Circuit board plug-in extraction tool

Abstract

The utility model belongs to the technical field of equipment guarantee tools, and provides a circuit board plug-in extraction tool, which comprises an extraction unit, and the extraction unit comprises an extraction rod. The pulling-out assembly is arranged at the first end of the pulling-out rod, the pulling-out assembly is fixedly connected with the pulling-out rod, and the pulling-out assembly is provided with a clamping opening used for clamping an inserting piece to be pulled out; the supporting arm is arranged at the first end of the supporting rod, the first end of the supporting arm is connected with the supporting rod, and the second end of the supporting arm extends in the direction away from the bayonet, so that during pulling, acting force can be applied to the to-be-pulled plug-in by taking the supporting arm as a fulcrum. The circuit board plug-in extraction tool provided by the utility model can apply uniform and stable acting force to the plug-in.

Description

Technical Field

[0001] This utility model relates to the field of equipment support tools, specifically to a circuit board plug puller. Background Technology

[0002] In equipment maintenance, many specialized devices such as electrical, communication, and fire control equipment require frequent opening of their chassis for cleaning, maintenance, and inspection during repair and maintenance. These electrical devices consist of many internal components, including plug-in module boards and functional chips. During equipment inspection or maintenance, these plug-in boards need to be disassembled. Currently, this type of operation mainly involves using a wrench or simple pry tool to forcibly pull the plug-in boards out of the cabinet. This method of prying, due to uneven force applied during removal, can easily cause deformation or even damage to the plug-in boards. Utility Model Content

[0003] In view of the deficiencies in the prior art, the purpose of this utility model is to provide a circuit board plug-in puller to solve or alleviate one or more of the above-mentioned technical problems in the prior art, as well as one of the other technical problems.

[0004] To achieve the above objectives, this utility model provides a circuit board insertion puller, including a puller unit, wherein the puller unit includes:

[0005] Lifting lever;

[0006] A pull-out assembly is disposed at the first end of the pull-out rod, the pull-out assembly is fixedly connected to the pull-out rod, and the pull-out assembly has a latch for locking the plug to be pulled out; and

[0007] A support arm is provided at the first end of the support rod. The first end of the support arm is connected to the support rod, and the second end extends away from the bayonet, so that when pulling out, the support arm can be used as a fulcrum to apply force to the plug to be pulled out.

[0008] Furthermore, the pulling assembly includes two pulling arms, with the first end of each pulling arm fixedly connected to the pulling rod and the second end extending freely, and the bayonet formed between the two pulling arms.

[0009] Furthermore, the pull-out assembly also includes:

[0010] A connector, which is fixedly connected to the lifting rod, wherein the first end of the two lifting arms is connected to the lifting head, and the second end extends freely; and

[0011] A first adjustment mechanism is disposed on the connector head, and the first adjustment mechanism is used to adjust the distance between the two pull arms to change the width of the bayonet.

[0012] Furthermore, the first regulating mechanism includes:

[0013] A first socket is provided on the connector head, the first socket being adapted to the first end of the pull-out arm, and m such first sockets are provided, where m ≥ 3, and the m first sockets are arranged at intervals along the length direction of the connector head; and

[0014] A first locking structure is disposed on the connector head. The first locking structure has a lock state and an unlock state that can be switched between each other. When the first locking structure is in the locked state, the first locking structure can lock the puller arm in the corresponding first socket. When the first locking structure is in the unlocked state, the first locking structure releases the lock on the puller arm so that the puller arm can be separated from the connector head.

[0015] Furthermore, the first locking structure includes a first locking element, which is cylindrical. The connector is provided with a first insertion hole, and the puller arm is provided with a corresponding second insertion hole. The first insertion hole and the second insertion hole are adapted to the first locking element. The first locking element is movably inserted into the first insertion hole and the second insertion hole, and the first locking element is detachably connected to the connector.

[0016] Furthermore, the first end of the support arm is hinged to the lifting rod;

[0017] The circuit board insertion puller also includes a second adjustment component, which is disposed on the pull rod. The second adjustment component is used to adjust the angle between the support arm and the pull rod to change the position of the fulcrum.

