An automatic assembly line for guitar capos

Abstract

The present invention provides an automatic assembly line for guitar capos, which relates to the field of musical instrument equipment assembly. The automatic assembly line for guitar capos includes a base platform, and also includes a position-changing working component and a spring clamping component installed on the base platform. The position-changing working component includes a turntable capable of rotating on the base platform and a plurality of limiting components installed on the turntable. The limiting components are used for placing the capos. The turntable can be controlled to rotate 45 degrees periodically on the base platform. The spring clamping component includes a rotary lifter installed on the base platform and a spring loader installed on the rotary lifter. For this automatic assembly line for guitar capos, by setting the spring clamping component, the effect of successful single clamping of the spring can be easily achieved. By setting the limiting components, the spring can be easily assembled and will remain in its original state after the spring is assembled, which is convenient for installing the pin in the later stage. By setting the turntable, the effect of assembly line processing can be achieved on one workbench.

Description

Technical Field

[0001] The invention relates to the field of musical instrument equipment assembly, in particular to an automatic assembly line for a guitar capo. Background Art

[0002] As we all know, the guitar capo is a commonly used auxiliary tool in guitar playing and singing. It is mainly used to adjust the pitch of the guitar. When changing the key, it can press the existing fret to raise the melody by the corresponding interval, so that it is coordinated with the singer's voice. Using the original fingering to play greatly reduces the difficulty of changing the key.

[0003] The guitar capo consists of a clamp handle, a clamp rod, a spring, rivets and a logo. The shapes of its various components are complex and not convenient for automated assembly. If it is assembled manually, the assembly speed will be reduced and the quality of the guitar capo will be affected, especially the installation of the spring. The spring needs to be in a compressed state during the assembly process, making the installation of the spring more difficult.

[0004] Existing patent: CN111136460B discloses an automatic assembly line for a guitar capo, including a rotating mechanism, a first feeding mechanism, a clamping rod assembly mechanism, a riveting mechanism, a logo assembly mechanism and a spring assembly mechanism. The first feeding mechanism, the clamping rod assembly mechanism, the riveting mechanism, the logo assembly mechanism and the spring assembly mechanism are circumferentially distributed beside the rotating mechanism. The clamping rod assembly mechanism includes a clamping rod assembly assembly and a rivet assembly assembly, and the rivet assembly assembly is located above the clamping rod assembly assembly. The logo assembly mechanism includes a glue dispenser and a logo assembly assembly, and the glue dispenser is located above the logo assembly assembly. The spring assembly mechanism includes a spring feeding assembly and a spring assembly assembly, and the spring assembly assembly is located above the spring feeding assembly.

[0005] The beneficial effect of the above invention is that it can automatically complete the assembly of the guitar capo, reduce manual labor, increase production speed, and improve product quality.

[0006] However, it is difficult to assemble by clamping the two ends of the spring. In the guitar capo, the spring is usually buckled on two pins at both ends. After shrinking it, it is difficult to insert it smoothly, so it is easy to cause problems such as spring detachment and assembly deviation during assembly. Summary of the Invention

[0007] In view of the deficiencies in the prior art, the present invention provides an automatic assembly line for a guitar capo, which solves the problems raised in the above background technology.

[0008] To achieve the above object, the present invention is realized through the following technical solutions: A guitar capo automatic assembly line includes a base, and further includes a position-changing working component and a spring clamping component installed on the base. The position-changing working component includes a turntable capable of rotating on the base and a plurality of limiting components installed on the turntable. The limiting components are used to place the capos. The turntable can be controlled to rotate 45 degrees periodically on the base;

[0009] The spring clamping component includes a rotary lifter installed on the base and a spring loader installed on the rotary lifter. The spring loader is used to install springs into the capos on the limiting components. The rotary lifter can achieve the function of lifting and the upper end can play the role of rotating;

[0010] A pin placer is also installed on the base for replenishing pins; a presser is also installed for loading pins.

[0011] Preferably, the spring loader includes a cross bar and two telescopic devices. The rotary lifter includes a telescopic rod and a rotary table. The telescopic rod is fixed to the base, and the rotary table is fixed to the upper end of the telescopic rod. The cross bar is fixed to the output end of the rotary table. The cross bar can rotate, and the rotary table is used to make the telescopic rod rotate 180 degrees each time.

