ejection device
By designing a sliding ejection device, multiple jigs can be unlocked sequentially, solving the problem of interference during the unlocking process and improving the unlocking efficiency of the jigs.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- SHENZHEN SHIZONG AUTOMATION EQUIP CO LTD
- Filing Date
- 2025-08-15
- Publication Date
- 2026-07-21
AI Technical Summary
Multiple jigs are prone to interference during the unlocking process, resulting in cumbersome and inefficient operation.
Design an ejection device including a base and multiple ejector components. Each ejector component can slide along the base. A reset structure drives the ejector components to reset sequentially, thereby enabling the individual unlocking of multiple fixtures and avoiding interference caused by simultaneous ejection.
The unlocking operation of multiple jigs has been simplified, the unlocking efficiency of jigs has been improved, and interference problems during the rotation of jigs have been avoided.
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Figure CN224526427U_ABST
Abstract
Description
Technical Field
[0001] This application belongs to the field of unlocking technology, and more specifically, relates to an ejection device. Background Technology
[0002] In some assembly processes, multiple jigs are typically used to clamp multiple components for assembly operations at the assembly station. For example, multiple jigs can be set up in pairs, with the two jigs in a group jointly clamping the components. These components can be hooks, screws, etc.
[0003] It should be noted that the fixture can rotate at the assembly station to switch between a clamping state and an unlocked state. In the clamping state, the fixture holds the parts. After the assembly operation of parts held by multiple fixtures is completed, it is generally necessary to rotate all the fixtures to the unlocked state so that the fixtures can clamp the parts again for the next assembly operation.
[0004] In some cases, an ejector device can be used to eject the fixture, causing it to rotate to the unlocked state for unlocking. However, in the clamped state, multiple fixtures may overlap. When the ejector device ejects all fixtures at once, interference may occur during their rotation, affecting their rotation and making unlocking difficult.
[0005] Therefore, by configuring the ejection device to move sequentially to multiple positions, and performing an ejection operation on only a portion of the fixture at each position, the unlocking operation of multiple fixtures can be achieved sequentially, thus improving the problem of interference between multiple fixtures during rotation. However, this makes the unlocking operation of multiple fixtures cumbersome and inefficient.
[0006] The above statements are for the purpose of providing background information in relation to this application only and do not necessarily constitute prior art. Utility Model Content
[0007] One of the objectives of this application is to provide an ejection device that can improve the problem of cumbersome and inefficient unlocking operations of multiple fixtures.
[0008] To solve the above-mentioned technical problems, the technical solution adopted in the embodiments of this application is as follows:
[0009] This application provides an ejection device, including:
[0010] Base;
[0011] Multiple ejector components are mounted on a base; each ejector component is configured to slide along the base to perform an ejection operation, and the multiple ejector components can slide relative to each other;
[0012] The reset structure is used to drive multiple ejector components to reset and slide; one end of the reset structure is connected to the base, and the other end of the reset structure is connected to multiple ejector components.
[0013] In some embodiments, the base is provided with a plurality of grooves, at least a portion of each ejector is confined within the groove and is used to slide along the groove.
[0014] In some embodiments, the base is a hollow structure that extends through the sliding direction of the ejector, the base is sleeved on the outer periphery of the plurality of ejectors, and the sliding groove is provided on the inner periphery of the base.
[0015] In some embodiments, the inner peripheral wall of the base is provided with a partition between two adjacent slides, the partition being used to separate two adjacent ejector members.
[0016] In some embodiments, the ejector includes a moving member and a protrusion disposed on the moving member. The moving member is disposed on a base and configured to slide along the base. The protrusion is used to slide with the moving member to perform the ejection operation.
[0017] In some embodiments, the ejector includes a plurality of protrusions spaced apart on the moving member, the plurality of protrusions being used to eject a plurality of fixtures respectively.
[0018] In some embodiments, the moving member is provided with a limiting portion, which is used to limit the moving member to the base along the reset direction of the ejector.
[0019] In some embodiments, the ejection device further includes a plurality of limiting members, each limiting member being sleeved outside each ejection member, and the limiting members and the base being spaced apart along the sliding direction of the ejection member.
