under different impact conditions. It has a wide range of applications and has good application prospects and promotion value. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative work.

[0029] Figure 1 is a cross-sectional view of an impact test release device according to an embodiment of the present invention;

[0030] Figure 2 1 is a schematic structural diagram of a locking assembly in an impact test release device according to an embodiment of the present invention;

[0031] Figure 3 2 is a schematic diagram of the overall structure of the impact test release device according to an embodiment of the present invention;

[0032] In all the drawings, the same figure marks represent the same technical features, specifically: 1. release body; 101. accommodating chamber; 2. ball; 3. end cover; 4. buffer pad; 5. release cylinder; 501. release chamber; 502. back cover; 503. first through hole; 504. second through hole; 6. connecting seat; 601. locking hole; 602. vent hole; 7. compression spring; 8. adjusting nut; 9. unlocking piston; 901. locking end; 902. protruding end; 10. pipe joint; 11. release piston; 1101, air cavity; 12. seal; 13. exhaust valve; 14. test piece. DETAILED DESCRIPTION

[0033] In order to make the objectives, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only intended to illustrate the present invention and are not intended to limit the present invention. In addition, the technical features involved in the various embodiments of the present invention described below may be combined with each other as long as they do not conflict with each other.

[0034] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like to indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0035] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features being referred to. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "plurality" means at least two, such as two, three, etc., unless otherwise specifically defined.

[0036] In the present invention, unless otherwise specified or limited, the terms "installed," "connected," "connect," "fixed," etc. should be understood in a broad sense. For example, they can refer to fixed connection, detachable connection, or integration; mechanical connection, electrical connection; direct connection, or indirect connection through an intermediate medium; internal communication between two components, or interaction between two components, unless otherwise specified. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on specific circumstances.

[0037] In the present invention, unless otherwise expressly specified or limited, when a first feature is "above" or "below" a second feature, it may mean that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediary. Furthermore, when a first feature is "above," "above," or "above" a second feature, it may mean that the first feature is directly above or diagonally above the second feature, or simply means that the first feature is at a higher level than the second feature. When a first feature is "below," "below," or "below" a second feature, it may mean that the first feature is directly below or diagonally below the second feature, or simply means that the first feature is at a lower level than the second feature.

[0038] Example:

[0039] See also Figures 1 to 3The impact test release device in a preferred embodiment of the present invention includes a release body 1, a release cylinder 5, a release piston 11, a communication seat 6, and a locking assembly. One end of the release body 1 and the release piston 11 are disposed within the release cylinder 5, and an unlocking piston 9 is disposed within the communication seat 6. The release piston 11 is locked by the locking assembly. When high-pressure gas is introduced into the communication seat 6, the high-pressure gas pushes the locking assembly, unlocking the release piston 11. The high-pressure gas also pushes the unlocking piston 9, thereby releasing the release body 1 containing the test object 14 from the release cylinder 5.

[0040] Specifically, if Figure 1 and Figure 3 As shown in the figure, the release cylinder 5 in the preferred embodiment is a cylindrical structure, and a release chamber 501 is provided in the middle of the cylindrical structure along the axial direction. One end of the release chamber 501 is open, and the other end is fixedly connected to the back cover 502, and one end of the release chamber 501 is closed by the back cover 502, and a seal 12 is provided between the back cover 502 and the release cylinder 5 to seal one end of the release chamber 501.

[0041] At the same time, a first through hole 503 and a second through hole 504 communicating with the release chamber 501 are arranged in sequence along the axial direction on the side wall of the release cylinder 5, and the first through hole 503 is arranged on the side close to the opening to achieve communication with the communicating seat 6 through the first through hole 503 and the second through hole 504.

[0042] Furthermore, in the preferred embodiment, at least a portion of the release body 1 is disposed in the release chamber 501 and can move axially along the release chamber 501 . At the same time, a receiving chamber 101 for placing the test object 14 is provided in the release body 1 so as to impact the test object 14 by impacting the release body 1 .

[0043] like Figure 1 As shown in the figure, one end of the release body 1 is arranged in the release chamber 501, and the other end is arranged outside the release chamber 501, and the accommodating chamber 101 is arranged at the end of the release body 1 away from the release cylinder 5, and the outer diameter of the release body 1 close to the accommodating chamber 101 is larger than the inner diameter of the release chamber 501, forming a T-shaped release body 1 structure.