[0012] Preferably, the spring clamping component further includes a spring feeder. The rotation of the cross bar can make the telescopic device correspond to the spring feeder to receive the springs fed by the spring feeder. The cross bar can also make the telescopic device drive the spring to rotate to the limiting component on the turntable. The spring feeder can release a spring regularly.

[0013] Preferably, the telescopic device includes a bottom rod and two groups of clamping blocks. The number of each group of clamping blocks is two. The two clamping blocks in any one group are connected by an electric lead screw to make the two clamping blocks approach each other. One of the two clamping blocks in any one group is installed in the bottom rod and is also connected by an electric lead screw. The electric lead screw can make the two clamping blocks in one group move relatively, and the other electric lead screw can make the two groups of clamping blocks move relatively;

[0014] Arc surfaces are provided on the mutually approaching surfaces of the two groups of clamping blocks, and threaded grooves are provided on the inner walls of the arc surfaces. The spring feeder can make the spring fall between the two groups of clamping blocks.

[0015] Preferably, the limiting component includes a sleeve, a core shaft, a top rod and a placement table. The placement table is fixed on the turntable, the sleeve is fixed at the bottom of the placement table and corresponds to the turntable. The core shaft is located in the sleeve and is slidably connected to it up and down. The upper end of the core shaft protrudes from the placement table. A compression spring is provided in the sleeve. The upper end of the compression spring is fixed to the core shaft, and the lower end of the compression spring is fixed to the inner bottom wall of the sleeve. The top rod passes through the compression spring, its upper end is fixed to the core shaft, and the lower end of the top rod can penetrate the sleeve;

[0016] The upper end of the mandrel is a conical end, and its upper surface is a planar structure;

[0017] A pin rod for restricting the capo is installed on the placement table.

[0018] Preferably, the press includes two hydraulic cylinders, which are fixed to the base table, and the hydraulic cylinders correspond to the placement table on the turntable.

[0019] Preferably, the displacement working assembly further includes a bottom ring, a groove is provided on the bottom ring, an incomplete track is provided in the groove, the sleeve slides in the groove along with the turntable. When the sleeve is not on the incomplete track, the mandrel can be completely pressed. When the sleeve is on the incomplete track, the mandrel can only descend to the placement table at most.

[0020] Preferably, the pin placer includes a placement barrel, and the placement barrel can periodically drop a pin onto the mandrel.

[0021] Compared with the prior art, the present invention has the following beneficial effects:

[0022] 1. In this automatic assembly line for guitar capos, by setting the spring clamping assembly, the midpoint of the spring falling between the two sets of clamping blocks is exactly at the center of the two clamping blocks in one set. Therefore, after the spring falls, its two ends are outside the two clamping blocks. When the two sets of clamping blocks are closed, the spring is restricted. When the two clamping blocks in the two sets of clamping blocks approach each other, the spring can be compressed. Due to the threaded groove provided, the position where the spring is compressed is always a part between the two clamping blocks, and the outer end will not move. Therefore, after the spring is compressed, it can be more easily placed between the two clamping handles of the capo, and the inner ring of the spring can also be sleeved on the pin of the clamping handle, and the effect of successful clamping at one time can be easily achieved.

[0023] 2. In this automatic assembly line for guitar capos, by setting the limiting assembly, due to the action of the placement table and the pin rod, the two clamping handles of the capo can be placed on the placement table and in an open state, the spring can be easily assembled, and it will remain in its original state after the spring is assembled, which is convenient for installing the pin later.

[0024] 3. In this automatic assembly line for guitar capos, by setting the turntable, after the spring is installed, the turntable rotates to drive the capo to move to the placement barrel. At this time, a pin can fall into the connection hole of the capo. The turntable continues to rotate, and the hydraulic cylinder presses the pin, so that the pin passes through the two capos and deforms. At this time, under the reaction force of the mandrel, the pressed capo will be ejected, then turned over and moved to the next station, and another hydraulic cylinder is used to press again, so that the effect of assembly line processing can be achieved on one workbench. Description of the Drawings

[0025] Figure 1 It is a schematic structural diagram of the present invention;

[0026] Figure 2 This is the top view of the structure of the present invention;

[0027] Figure 3 This is the structural diagram of the position-changing working component of the present invention;

[0028] Figure 4 This is the partial structural diagram of the position-changing working component of the present invention;

[0029] Figure 5 This is the present invention Figure 4 The enlarged structural view of part A in the present invention;

[0030] Figure 6 This is the structural diagram of the spring clamping component of the present invention;

[0031] Figure 7 This is the structural sectional view of the position-changing working component of the present invention;

[0032] Figure 8 This is the present invention Figure 7 The enlarged structural view of part B in the present invention;

[0033] Figure 9 This is the structural schematic diagram of the bottom ring of the present invention.