[0020] In some embodiments, the reset structure is an elastic structure, which is sleeved outside the base and abuts against the base and multiple limiting members along the sliding direction of the ejector.
[0021] In some embodiments, the ejection device further includes a connecting shaft, the ejector is provided with a first through hole, and the limiting member is provided with second through holes on opposite sides of the ejector. The first through hole and the second through holes are arranged opposite to each other, and the connecting shaft passes through the first through hole and the two second through holes to fix the limiting member and the ejector.
[0022] The beneficial effects of the ejection device provided in this application embodiment are as follows:
[0023] The ejection device provided in this application embodiment has multiple ejector members on a base, each of which can slide along the base, and the multiple ejector members can slide relative to each other, so that each ejector member on the base can slide independently along the base. In this way, the multiple ejector members can be driven sequentially to perform ejection operations sequentially. Based on this, by sequentially driving the multiple ejector members of the ejection device to slide along the base to perform ejection operations, and each ejector member only ejecting a portion of the multiple fixtures, the multiple fixtures can be unlocked sequentially, thereby improving the problem of interference between multiple fixtures caused by simultaneous unlocking. Furthermore, by sequentially driving the multiple ejector members of the ejection device, the unlocking of multiple fixtures can be achieved sequentially, without needing to move the ejection device to multiple positions sequentially. After the ejection device completes the ejection operation, the reset structure can drive the multiple ejector members to reset, thus simplifying the unlocking operation of the ejection device for multiple fixtures and improving the unlocking efficiency of multiple fixtures.
[0024] The above description is only an overview of the technical solution of this application. In order to better understand the technical means of this application and to implement it in accordance with the contents of the specification, and to make the above and other objects, features and advantages of this application more obvious and understandable, the following are specific embodiments of this application. Attached Figure Description
[0025] To more clearly illustrate the technical solutions in the embodiments of this application, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.
[0026] Figure 1 A perspective structural diagram of the ejection device provided in some embodiments of this application;
[0027] Figure 2 for Figure 1 Exploded view;
[0028] Figure 3 A perspective view of the base of the ejection device provided in some embodiments of this application;
[0029] Figure 4 A perspective structural view of the ejector component of the ejection device provided in some embodiments of this application;
[0030] Figure 5 for Figure 1 A three-dimensional structural diagram of the ejection device from another perspective.
[0031] The following are the labeling elements in the figure:
[0032] 10-Base; 101-Slide groove; 11-Separation part; 20-Ejector; 201-First through hole; 21-Moving part; 211-Limiting part; 22-Protrusion; 30-Reset structure; 40-Limiting part; 401-Second through hole; 50-Connecting shaft; Y1-Ejection direction; Y2-Reset direction. Detailed Implementation
[0033] The embodiments of this application are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain this application, and should not be construed as limiting this application.
[0034] Unless otherwise specified, all implementation methods and optional implementation methods of the embodiments of this application can be combined with each other to form new technical solutions, provided that there is no conflict.
[0035] Unless otherwise specified, all technical features and optional technical features of the embodiments of this application can be combined with each other to form new technical solutions in the absence of conflict.
[0036] In the description of the embodiments of this application, it should be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.
[0037] 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 technical features indicated. Thus, a feature defined with "first" or "second" may explicitly or implicitly include one or more of that feature.
[0038] In the description of the embodiments of this application, "multiple" means two or more, and unless otherwise explicitly specified, "two or more" includes two. Correspondingly, "multiple groups" means two or more groups, including two groups.
[0039] In the description of the embodiments of this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "linking," "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. For those skilled in the art, the specific meaning of the above terms in this application can be understood according to the specific circumstances.
[0040] In the description of this application, the term "and / or" is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent three possibilities: A exists, A and B exist simultaneously, and B exists. Additionally, in this application, the character " / " generally indicates that the preceding and following related objects have an "or" relationship.