[0044] Of course, in the initial state, the release body 1 may be entirely accommodated in the release cavity 501 , or the accommodation cavity 101 may be provided at any position in the release body 1 .

[0045] Furthermore, the release piston 11 is sealed in the release chamber 501, as shown in FIG. Figure 1As shown in the figure, a seal 12 is provided between the release piston 11 and the inner wall of the release chamber 501 to achieve sealing between the release piston 11 and the release chamber 501; at the same time, the initial position of the release piston 11 is set between the first through hole 503 and the second through hole 504 on the side of the release body 1 close to the release cylinder 5, so as to push the release body 1 by pushing the release piston 11.

[0046] Preferably, an air cavity 1101 communicating with the release cavity 501 is provided at the end of the release piston 11 away from the release body 1, so as to increase the space of the release cavity 501 away from the release body 1, increase the volume of high-pressure gas that can be introduced, and thereby increase the driving force on the release piston 11 while reducing the weight of the release piston 11. Figure 1 As shown in , the air cavity 1101 is preferably configured as a groove with a trapezoidal cross section.

[0047] Furthermore, if Figure 2 As shown in the figure, the connecting seat 6 in the preferred embodiment is sealed and fixedly connected to the side wall of the release cylinder 5 by fasteners, and a locking hole 601 and a vent hole 602 are provided on the connecting seat 6, wherein one end of the vent hole 602 is connected to the outside world, and the other end is simultaneously connected to the locking hole 601 and the second through hole 504, and the locking hole 601 is connected to the first through hole 503.

[0048] like Figure 2 As shown in FIG, in order to achieve sealing between the communication seat 6 and the release cylinder 5, sealing members 12 are correspondingly provided at the connection between the first through hole 503 and the second through hole 504 and the communication seat 6.

[0049] Furthermore, the locking assembly in the preferred embodiment is arranged in the locking hole 601, and specifically includes an unlocking piston 9 and a compression spring 7, wherein the unlocking piston 9 is sealed with the inner wall surface of the locking hole 601 and can move along the inner wall surface of the locking hole 601. At the same time, one end of the unlocking piston 9 is extended from the first through hole 503 into the release chamber 501 as the locking end 901, and abuts against the end surface of the release piston 11 close to the release body 1 to lock the initial position of the release piston 11, prevent the release piston 11 from moving toward the side close to the release body 1, and release the lock of the release piston 11 by moving the unlocking piston 9 toward the side away from the release cylinder 5.

[0050] At the same time, an annular step is provided on the unlocking piston 9 , and one end of the compression spring 7 is compressed and abutted against the side of the annular step away from the release cylinder 5 , so as to provide a pre-tightening force for the unlocking piston 9 through the compression spring 7 .

[0051] Preferably, the locking assembly also includes an adjusting nut 8, which is threadedly connected to the inner wall of the locking hole 601 away from the release cylinder 5, and one end of the unlocking piston 9 serves as the protruding end 902 and passes through the adjusting nut 8 to extend out of the locking hole 601, and the end of the compression spring 7 away from the annular step abuts against the adjusting nut 8, so as to control the initial compression amount of the compression spring 7 by screwing the adjusting nut 8 and adjust the size of the preload force of the unlocking piston 9.

[0052] It can be understood that the greater the preload force, the greater the pressure of the high-pressure gas required for unlocking, which increases the high-pressure gas entering the release chamber 501 accordingly, and the greater the release acceleration obtained by the release piston 11. Therefore, the release acceleration of the release piston 11 can be controlled by controlling the initial compression amount of the compression spring 7.

[0053] During actual operation, high-pressure gas can be introduced into the locking hole 601 and the release chamber 501 through the vent 602, so that the unlocking piston 9 can be pushed by the high-pressure gas to overcome the preload force of the compression spring 7 and move to the side away from the release cylinder 5, thereby releasing the lock on the release piston 11. The high-pressure gas in the release chamber 501 can push the release piston 11 to move at high speed in the direction close to the release body 1, thereby pushing the release body 1 out of the release cylinder 5 at high speed.