[0034] In the figure:

[0035] 1. Base platform; 2. Position-changing working component;

[0036] 201. Turntable; 202. Limiting component;

[0037] 2021. Sleeve; 2022. Core shaft; 2023. Ejector rod; 2024. Placing table; 2025. Compression spring; 2026. Pin rod;

[0038] 203. Bottom ring; 204. Groove; 205. Incomplete track;

[0039] 3. Spring clamping component;

[0040] 301. Rotary lifter;

[0041] 3011. Telescopic rod; 3012. Rotary table;

[0042] 302. Spring loader;

[0043] 3021. Cross bar; 3022. Extender;

[0044] 30221. Bottom rod; 30222. Clamping block; 30223. Arc surface; 30224. Thread groove;

[0045] 303. Spring unloader;

[0046] 4. Pin placer;

[0047] 401. Placing bucket;

[0048] 5. Presser;

[0049] 501. Hydraulic cylinder. Specific implementation manner

[0050] Next, the technical solutions in the embodiments of the present application will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present application.

[0051] It should be noted that all the directional indications in the embodiments of the present application are only used to explain the relative positional relationship and movement conditions between components in a specific posture. If the specific posture changes, the directional indications will also change accordingly.

[0052] In the present application, unless otherwise clearly defined and limited, terms such as "connection" and "fixation" shall be understood in a broad sense. For example, "fixation" can be a fixed connection, a detachable connection, or integrated; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and can be the communication inside two components or the interaction relationship between two components, unless otherwise clearly limited. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to specific circumstances.

[0053] In addition, in the present application, descriptions such as "first" and "second" are only for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the quantity of the indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include at least one of such features. In addition, the technical solutions between various embodiments can be combined with each other, but it must be based on the fact that those of ordinary skill in the art can implement it. When the combination of technical solutions is contradictory or cannot be implemented, it should be considered that such a combination of technical solutions does not exist and is not within the protection scope required by the present application.

[0054] As Figures 1 - 9 shown, an automatic assembly line for a guitar capo includes a base 1, and further includes a position-changing working component 2 and a spring clamping component 3 installed on the base 1. The position-changing working component 2 includes a turntable 201 that can rotate on the base 1 and a plurality of limiting components 202 installed on the turntable 201. The limiting components 202 are used for placing the capo.

[0055] The spring clamping assembly 3 includes a rotary lifter 301 mounted on the base 1 and a spring loader 302 mounted on the rotary lifter 301. The spring loader 302 is used to install springs into the collets on the limiting assembly 202.

[0056] A pin placer 4 is also mounted on the base 1 for replenishing pins; a puncher 5 is also mounted for loading pins.

[0057] The base 1 is a multi-layer structure, and each layer is made of aluminum alloy plates for fixing additional equipment above. The four sides are connected by reinforcing columns. The aluminum alloy plates for fixing can be customized in size according to upstream or downstream equipment, which can meet the needs of manual clamping and also meet various operation methods such as cooperating with robotic arm clamping. A motor and an axial bearing for support are installed at the bottom of the turntable 201. The motor is fixed on the machine table, and the output end of the motor is connected to the turntable 201. The motor is controlled by a servo encoder, and the rotation form is periodic rotation. Each time the turntable 201 rotates 45 degrees.

[0058] The rotary lifter 301 is used to achieve precise lifting and output rotation.

[0059] As Figures 1 - 5 shown: The spring loader 302 includes a cross bar 3021 and two telescopic devices 3022. The rotary lifter 301 includes a telescopic rod 3011 and a rotary table 3012. The telescopic rod 3011 is fixed to the base 1, and the rotary table 3012 is fixed to the upper end of the telescopic rod 3011. The cross bar 3021 is fixed to the output end of the rotary table 3012, and the cross bar 3021 can rotate.