[0018] Furthermore, the second adjustment component includes:

[0019] A telescopic adjusting rod, with its first end hinged to one of the support arm or the lifting rod, and its second end hinged to the other of the support arm or the lifting rod; and

[0020] A second locking mechanism is disposed on the adjusting rod. The second locking mechanism has a lock state and an unlock state that can be switched between each other. When the second locking mechanism is in the locked state, it locks the adjusting rod to keep it at its current length. When the second locking mechanism is in the unlocked state, it releases the lock on the adjusting rod so that the length of the adjusting rod can be changed.

[0021] Furthermore, the adjusting rod includes an inner rod and an outer rod coaxially sleeved outside the inner rod, and the outer rod is movably connected to the inner rod;

[0022] The second locking mechanism includes a second locking element, which is cylindrical. The inner rod is provided with a third insertion hole, and the outer rod is provided with a corresponding fourth insertion hole. The third insertion hole and the fourth insertion hole are adapted to the second locking element, and at least one of the third insertion hole and the fourth insertion hole is provided in multiples. The second locking element is inserted into the third insertion hole and the fourth insertion hole, and the second locking element is detachably connected to the adjusting rod.

[0023] Furthermore, there are two lifting units, and the second end of the lifting rod of the two lifting units is connected to the same operating handle.

[0024] Furthermore, at least one end of the operating handle is provided with a connecting screw, which is threadedly connected to the operating handle and / or the pulling rod.

[0025] The beneficial effects of this utility model are:

[0026] The circuit board plug puller provided by this utility model has a simple structure. It uses a bayonet to hold the plug to be pulled in order to apply force evenly to both sides of the plug. At the same time, it uses a support arm as a fulcrum to apply a stable force to the plug and also to save effort. Attached Figure Description

[0027] To more clearly illustrate the specific embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. In all the drawings, similar elements or parts are generally identified by similar reference numerals. In the drawings, the elements or parts are not necessarily drawn to scale.

[0028] Figure 1 This is a perspective view of the circuit board plug-in puller provided in Embodiment 1 of this utility model;

[0029] Figure 2 for Figure 1 An enlarged view of part A shown;

[0030] Figure 3 for Figure 1 The exploded view of part A shown;

[0031] Figure 4 This is a structural view of the circuit board plug-in puller assembly provided in Embodiment 2 of the present invention.

[0032] Figure 5 This is a structural view of the circuit board plug-in puller assembly provided in Embodiment 3 of this utility model.

[0033] Figure label:

[0034] 100. Pulling lever; 210. Pulling arm; 211. Second insertion hole; 220. Connector; 221. First insertion hole; 231. First socket; 232. First locking element; 233. Adjusting bolt; 300. Support arm; 400. Adjusting rod; 410. Inner rod; 411. Third insertion hole; 420. Outer rod; 421. Fourth insertion hole; 500. Second locking element; 600. Operating handle; 700. Connecting screw. Detailed Implementation

[0035] The embodiments of the present invention will now be described in detail with reference to the accompanying drawings. These embodiments are merely illustrative of the present invention and should not be construed as limiting the scope of protection of the present invention.

[0036] It should be noted that, unless otherwise stated, the technical or scientific terms used in this application shall have the ordinary meaning as understood by one of ordinary skill in the art to which this utility model pertains.

[0037] In the description of this application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0038] Furthermore, the terms "first," "second," etc., 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. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly defined.

[0039] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "joining," and "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. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0040] In this application, unless otherwise expressly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0041] like Figure 1-5 As shown, this utility model provides a circuit board plug-in puller, including a pull-out unit, which includes a pull-out rod 100, a pull-out assembly, and a support arm 300.

[0042] The pull-out assembly is installed at the first end of the pull-out rod 100 and is fixedly connected to the pull-out rod 100. The pull-out assembly has a locking slot for securing the plug-in to be pulled out. During pull-out, the plug-in is secured by the locking slot, allowing the pull-out rod 100 to apply force to the plug-in, thereby achieving the purpose of pulling out the plug-in. Furthermore, the locking slot secures both sides of the plug-in, allowing for simultaneous and uniform application of force to both sides of the plug-in.