[0054] Preferably, a plurality of connecting seats 6 are arranged at intervals in an annular direction on the outer periphery of the release cylinder 5, and an unlocking piston 9 is provided in each connecting seat 6, so as to realize multi-stage locking of the release piston 11 through the plurality of unlocking pistons 9, thereby ensuring the reliability of locking the release piston 11.

[0055] like Figure 1 As shown in the figure, two connecting seats 6 are arranged at intervals on the outer ring of the release cylinder 5 near one end of the back cover 502, and it is further preferred that the two connecting seats 6 are symmetrically arranged on both sides of the release cylinder 5; at the same time, locking components are provided in the two connecting seats 6, and the vent hole 602 of one of the connecting seats 6 is threadedly installed with a pipe joint 10, and is sealed with the pipe joint 10 by a seal 12, so as to be connected with the high-pressure air pipe through the pipe joint 10, and high-pressure gas is introduced into the vent hole 602; accordingly, the vent hole 602 of the other connecting seat 6 is connected to the exhaust valve 13, so that after the test is completed, the high-pressure gas in the device can be discharged through the exhaust valve 13.

[0056] Furthermore, an annular end cover 3 is fixedly provided at the open end of the release cylinder 5 away from the rear cover 502, and the inner diameter of the annular end cover 3 is larger than the outer diameter of the release body 1 near the end of the release cylinder 5, and smaller than the outer diameter of the release piston 11, so as to limit the release piston 11 in the release chamber 501 without affecting the movement of the release body 1, so that under the action of high-pressure gas, when the release piston 11 pushes the release body 1 out, it itself will not fly out, thereby facilitating the recycling of the release piston 11.

[0057] Preferably, a buffer pad 4 is further provided on the inner wall of the release chamber 501 at one end close to the end cover 3, one end of the buffer pad 4 abuts against the side wall of the end cover 3, and the inner diameter of the buffer pad 4 is smaller than the outer diameter of the release piston 11, so that when the release piston 11 moves near the end cover 3, the release piston 11 is decelerated and buffered by the buffer pad 4, thereby reducing the impact between the release piston 11 and the end cover 3, preventing the release piston 11 from being damaged due to impact, and ensuring that it has a reusable function.

[0058] Preferably, a plurality of balls 2 are disposed between the end cap 3 and the release body 1, and rolling grooves are provided on the inner circumferential wall of the end cap 3 corresponding to the balls 2. The balls 2 are partially accommodated in the rolling grooves, so that the rolling of the balls 2 within the rolling grooves achieves a sliding connection between the end cap 3 and the release body 1, thereby reducing friction between the release body 1 and the end cap 3 when the release body 1 moves. Further preferably, guide grooves extending axially corresponding to the circumferential positions of the balls 2 are provided on the outer wall of the release body 1, and the balls 2 are partially disposed in the guide grooves. The balls 2 guide the movement of the release body 1, thereby preventing unnecessary rotation of the release body 1 during longitudinal movement.

[0059] Furthermore, the specific working process of the impact test release device in the present invention is as follows:

[0060] (1) Place the test sample 14 in the receiving chamber 101 of the release body 1, connect the high-pressure gas pipe connected to the gas source to the pipe joint 10, and close the exhaust valve 13;

[0061] (2) Turn on the gas source switch, and the high-pressure gas enters the connecting seat 6 through the pipe joint 10, and is diverted through the vent hole 602 into the locking hole 601 and the release chamber 501;

[0062] (3) When the high-pressure gas in the locking hole 601 is greater than the preload of the unlocking piston 9, the high-pressure gas pushes the unlocking piston 9 to move away from the release piston 11, and the locking end 901 of the unlocking piston 9 retracts into the locking hole 601. At the same time, the lock on the release piston 11 is released. At the same time, the high-pressure gas in the release chamber 501 on the side of the release piston 11 away from the release body 1 pushes the release piston 11 to push the release body 1 out at high speed, completing the release operation of the impact test;

[0063] (4) Turn off the air source switch, open the exhaust valve 13, reinstall the release body 1 into the release cylinder 5, and return the release piston 11 to its original position. The unlocking piston 9 re-locks the release piston 11 under the restoring force of the compression spring 7, and the next test can be repeated.