[0060] The telescopic rod 3011 is an electric screw type extension rod, which can precisely control the extension amount and the length, with an error not exceeding 2 mm. The rotary table 3012 is composed of a motor and two relatively rotatable pedestals, which can independently control the rotation angle. According to the need to install springs, it is necessary to set the rotary table 3012 to rotate 180 degrees each time and to be aligned regularly.

[0061] As Figures 3 - 5 shown: The spring clamping assembly 3 further includes a spring unloader 303. The rotation of the cross bar 3021 can align the telescopic device 3022 with the spring unloader 303 for receiving the springs unloaded by the spring unloader 303. The cross bar 3021 can also make the telescopic device 3022 carry the spring and rotate to the limiting assembly 202 on the turntable 201.

[0062] The spring blanking device 303 is a rectangular box. Its internal length corresponds to the length of the spring, and its internal width corresponds to the diameter of the spring, enabling the springs to be arranged vertically. At the bottom of the spring blanking device 303, there are two rubber columns for releasing the springs. The rubber columns are driven by a servo motor. When the spring drops, it will be clamped between the two rubber columns. When the servo motor rotates, the two rubber columns can rotate correspondingly, thus extruding one spring. Therefore, the release of the springs can be controlled regularly, and according to the rotation of the turntable 201, programmable blanking can be achieved accordingly.

[0063] As Figure 5 shown: The telescopic device 3022 includes a bottom rod 30221 and two groups of clamping blocks 30222. The number of each group of clamping blocks 30222 is two. Between the two clamping blocks 30222 of any one group, there is an electric lead screw connection for moving the two clamping blocks 30222 closer to each other. One of the two clamping blocks 30222 in any one group is installed in the bottom rod 30221 and is also connected by an electric lead screw. The electric lead screw can enable the two clamping blocks 30222 in one group to move relatively, and another electric lead screw can enable the two groups of clamping blocks 30222 to move relatively;

[0064] On the mutually approaching surfaces of the two groups of clamping blocks 30222, there are arc surfaces 30223, and on the inner walls of the arc surfaces 30223, there are thread grooves 30224. The spring blanking device 303 can make the spring fall between the two groups of clamping blocks 30222.

[0065] The bottom rod 30221 is an orbit. One of each group of clamping blocks 30222 is installed in the bottom rod 30221 and is slidably connected thereto. The electric lead screw includes a motor and a ball screw structure. There is also a slide bar between the two sliders for restricting linear sliding. The rotation mode of the cross bar 3021 is reciprocating rotation, which can avoid the entanglement of the cables of the motor. Moreover, the cables of any one motor pass through the cross bar 3021 and are connected to the equipment below, and the cables are subjected to extended protection treatment to avoid the problem of motor power failure in the long-term processing environment.

[0066] The thickness of the clamping block 30222 can be selected according to the actual required length of the spring to be installed. If the spring is soft and short, the clamping block 30222 with a narrower width can be replaced. The arc surface 30223 structure of the clamping block 30222 is more adaptable to the shape of the spring, and the internally provided thread groove 30224 can be used to hold the spring. Even for a spring with a greater hardness, it can still be stably clamped without sliding.

[0067] As Figures 1 - 8As shown: The limiting component 202 includes a sleeve 2021, a mandrel 2022, a push rod 2023 and a placement table 2024. The placement table 2024 is fixed on the turntable 201. The sleeve 2021 is fixed at the bottom of the placement table 2024 and corresponds to the turntable 201. The mandrel 2022 is located inside the sleeve 2021 and is slidably connected to it up and down. The upper end of the mandrel 2022 protrudes above the placement table 2024. A compression spring 2025 is provided inside the sleeve 2021. The upper end of the compression spring 2025 is fixed to the mandrel 2022, and the lower end of the compression spring 2025 is fixed to the inner bottom wall of the sleeve 2021. The push rod 2023 passes through the compression spring 2025, and its upper end is fixed to the mandrel 2022. The lower end of the push rod 2023 can penetrate the sleeve 2021;

[0068] The upper end of the mandrel 2022 is a conical end, and the upper surface is a planar structure;

[0069] A pin rod 2026 for restricting the capo is installed on the placement table 2024.