[0043] A support arm 300 is disposed at the first end of the support rod. The first end of the support arm 300 is connected to the support rod, and the second end extends away from the bayonet, so that during pulling, the support arm 300 can be used as a fulcrum to apply force to the insert to be pulled. Preferably, in this embodiment, the support arm 300 is J-shaped, so that during pulling, the arc-shaped end of the support arm 300 can always make good contact with the pulling plane, thereby achieving the purpose of providing a stable fulcrum.

[0044] Specifically, firstly, the connector to be pulled out is secured using a locking mechanism; then, a force is applied to the pulling rod 100 with the support arm 300 as the fulcrum, thereby achieving the purpose of pulling out the connector. According to the torque balance formula F1L1=F2L2, the larger the lever arm, the less effort is required. Since the lever arm of the force applied to the support rod is greater than the lever arm of the frictional force between the connector and the circuit board, effort is saved during pulling out. Furthermore, using the support arm 300 as the fulcrum makes the force applied to the connector more stable, and the connector is evenly stressed on both sides simultaneously, thus avoiding damage to the connector.

[0045] like Figure 1-5 As shown, the lifting assembly includes two lifting arms 210. The first end of each lifting arm 210 is fixedly connected to the lifting rod 100, and the second end extends freely. A locking slot is formed between the two lifting arms 210. It should be noted that the two lifting arms 210 can be either two separate lifting arms 210 or two lifting arms 210 integrally formed on the same component. Further details will not be elaborated upon here.

[0046] like Figure 1-5 As shown, the pull-out assembly also includes a connector 220 and a first adjustment mechanism.

[0047] The connector 220 is fixedly connected to the puller 100. The first end of the two puller arms 210 is connected to the puller head, and the second end extends freely, thereby forming the aforementioned bayonet between the two puller arms 210. A first adjustment mechanism is provided on the connector 220. The first adjustment mechanism is used to adjust the distance between the two puller arms 210 to change the width of the bayonet, thereby achieving the purpose of being able to pull out plugs of various specifications (sizes).

[0048] Specifically, in use, the distance between the two lifting arms 210 is adjusted by the first adjustment mechanism so that the width of the bayonet is adapted to the size of the plug-in that needs to be lifted, thereby achieving the purpose of lifting plug-ins of various specifications (sizes) and thus improving the versatility of the entire device.

[0049] like Figure 1 , 2 As shown in Figures 1 and 3, in this embodiment, the first adjustment mechanism includes a first socket 231 and a first locking structure.

[0050] The first socket 231 is provided on the connector 220 and is adapted to the first end of the pull-out arm 210. There are m first sockets 231, where m ≥ 3, and these m first sockets 231 are arranged at intervals along the length of the connector 220. In use, the distance between the two pull-out arms 210 is changed by inserting them into two first sockets 231 at different distances.

[0051] In this embodiment, there are 8 first sockets 231, and the distance between any two adjacent first sockets 231 is equal to 3mm.

[0052] The first locking structure is provided on the connector 220. The first locking structure has a lock state and an unlock state that can be switched between each other. When the first locking structure is in the locked state, the first locking structure can lock the puller arm 210 in the corresponding first socket 231. When the first locking structure is in the unlocked state, the first locking structure releases the lock on the puller arm 210 so that the puller arm 210 can be separated from the connector 220.

[0053] Specifically, in use, depending on the size of the plug-in to be pulled out, the pull-out arm 210 is inserted into the corresponding first socket 231, and then the first locking structure is used to lock the pull-out arm 210, so as to achieve the purpose of pulling out the current plug-in.

[0054] like Figure 4 , 5 As shown, in other embodiments, the first adjustment mechanism includes an adjustment bolt 233, which is rotatably connected to the connector 220.

[0055] like Figure 4 As shown, when the adjusting bolt 233 is a reverse nut (i.e., the side wall of the adjusting bolt 233 has two external threads with opposite helical directions), the two lifting arms 210 are slidably connected to the connector 220, so that the two lifting arms 210 can move closer or further apart. The adjusting bolt 233 is threadedly connected to the two lifting arms 210. During adjustment, rotating the adjusting bolt 233 drives the two lifting arms 210 to move closer or further apart, thereby changing the distance between the two lifting arms 210 and thus changing the width of the bayonet.