[0064] It can be understood that after turning off the air source switch and opening the exhaust valve 13, the unlocking piston 9 will re-extend into the release cylinder 5 under the action of the restoring force of the compression spring 7. Therefore, when the release body 1 is re-installed into the release cylinder 5 and the release piston 11 returns to its original position, it is necessary to pull outward the protruding end 902 of the unlocking piston 9. After the release piston 11 returns to its original position, release the unlocking piston 9. The locking end 901 of the unlocking piston 9 re-extends into the release chamber 501 under the action of the restoring force of the compression spring 7, thereby completing the locking of the release piston 11.

[0065] The impact test release device of the present invention has a simple structure, convenient operation, and high reliability. It can carry out impact tests on different test objects and under different impact conditions, has a wide range of applications, and has good application prospects and promotion value.

[0066] It will be easily understood by those skilled in the art that the above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. An impact test release device, characterized in that: It includes a release body, a release cylinder, a release piston, a connecting seat and a locking assembly; A release cavity with one end open is arranged in the middle of the release cylinder, and a first through hole and a second through hole communicating with the release cavity are arranged in sequence along the axial direction on the side wall of the release cylinder; The release body is provided with a receiving cavity for placing the test product, and at least a part of the release body is arranged in the release cavity and can move along the release cavity; The release piston is sealably disposed in the release chamber, disposed between the first through hole and the second through hole, and is movable along the release chamber; The communication seat is sealed and fixed on the release cylinder, and comprises a vent hole and a locking hole, one end of the vent hole is connected to the outside, and the other end is connected to the locking hole and the second through hole at the same time, and the locking hole is connected to the first through hole; The locking assembly is arranged in the locking hole, and includes an unlocking piston and a compression spring; the unlocking piston is sealed with the inner wall surface of the locking hole and can move along the inner wall surface of the locking hole, and one end of the unlocking piston extends from the first through hole into the release chamber, and abuts against the end surface of the release piston close to the release body to lock the release piston; an annular step is provided on the unlocking piston, and one end of the compression spring is compressed and abutted against the side of the annular step away from the release cylinder.

2. The impact test release device according to claim 1, characterized in that: A plurality of the communication seats are arranged at intervals along the outer circumference at one end of the release cylinder away from the opening, and the locking assembly is arranged in each of the communication seats.

3. The impact test release device according to claim 2, characterized in that: Two connecting seats are symmetrically arranged on the outer peripheral wall of the release cylinder, the vent hole on one connecting seat is connected to the installation pipe joint, and the vent hole on the other connecting seat is connected to the installation exhaust valve.

4. The impact test release device according to any one of claims 1 to 3, characterized in that: The locking assembly also includes an adjusting nut, which is threadedly connected to the inner wall of the locking hole away from the release cylinder. The end of the compression spring away from the annular step abuts against the adjusting nut, and the end of the unlocking piston away from the release cylinder passes through the adjusting nut and extends out of the locking hole.

5. The impact test release device according to any one of claims 1 to 3, characterized in that: It also includes an end cover, which is sleeved on the release body and fixed at the opening of the release cavity. The inner diameter of the end cover is smaller than the outer diameter of the release piston, so as to limit the release piston in the release cavity.

6. The impact test release device according to claim 5, characterized in that: A buffer pad is also arranged in the release chamber near one end of the end cover to decelerate and buffer the release piston.

7. The impact test release device according to claim 5, characterized in that: A plurality of balls are arranged between the end cover and the release body, and rolling grooves are arranged on the inner peripheral wall of the end cover corresponding to the balls, and the balls are partially accommodated in the rolling grooves.

8. The impact test release device according to claim 7, characterized in that: A guide groove extending in the axial direction is arranged on the outer wall of the release body, and the ball portion is accommodated in the guide groove.

9. The impact test release device according to any one of claims 1 to 3 and 6 to 8, characterized in that: An air cavity is arranged at one end of the release piston away from the release body, and the air cavity is communicated with the release cavity.

10. The impact test release device according to any one of claims 1 to 3 and 6 to 8, characterized in that: One end of the release body is arranged in the release cavity, and the other end is arranged outside the release cavity, and the accommodating cavity is arranged at the end of the release body away from the release cavity, and the outer diameter of the end of the release body close to the accommodating cavity is larger than the inner diameter of the release cavity.

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