[0041] In the description of the embodiments of this application, unless otherwise expressly specified and limited, the technical terms "proximity" and "adjacent" refer to proximity in location. For example, among three components A1, A2, and B, if the distance between A1 and B is greater than the distance between A2 and B, then A2 is closer to B than A1, meaning A2 is adjacent to B. Alternatively, B can be said to be adjacent to A2; in other words, A2 is adjacent to B. Similarly, when there are multiple components C, namely C1, C2, ... CN, if one component C, such as C2, is closer to component B than the other components C, then B is adjacent to C2; in other words, C2 is adjacent to B.
[0042] Although this application has been described with reference to preferred embodiments, various modifications can be made thereto and components can be replaced with equivalents without departing from the scope of this application. In particular, the technical features mentioned in the various embodiments can be combined in any manner, provided there is no structural conflict. This application is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.
[0043] The following detailed description is provided in conjunction with specific accompanying drawings and embodiments:
[0044] Please see Figure 1 ,in, Figure 1This is a perspective structural diagram of an ejector device provided in some embodiments of this application. The ejector device provided in this application includes a base 10, a reset structure 30, and a plurality of ejector members 20. The plurality of ejector members 20 are all disposed on the base 10. Each ejector member 20 is configured to slide along the base 10 to perform an ejection operation. The plurality of ejector members 20 can slide relative to each other. The reset structure 30 is used to drive the plurality of ejector members 20 to reset and slide. One end of the reset structure 30 is connected to the base 10, and the other end of the reset structure 30 is connected to the plurality of ejector members 20.
[0045] Although the ejection device provided in this application embodiment was developed based on the problem of mutual interference between multiple jigs during the unlocking process, the ejection device can not only be used to eject jigs to unlock them, but also in other application scenarios that require ejection operations.
[0046] Ejector 20 refers to a component of the ejector device that can slide relative to the base 10.
[0047] Understandably, the sliding of the ejector 20 along the base 10 includes sliding of the ejector 20 along the ejection direction Y1 and sliding of the ejector 20 along the reset direction Y2. Specifically, when the ejector 20 slides along the base 10 along the ejection direction Y1, the ejector 20 performs an ejection operation, that is, the ejector 20 ejects the fixture. When the ejector 20 slides along the base 10 along the reset direction Y2, the ejector 20 performs a reset operation, that is, the ejector 20 disengages from the fixture along the reset direction Y2.
[0048] The ejection direction Y1 and the reset direction Y2 are opposite. The sliding direction of the ejector 20 mentioned below can be either the ejection direction Y1 or the reset direction Y2.
[0049] The ability of multiple ejector components 20 to slide relative to each other means that any one ejector component 20 can slide along the base 10 relative to the other ejector components 20. That is, each ejector component 20 can slide individually along the base 10, and multiple ejector components 20 can not slide along the base 10 simultaneously.
[0050] The reset structure 30 refers to the structure used to drive the ejector 20 to reset and slide. Specifically, the reset structure 30 is used to drive the ejector 20 to slide along the base 10 in the reset direction Y2, so that the reset structure 30 is reset. Specifically, the reset structure 30 is used to drive multiple ejector 20s to reset simultaneously. The reset structure 30 can be an elastic structure, or a mechanism that combines a cylinder, an electric cylinder, a motor and a screw mechanism, a mechanism that combines a motor and a gear rack, etc.
[0051] It should also be noted that the ejection device may further include a drive mechanism, which drives the ejector 20 along the ejection direction Y1, so that the ejector 20 slides along the base 10 in the ejection direction Y1 to perform the ejection operation. The drive mechanism may be a cylinder, an electric cylinder, a combination of a motor and a screw mechanism, a combination of a motor and a gear and rack mechanism, etc.