[0070] The placement table 2024 is installed above the turntable 201 by bolts, and the upper end of the sleeve 2021 is also installed below the turntable 201 by bolts. The turntable 201 is provided with holes corresponding to the sleeve 2021 and the placement table 2024, and the mandrel 2022 passes through these holes. The upper end of the mandrel 2022 is a conical end, and the lower end is a cylindrical structure. The cylindrical structure can restrict the connection part of the two clamping handles of the capo, and the height of the mandrel 2022 should be lower than the thickness of the capo. The pin rod 2026 is installed on the placement table 2024 in a threaded form. The pin rod 2026 can change its position on the placement table 2024 to facilitate adapting to various existing specifications of capos. Changing the position of the pin rod 2026 requires ensuring that after the capo is placed, the two clamping handles are in an open state.

[0071] The press 5 includes two hydraulic cylinders 501. The hydraulic cylinders 501 are fixed to the base 1 and correspond to the placement table 2024 on the turntable 201.

[0072] The output end of the hydraulic cylinder 501 faces downward and is equipped with a pressing head for stamping the pin. The conical end structure of the mandrel 2022 can cause the pin to come into contact with it and deform when pressing down the pin. The pin is generally made of aluminum alloy and is prone to deformation after stamping, so as to connect the two clamping handles and make the two clamping handles hinge with the pin as the connection point.

[0073] The displacement working component 2 further includes a bottom ring 203. A groove 204 is provided on the bottom ring 203, and an incomplete track 205 is provided in the groove 204. The sleeve 2021 slides in the groove 204 along with the wheel disc 201. When the sleeve 2021 is not on the incomplete track 205, the mandrel 2022 can be fully pressed. When the sleeve 2021 is on the incomplete track 205, the mandrel 2022 can only drop to the placement table 2024 at most.

[0074] When the wheel disc 201 rotates, the sleeve 2021 contacts the bottom ring 203, and grease is applied between them. The bottom ring 203 can be used to support the sleeve 2021, while the groove 204 is used for the thimble 2023 to pass through.

[0075] The pin placer 4 includes a placement barrel 401, and the placement barrel 401 can periodically drop a pin onto the mandrel 2022.

[0076] The placement barrel 401 cooperates with the pin assembly line in the prior art.

[0077] In use, first place the parts of the two parts of the capo on the placement table 2024, open the two clamping handles and use the pin rod 2026 to restrict the clamping handles. Slip the pivot points of the two clamping handles onto the mandrel 2022. The height of the mandrel 2022 is lower than the thickness of the two clamping handles. As the turntable 201 moves the capo to the spring clamping assembly 3, the spring feeder 303 releases a spring between the two clamping blocks 30222. The midpoint of the spring that falls between the two sets of clamping blocks 30222 is exactly at the center of the two clamping blocks 30222 of one set. After the spring falls, its two ends are outside the two clamping blocks 30222. When the two sets of clamping blocks 30222 close, the spring is restricted. When the two clamping blocks 30222 in the two sets of clamping blocks 30222 approach each other, the spring can be compressed. The position where the spring is compressed is always a part between the two clamping blocks 30222, and the outer ends do not move. Therefore, after the spring is compressed, it can be more easily placed between the two clamping handles of the capo, and the inner ring of the spring can also be sleeved on the pin of the clamping handle, achieving clamping at one time. After installing the spring, the turntable 201 rotates and moves the capo to the placement bucket 401. At this time, a pin can fall into the connection hole of the capo and be on top of the mandrel 2022. The turntable 201 continues to rotate, and the first hydraulic cylinder 501 punches the pin so that the pin passes through the two capos. At this time, the sleeve 2021 moves to the incomplete track 205, and the extension amount of the ejector rod 2023 is restricted. The mandrel 2022 can be compressed by a certain distance. Therefore, when the hydraulic cylinder 501 presses on the pin, after the pin passes through the clamping handle, the bottom end contacts the mandrel 2022 and deforms. After releasing the hydraulic cylinder 501, at this time, under the reaction force of the mandrel 2022 and the compression spring 2025, the punched capo will be ejected. Then, after turning it over and moving to the next station, place the pin against the placement table 2024 and use another hydraulic cylinder 501 to punch again, then a complete capo can be processed.

[0078] In the description of this specification, the description with reference to terms such as "one embodiment", "some embodiments", "example", "specific example", or "some examples" means that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of this application. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described can be combined in a suitable manner in any one or more embodiments or examples. In addition, those skilled in the art can combine and combine the different embodiments or examples described in this specification.

[0079] In addition, the technical solutions between various embodiments can be combined with each other, provided that they can be implemented by those of ordinary skill in the art. When the combination of technical solutions is contradictory or cannot be implemented, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed in this application.