[0056] like Figure 5 As shown, when the adjusting bolt 233 is a common bolt (i.e., the outer wall of the adjusting bolt 233 has only one external thread), one of the two lifting arms 210 is fixedly connected to the connector 220, and the other is slidably connected to the connector 220. To facilitate the description of the working principle of the first adjusting mechanism in this embodiment, we name the two lifting arms 210 lifting arm A and lifting arm B, respectively. Lifting arm A is fixedly connected to the connector 220, and lifting arm B is slidably connected to the connector 220, allowing lifting arm B to slide towards or away from lifting arm A. The adjusting bolt 233 is threadedly connected to lifting arm B. During adjustment, rotating the adjusting bolt 233 drives lifting arm B towards or away from lifting arm A, thereby changing the distance between the two lifting arms 210 and thus changing the width of the bayonet.

[0057] like Figure 1 , 2 As shown in Figure 3, the first locking structure includes a first locking element 232, which is cylindrical. The connector 220 is provided with a first insertion hole 221, and the pull arm 210 is provided with a corresponding second insertion hole 211. The first insertion hole 221 and the second insertion hole 211 are adapted to the first locking element 232. The first locking element 232 is movably inserted into the first insertion hole 221 and the second insertion hole 211, and the first locking element 232 is detachably connected to the connector 220.

[0058] Specifically, in one embodiment, the first end of the first locking element 232 is provided with a limiting portion. When locked, the first locking element 232 cannot pass through the first insertion hole 221 and the second insertion hole 211 due to the mutual cooperation between the side wall of the limiting portion and the side wall of the connector 220. The second end of the first locking element 232 is threadedly connected to the nut or the connector 220, thereby preventing both ends of the first locking element 232 from passing through the first insertion hole 221 and the second insertion hole 211. Specifically, in this embodiment, the second end of the first locking element 232 is threadedly connected to the nut. Due to the mutual cooperation between the nut and the side wall of the connector 220, both ends of the first locking element 232 cannot pass through the first insertion hole 221 and the second insertion hole 211.

[0059] or

[0060] The second end of the first locking element 232 is provided with a U-shaped pin. When locked, the U-shaped pin and the side wall of the connector 220 cooperate with each other, making it impossible for the second end of the first locking element 232 to pass through the first socket 221 and the second socket 211.

[0061] In other embodiments, both ends of the first locking element 232 are provided with U-shaped pins. When locked, the U-shaped pins cooperate with the sidewall of the connector 220, making it impossible for both ends of the first locking element 232 to pass through the first socket 221 and the second socket 211.

[0062] To unlock, the first locking element 232 is pulled out from the first socket 221 and the second socket 211 to release the lock on the lifting arm 210. To lock, the first locking element 232 is inserted into the first socket 221 and the second socket 211 in sequence to lock the lifting arm 210.

[0063] It should be noted here that when the cross-sections of the first socket 221, the second socket 211, and the first locking element 232 are non-circular (e.g., elliptical, polygonal, or star-shaped), the first locking element 232 and the connector 220 cannot rotate relative to each other due to the cooperation of the first socket 221 and the first locking element 232. Similarly, the puller arm 210 and the first locking element 232 cannot rotate relative to each other due to the cooperation of the second socket 211 and the first locking element 232. Therefore, in this case, only one first locking element 232 is required.

[0064] When the cross-sections of the first socket 221, the second socket 211, and the first locking element 232 are circular, if only one first locking element 232 is provided, when the torque applied to the first locking element 232 exceeds a preset value, the first locking element 232 and the connector 220 can rotate relative to each other. Similarly, when the torque applied to the lifting arm 210 exceeds a preset value, the lifting arm 210 and the first locking element 232 can also rotate relative to each other. Therefore, in this embodiment, at least two first locking elements 232 need to be provided. Preferably, two first locking elements 232 are provided to reduce the number of parts, thereby saving costs, and at the same time improving the efficiency of unlocking and locking.