[0052] The ejection device provided in this embodiment of the application has multiple ejector members 20 on the base 10. Each ejector member 20 can slide along the base 10, and the multiple ejector members 20 can slide relative to each other, so that each ejector member 20 on the base 10 can slide independently along the base 10. In this way, the multiple ejector members 20 can be driven sequentially to perform ejection operations sequentially. Based on this, by sequentially driving the multiple ejector members 20 of the ejection device to slide along the base 10 to perform ejection operations, and each ejector member 20 only performs an ejection operation on a portion of the multiple fixtures, the multiple fixtures can be unlocked sequentially, thereby improving the problem of interference between multiple fixtures caused by simultaneous unlocking. Furthermore, by sequentially driving the multiple ejector parts 20 of the ejector device, multiple fixtures can be unlocked sequentially without having to move the ejector device to multiple positions in sequence. After the ejector device completes the ejection operation, the reset structure 30 can drive the multiple ejector parts 20 to reset, which simplifies the unlocking operation of the ejector device on multiple fixtures and helps to improve the unlocking efficiency of multiple fixtures.
[0053] In some embodiments, please refer to the following: Figures 1 to 3 ,in, Figure 2 for Figure 1 The exploded diagram, Figure 3 This is a perspective view of the base 10 of the ejector device provided in some embodiments of this application. The base 10 is provided with a plurality of grooves 101, at least a portion of each ejector 20 is confined within each groove 101 and is used to slide along the groove 101.
[0054] The base 10 has a groove 101, along which the ejector 20 slides. The groove 101 guides the sliding of the ejector 20, ensuring that the ejector 20 ejects the fixture precisely along the ejection direction Y1 and resets precisely along the reset direction Y2. This improves the stability of the ejection operation of the ejector 20.
[0055] In other embodiments, a groove 101 may be provided on the ejector 20, and at least a portion of the base 10 is confined within the groove 101 of the ejector 20. As the ejector 20 slides relative to the base 10, the base 10 slides relative to the ejector 20 along the groove 101.
[0056] In some embodiments, please refer to the following: Figures 1 to 3 The base 10 is a hollow structure that runs through the sliding direction of the ejector 20. The base 10 is sleeved on the outer periphery of the multiple ejector 20, and the sliding groove 101 is provided on the inner periphery of the base 10.
[0057] By using a hollow structure for the base 10 and fitting it around the periphery of the multiple ejector components 20, the base 10 can provide a stable limiting function for the multiple ejector components 20, thus improving the problem of the ejector components 20 detaching from the base 10.
[0058] Furthermore, by fitting the base 10 around the periphery of the multiple ejector components 20, all the ejector components 20 are located within the base 10, which improves the compactness of the multiple ejector components 20. This facilitates the ejection device in ejecting multiple compactly arranged fixtures.
[0059] In other embodiments, multiple grooves 101 may be respectively provided on the outer peripheral wall of the base 10.
[0060] In some embodiments, please refer to the following: Figures 1 to 3 The inner peripheral wall of the base 10 is provided with a partition 11 between two adjacent sliding grooves 101. The partition 11 is used to separate two adjacent ejector members 20.
[0061] Understandably, the inner peripheral wall of the base 10 is provided with a partition 11. Any two adjacent slides 101 are separated by a partition 11, which separates the two adjacent slides 101 so that the partition 11 separates the two adjacent ejector members 20.
[0062] The partition 11 separates two adjacent ejector members 20, making it easier for each ejector member 20 to slide independently along the base 10, thus improving the problem of interference when multiple ejector members 20 slide.
[0063] In some embodiments, please refer to the following: Figures 1 to 4 ,in, Figure 4 This is a perspective view of the ejector 20 of an ejection device provided in some embodiments of this application. The ejector 20 includes a moving member 21 and a protrusion 22 disposed on the moving member 21. The moving member 21 is disposed on a base 10 and configured to slide along the base 10. The protrusion 22 is used to slide with the moving member 21 to perform the ejection operation.
[0064] Specifically, at least a portion of the protrusion 22 protrudes from one end of the moving member 21 along the ejection direction Y1, so that the protrusion 22 can be used for ejection fixture to perform ejection operation.
[0065] The moving part 21 is the part of the ejector 20 that slides along the base 10, and the protrusion 22 is the part of the ejector 20 that ejects the fixture.
[0066] Understandably, on the same projection plane perpendicular to the sliding direction of the ejector 20, the orthographic projection of the moving member 21 extends beyond the periphery of the orthographic projection of the protrusion 22.