[0080] Although the embodiments of the present invention have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. An automatic assembly line for guitar capos, comprising a base (1), characterized in that: It further includes a displacement working component (2) and a spring clamping component (3) installed on the base (1). The displacement working component (2) includes a turntable (201) capable of rotating on the base (1) and a plurality of limiting components (202) installed on the turntable (201). The limiting components (202) are used for placing the transposition clips. The spring clamping component (3) includes a rotary lifter (301) installed on the base (1) and a spring loader (302) installed on the rotary lifter (301). The spring loader (302) is used for installing a spring into the transposition clip on the limiting component (202). A pin placer (4) for supplementing pins and a puncher (5) for loading pins are also installed on the base (1). The spring loader (302) includes a cross bar (3021) and two telescopic devices (3022). The rotary lifter (301) includes a telescopic rod (3011) and a rotary table (3012). The telescopic rod (3011) is fixed to the base (1), and the rotary table (3012) is fixed to the upper end of the telescopic rod (3011). The cross bar (3021) is fixed to the output end of the rotary table (3012), and the cross bar (3021) can rotate. The spring clamping component (3) further includes a spring feeder (303). The rotation of the cross bar (3021) can align the telescopic device (3022) with the spring feeder (303) to receive the spring fed by the spring feeder (303). The cross bar (3021) can also make the telescopic device (3022) rotate with the spring to the limiting component (202) on the turntable (201).

2. The automatic assembly line for guitar capo according to claim 1, wherein: The telescopic device (3022) includes a bottom rod (30221) and two groups of clamping blocks (30222). The number of each group of clamping blocks (30222) is two. The two clamping blocks (30222) in any one group are connected by an electric lead screw to make the two clamping blocks (30222) approach each other. One of the two clamping blocks (30222) in any one group is installed in the bottom rod (30221) and is also connected by an electric lead screw. The electric lead screw can realize the relative movement of the two clamping blocks (30222) in one group, and another electric lead screw can realize the relative movement of the two groups of clamping blocks (30222). Arc surfaces (30223) are provided on the mutually approaching surfaces of the two groups of clamping blocks (30222), and thread grooves (30224) are provided on the inner walls of the arc surfaces (30223). The spring feeder (303) can make the spring fall between the two groups of clamping blocks (30222).

3. The automatic assembly line for guitar capo according to claim 2, wherein: The limiting component (202) includes a sleeve (2021), a mandrel (2022), a push rod (2023) and a placement table (2024). The placement table (2024) is fixed on the turntable (201). The sleeve (2021) is fixed at the bottom of the placement table (2024) and corresponds to the turntable (201). The mandrel (2022) is located inside the sleeve (2021) and is slidably connected to it up and down. The upper end of the mandrel (2022) protrudes above the placement table (2024). A compression spring (2025) is provided inside the sleeve (2021). The upper end of the compression spring (2025) is fixed to the mandrel (2022), and the lower end of the compression spring (2025) is fixed to the inner bottom wall of the sleeve (2021). The push rod (2023) passes through the compression spring (2025), its upper end is fixed to the mandrel (2022), and the lower end of the push rod (2023) can penetrate the sleeve (2021); The upper end of the mandrel (2022) is a conical end, and its upper surface is a planar structure; A pin rod (2026) for limiting the capo is installed on the placement table (2024).

4. The automatic assembly line for guitar capo according to claim 3, wherein: The punching press (5) includes two hydraulic cylinders (501). The hydraulic cylinders (501) are fixed to the base (1), and the hydraulic cylinders (501) correspond to the placement table (2024) on the turntable (201).

5. The automatic assembly line for guitar capo according to claim 4, characterized in that: The displacement working component (2) further includes a bottom ring (203). A groove (204) is provided on the bottom ring (203), and an incomplete track (205) is provided in the groove (204). The sleeve (2021) slides in the groove (204) along with the turntable (201). When the sleeve (2021) is not on the incomplete track (205), the mandrel (2022) can be fully pressed. When the sleeve (2021) is on the incomplete track (205), the mandrel (2022) can only descend to the placement table (2024) at most.

6. The automatic assembly line for guitar capo according to claim 5, wherein: The pin placer (4) includes a placement barrel (401). The placement barrel (401) can periodically drop a pin onto the mandrel (2022).

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