[0065] like Figure 1 , 2 As shown in Figure 3, the first end of the support arm 300 is hinged to the lifting rod 100.

[0066] The circuit board insertion puller also includes a second adjustment component, which is disposed on the pull rod 100. The second adjustment component is used to adjust the angle between the support arm 300 and the pull rod 100 to change the position of the fulcrum, so that the fulcrum can adapt to different pull planes, thereby improving the versatility of the entire device.

[0067] like Figure 1 , 2 As shown in Figures 3 and 4, the second adjustment assembly includes an adjustment rod 400 and a second locking mechanism.

[0068] The adjusting rod 400 is telescopic, with its first end hinged to one of the support arm 300 or the lifting rod 100, and its second end hinged to the other. A second locking mechanism is provided on the adjusting rod 400, which has a switchable locked state and an unlocked state. When the second locking mechanism is in the locked state, it locks the adjusting rod 400 to maintain it at its current length. When the second locking mechanism is in the unlocked state, it releases the lock on the adjusting rod 400, allowing its length to be changed.

[0069] Specifically, the adjusting rod 400 includes an inner rod 410 and an outer rod 420, with the outer rod 420 sleeved on the inner rod 410 and movably connected to the inner rod 410.

[0070] The second locking mechanism includes a second locking element 500, which is cylindrical. The inner rod 410 has a third insertion hole 411, and the outer rod 420 has a corresponding fourth insertion hole 421. The third insertion hole 411 and the fourth insertion hole 421 are adapted to the second locking element 500, and at least one of the third insertion hole 411 and the fourth insertion hole 421 is provided in multiples. Figure 3 As shown, in this embodiment, there are multiple fourth sockets 421, while there is only one third socket 411.

[0071] The second locking element 500 is inserted into the third socket 411 and the fourth socket 421, and the second locking element 500 is detachably connected to the adjusting rod 400. When locked, the angle between the support arm 300 and the lifting rod 100 is changed by inserting the second locking element 500 into different fourth sockets 421 and third sockets 411.

[0072] Specifically, in this embodiment, the second locking element 500 is provided with U-shaped pins at both ends. When locked, the second locking element 500 cannot be pulled out from the third socket 411 and the fourth socket 421 due to the cooperation of the U-shaped pins and the adjusting rod 400.

[0073] In other embodiments, nuts are provided at both ends of the second locking element 500. When locked, the second locking element 500 cannot be pulled out from the third socket 411 and the fourth socket 421 due to the cooperation of the nuts and the adjusting rod 400.

[0074] or

[0075] The second locking element 500 has a limiting part at its first end and a U-shaped pin or nut at its second end.

[0076] like Figure 1 As shown, in this embodiment, two pulling units are provided. The second ends of the pulling rods 100 of the two pulling units are fixedly connected to the same operating handle 600. During pulling, the operating handle 600 is used to apply force to both pulling units simultaneously, thereby achieving the purpose of simultaneously pulling two plugs and improving the pulling efficiency.

[0077] Preferably, at least one of the two lifting units is detachably connected to the operating handle 600. During lifting, one of the lifting units can be detached and used independently to meet the needs of narrower protection environments, thereby improving the versatility of the entire device.

[0078] like Figure 1As shown, in this embodiment, at least one end of the operating handle 600 is provided with a connecting screw 700, which is threadedly connected to the operating handle 600 and / or the pulling rod 100. This allows one of the pulling units to be disassembled and used separately to meet the needs of narrower protection environments. At the same time, it also allows the distance between the two pulling units to be changed to meet the needs of pulling plugs at different distances, thereby further improving the versatility of the entire device.

[0079] Preferably, both ends of the operating handle 600 are provided with connecting screws 700 to increase the adjustment range of the distance between the two pulling units, thereby further improving the versatility of the entire device.

[0080] Numerous specific details are set forth in this specification. However, it will be understood that embodiments of this invention may be practiced without these specific details. In some instances, well-known methods, structures, and techniques have not been shown in detail so as not to obscure the understanding of this specification.

[0081] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and not to limit it. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this utility model, and they should all be covered within the scope of the claims and specification of this utility model.