[0067] This configuration allows the ejector 20 to eject the fixture via the protrusion 22, ensuring that each ejector 20 can accurately eject the fixture that needs to be unlocked.
[0068] In some embodiments, please refer to the following: Figures 1 to 4 The ejector 20 includes a plurality of protrusions 22 spaced apart on the moving member 21, the plurality of protrusions 22 being used to eject a plurality of fixtures respectively.
[0069] This configuration allows multiple protrusions 22 on the ejector 20 to move synchronously when the ejector 20 slides along the base 10 in the ejection direction Y1, so that the multiple protrusions 22 on the ejector 20 can eject multiple fixtures at once, thereby improving the unlocking efficiency of multiple fixtures.
[0070] As an example, such as Figures 1 to 4 There are two ejector members 20, each including two protrusions 22. This allows the ejection device to unlock four fixtures. Specifically, one ejector member 20 can first slide along the ejection direction Y1, causing its two protrusions 22 to eject two fixtures respectively, thus unlocking those two fixtures. Then, the other ejector member 20 slides along the ejection direction Y1, causing the two protrusions 22 of both ejector members 20 to eject the remaining two fixtures respectively, thus unlocking those remaining two fixtures.
[0071] In some embodiments, please refer to the following: Figures 1 to 4 And in conjunction with other accompanying drawings. The moving member 21 is provided with a limiting part 211. The limiting part 211 is used to limit the ejector 20 to be positioned on the base 10 along the reset direction Y2 of the ejector 20.
[0072] Understandably, on the same projection plane perpendicular to the sliding direction of the ejector 20, the projection of the limiting part 211 extends beyond the projection of the slide groove 101.
[0073] This configuration allows the limiting portion 211 of the ejector 20 to rest on the base 10 along the reset direction Y2 when the ejector 20 slides along the base 10. This limits the travel distance of the ejector 20 along the reset direction Y2, thus improving the problem of the ejector 20 detaching from the base 10.
[0074] In some embodiments, please refer to the following: Figures 1 to 5 ,in, Figure 5 for Figure 1The provided ejector device is shown in a three-dimensional structural diagram from another perspective. The ejector device also includes multiple limiting members 40, each limiting member 40 being sleeved outside each ejector member 20, and the limiting members 40 and the base 10 being spaced apart along the sliding direction of the ejector member 20.
[0075] Understandably, the limiting member 40 and the ejector member 20 are fixedly connected; specifically, the limiting member 40 and the moving member 21 are fixedly connected. Thus, the limiting member 40 and the ejector member 20 can slide synchronously along the base 10.
[0076] By fitting the limiting member 40 outside the ejector 20, the drive mechanism can push the ejector 20 along the ejection direction Y1, or push the limiting member 40 along the ejection direction Y1 to realize the ejection operation of the ejector 20. This makes it easier for the drive mechanism to drive the ejector 20 to slide along the ejection direction Y1 to perform the ejection operation.
[0077] Understandably, the base 10 and the limiting member 40 are spaced apart along the reset direction Y2. By spaced apart along the sliding direction of the ejector 20, when the ejector 20 slides along the base 10 in the ejection direction Y1, the limiting member 40 can rest on the base 10 in the ejection direction Y1. This limits the sliding stroke of the ejector 20 in the ejection direction Y1, thereby improving the problem of the ejector 20 detaching from the base 10.
[0078] In some embodiments, please refer to the following: Figure 1 , Figure 2 and Figure 5 The reset structure 30 is an elastic structure. The reset structure 30 is sleeved outside the base 10, and the reset structure 30 abuts against the base 10 and multiple limiting members 40 along the sliding direction of the ejector 20.
[0079] The reset structure 30 can be a spring, tension spring, or other structure with elastic properties.
[0080] Understandably, one end of the reset structure 30 along the sliding direction of the ejector 20 abuts against the base 10, and the other end of the reset structure 30 along the sliding direction of the ejector 20 abuts against a plurality of limiting members 40.