Claims

1. A circuit board insertion / removal tool, characterized in that, Includes a pulling unit, the pulling unit comprising: Lifting lever; A pull-out assembly is disposed at the first end of the pull-out rod, the pull-out assembly is fixedly connected to the pull-out rod, and the pull-out assembly has a latch for locking the plug to be pulled out; and A support arm is provided at the first end of the support rod. The first end of the support arm is connected to the support rod, and the second end extends away from the bayonet, so that when pulling out, the support arm can be used as a fulcrum to apply force to the plug to be pulled out.

2. The circuit board insertion puller according to claim 1, characterized in that, The pulling assembly includes two pulling arms. The first end of each pulling arm is fixedly connected to the pulling rod, and the second end extends freely. A locking slot is formed between the two pulling arms.

3. The circuit board insertion puller according to claim 2, characterized in that, The pull-out assembly also includes: A connector, fixedly connected to the lifting rod, wherein the first ends of the two lifting arms are connected to the lifting head, and the second ends extend freely; and A first adjustment mechanism is disposed on the connector head, and the first adjustment mechanism is used to adjust the distance between the two pull arms to change the width of the bayonet.

4. The circuit board insertion puller according to claim 3, characterized in that, The first adjustment mechanism includes: A first socket is provided on the connector head, the first socket being adapted to the first end of the pull-out arm, and m such first sockets are provided, where m ≥ 3, and the m first sockets are arranged at intervals along the length direction of the connector head; and A first locking structure is disposed on the connector head. The first locking structure has a lock state and an unlock state that can be switched between each other. When the first locking structure is in the locked state, the first locking structure can lock the puller arm in the corresponding first socket. When the first locking structure is in the unlocked state, the first locking structure releases the lock on the puller arm so that the puller arm can be separated from the connector head.

5. The circuit board insertion puller according to claim 4, characterized in that, The first locking structure includes a first locking element, which is cylindrical. The connector is provided with a first insertion hole, and the puller arm is provided with a corresponding second insertion hole. The first insertion hole and the second insertion hole are adapted to the first locking element. The first locking element is movably inserted into the first insertion hole and the second insertion hole. The first locking element is detachably connected to the connector.

6. The circuit board insertion / removal device according to any one of claims 1-5, characterized in that, The first end of the support arm is hinged to the lifting rod; The circuit board insertion puller also includes a second adjustment component, which is disposed on the pull rod. The second adjustment component is used to adjust the angle between the support arm and the pull rod to change the position of the fulcrum.

7. The circuit board insertion puller according to claim 6, characterized in that, The second adjustment component includes: A telescopic adjusting rod, with its first end hinged to one of the support arm or the lifting rod, and its second end hinged to the other of the support arm or the lifting rod; and A second locking mechanism is disposed on the adjusting rod. The second locking mechanism has a lock state and an unlock state that can be switched between each other. When the second locking mechanism is in the locked state, it locks the adjusting rod to keep it at its current length. When the second locking mechanism is in the unlocked state, it releases the lock on the adjusting rod so that the length of the adjusting rod can be changed.

8. The circuit board insertion puller according to claim 7, characterized in that, The adjusting rod includes an inner rod and an outer rod coaxially sleeved outside the inner rod, and the outer rod is movably connected to the inner rod; The second locking mechanism includes a second locking element, which is cylindrical. The inner rod is provided with a third insertion hole, and the outer rod is provided with a corresponding fourth insertion hole. The third insertion hole and the fourth insertion hole are adapted to the second locking element, and at least one of the third insertion hole and the fourth insertion hole is provided in multiples. The second locking element is inserted into the third insertion hole and the fourth insertion hole, and the second locking element is detachably connected to the adjusting rod.

9. The circuit board insertion puller according to claim 1, 2, 3, 4, 5, 7 or 8, characterized in that, There are two lifting units, and the second end of the lifting rod of the two lifting units is connected to the same operating handle.

10. The circuit board insertion puller according to claim 9, characterized in that, At least one end of the operating handle is provided with a connecting screw, and the connecting screw is threadedly connected to the operating handle and / or the pulling rod.

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