[0081] By making the reset structure 30 an elastic structure, the structure of the reset structure 30 is very simple, and it can realize the reset of multiple ejector parts 20. Furthermore, the reset structure 30 is sleeved on the base 10, so that the base 10 can guide the elastic movement direction of the reset structure 30.
[0082] In some embodiments, please refer to the following: Figures 1 to 4The ejector device also includes a connecting shaft 50. The ejector 20 has a first through hole 201. The limiting member 40 has second through holes 401 on opposite sides of the ejector 20, with the first through hole 201 and the second through holes facing each other. The connecting shaft 50 passes through the first through hole 201 and the two second through holes 401 to fix the limiting member 40 and the ejector 20.
[0083] Understandably, along the through direction of the first through hole 201, the limiting member 40 is provided with second through holes 401 on opposite sides of the ejector member 20. That is, along the through direction of the first through hole 201, the limiting member 40 is provided with second through holes 401 at opposite ends of the first through hole 201. Both second through holes 401 are arranged opposite to the first through hole 201.
[0084] Specifically, the first through hole 201 is provided on the moving part 21.
[0085] The connecting shaft 50 refers to the connecting structure used to pass through the first through hole 201 and the two second through holes 401 to fix the limiting member 40 and the ejector member 20.
[0086] The connecting shaft 50 can be a bolt, screw, or other similar structure. When the connecting shaft 50 is a bolt, the second through hole 401 can be configured as a threaded hole. In addition, the first through hole 201 can also be configured as a threaded hole.
[0087] By adopting the above technical solution, the connecting shaft 50 passes through the first through hole 201 and the two second through holes 401, which can realize the fixed connection between the limiting member 40 and the ejector 20, thus facilitating the assembly and disassembly of the limiting member 40 and the ejector 20.
[0088] The above description is merely a preferred embodiment of this application and is not intended to limit this application. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this application should be included within the protection scope of this application.
Claims
1. An ejection device, characterized in that, include: Base; Multiple ejector components are disposed on the base; Each of the ejector components is configured to slide along the base to perform an ejection operation, and the plurality of ejector components are slidable relative to each other; A reset structure is used to drive the multiple ejector components to reset and slide; one end of the reset structure is connected to the base, and the other end of the reset structure is connected to the multiple ejector components.
2. The ejection device according to claim 1, characterized in that, The base is provided with a plurality of grooves, at least a portion of each ejector is confined within each groove and is used to slide along the groove.
3. The ejection device according to claim 2, characterized in that, The base is a hollow structure that extends through the sliding direction of the ejector. The base is sleeved on the outer periphery of the plurality of ejector members, and the groove is located on the inner periphery of the base.
4. The ejection device according to claim 3, characterized in that, The inner peripheral wall of the base is provided with a partition between two adjacent slides, the partition being used to separate two adjacent ejector members.
5. The ejection device according to any one of claims 1-4, characterized in that, The ejector includes a moving member and a protrusion disposed on the moving member. The moving member is disposed on the base and configured to slide along the base. The protrusion is used to slide with the moving member to perform an ejection operation.
6. The ejection device according to claim 5, characterized in that, The ejector includes a plurality of protrusions spaced apart on the moving member, and the plurality of protrusions are used to eject a plurality of fixtures respectively.
7. The ejection device according to claim 5, characterized in that, The moving part is provided with a limiting part, which is used to limit the ejector to the base along the reset direction of the ejector.
8. The ejection device according to any one of claims 1-4, characterized in that, The ejection device further includes multiple limiting members, each of which is sleeved outside the ejection member, and the limiting members and the base are spaced apart along the sliding direction of the ejection member.
9. The ejection device according to claim 8, characterized in that, The reset structure is an elastic structure, which is sleeved outside the base and abuts against the base and the plurality of limiting members along the sliding direction of the ejector.
10. The ejection device according to claim 8, characterized in that, The ejection device further includes a connecting shaft. The ejector is provided with a first through hole. The limiting member is provided with second through holes on opposite sides of the ejector. The first through hole and the second through holes are arranged opposite to each other. The connecting shaft passes through the first through hole and the two second through holes to fix the limiting member and the ejector.