Automatic feeding device for automobile door panel buckles

By designing the automatic feeding device of the car door panel buckle for the storage rail, feed mechanism and clutch mechanism, the problem of high manual assembly error rate is solved, and the efficient automatic feeding and simplified structure of the two buckles is realized, which improves the degree of automation.

CN223225261UActive Publication Date: 2025-08-15YANFENG AUTOMOTIVE TRIM SYST CHONGQING
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Patent Information

Application Number
CN202422620204.7
Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
Filing Date
2024-10-28
Publication Date
2025-08-15
Estimated Expiration
2034-10-28

AI Technical Summary

Technical Problem

In the prior art, the assembly of automotive door panel clamps requires manual operation, resulting in high probability of assembly errors between the two specification clamps, making it difficult to achieve efficient and automated feeding.

Method used

The automatic feeding device is designed including two storage rails, a feeding mechanism, a push arm, a first drive member and a clutch mechanism. The independent feeding control of different snaps is realized through the clutch mechanism, and multiple push arms are driven by a single drive member, simplifying the structure and improving the degree of automation.

Benefits of technology

The efficient feeding of the two snaps is achieved, which improves assembly efficiency and simplifies the structure, increases the degree of automation, and reduces the probability of errors in manual operations.

✦ Generated by Eureka AI based on patent content.

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Abstract

The utility model provides an automatic feeding device for automobile door panel buckles. The automatic feeding device comprises a base, two storage rails, two feeding mechanisms, two push arms, a first driving piece and two clutch mechanisms. The first driving piece can drive one pushing arm to push the workpieces in the corresponding storage rail out of the first discharging opening. And each clutch mechanism corresponds to the first driving piece and one push arm and is used for connecting or disconnecting the first driving piece and the push arm. The two storage rails are designed, and each storage rail can be suitable for the buckles of the corresponding specification, so that feeding of the two kinds of buckles can be achieved, and the assembling efficiency is improved. Meanwhile, by designing the first driving part and the two clutch mechanisms, the first driving part and the corresponding push arms can be connected or disconnected through the clutch mechanisms, and therefore under the condition that only one first driving part is designed, feeding operation of the buckles in the two storage rails can be achieved, the structure is simplified, and the automation degree is improved.
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Description

Technical Field

[0001] The utility model relates to the technical field of automobile interior decoration component assembly devices, in particular to an automobile door panel buckle automatic feeding device. Background Art

[0002] The interior door panels of car doors need to be connected with the door body's slots through multiple buckles to complete the connection between the two, as shown in the attached figure. Figure 11 and Figure 12 As shown, two types of clips (clip A and clip B) commonly used in car door panels. When assembling them to the door panel, the base of the clip needs to be slid and inserted into the slot of the door panel.

[0003] Currently, this process typically involves manual assembly, requiring operators to assemble the clips onto the door panels one by one. Since two sizes of clips need to be assembled, the probability of manual assembly errors is high. Therefore, automated tooling is needed to automatically assemble the two clips. However, designing a feeding mechanism to work with the assembly tooling to efficiently feed the two clips and improve production efficiency is a pressing issue for those skilled in the art. Utility Model Content

[0004] In view of the defects in the prior art, the purpose of the present invention is to provide an automatic feeding device for automobile door panel buckles to meet the efficient feeding of two types of buckles and improve production efficiency.

[0005] In order to achieve the above-mentioned objectives, the utility model provides an automatic feeding device for automobile door panel buckles, comprising a base; two storage rails arranged in parallel on the base, the storage rails having a first feed port and a first discharge port; two feeding mechanisms, respectively corresponding to the two storage rails, the feeding mechanisms being used to transport workpieces into the storage rails; two push arms, respectively corresponding to the two storage rails, the push arms slidingly fitting on the base along a direction parallel to the length direction of the storage rails; a first driving member, arranged between the two storage rails, the first driving member being able to drive one of the push arms to extend into the corresponding first feed port and push the workpiece in the storage rail out of the first discharge port; and two clutch mechanisms, each of the clutch mechanisms corresponding to the first driving member and one of the push arms, the clutch mechanism being used to connect or disconnect the first driving member and the push arm.

[0006] Preferably, the clutch mechanism includes: a first connecting block connected to the first driving member; a second connecting block provided on the push arm, the horizontal height of the bottom surface of the second connecting block is higher than the horizontal height of the top surface of the first connecting block, and the second connecting block is provided with a socket; an insert block vertically slidingly fitted on the first connecting block, and the socket can be inserted into the socket; and a lifting assembly for driving the insert block to rise and insert into the socket, and preventing the insert block from exiting the socket, or for allowing the insert block to descend and exit the socket.

[0007] Preferably, the lifting assembly includes a limit block and a second driving member, the limit block is vertically lifted and lowered on the base, the length direction of the limit block is parallel to the length direction of the storage track, the limit block is arranged below the plug block and can lift the plug block, and the plug block can move against the top surface of the limit block; the second driving member is arranged on the base, and the second driving member is used to drive the limit block to perform lifting and lowering actions.

[0008] Preferably, two first guide rods are provided on the bottom surface of the first connecting block, a first limit head is provided at the bottom of the first guide rod, two support ears are provided on both sides of the plug block, each of the support ears slides on the corresponding first guide rod and abuts the first limit head; each of the first guide rods is provided with an elastic member, and the two ends of the elastic member respectively abut the bottom surface of the first connecting block and the bottom surface of the support ear.

[0009] Preferably, the clutch mechanism further includes a bracket, an electromagnet and a magnetic attraction member, the bracket is arranged on the base, the electromagnet is arranged on the bracket, the magnetic attraction member is arranged on the second connecting block, and the electromagnet can be magnetically attracted to the magnetic attraction member.

[0010] Preferably, a connecting arm is provided on the first driving member, and the connecting arm is connected to the two first connecting blocks.

[0011] Preferably, it further includes two sliding components, each sliding component corresponds to one push arm, the sliding component includes a slide rail and a slider, the slide rail is arranged on the base, the slider slides on the slide rail, and the push arm is installed on the slider.

[0012] Beneficial effects of the utility model:

[0013] The utility model discloses an automatic feeding device for automobile door panel buckles. By designing two storage tracks, each of which can accommodate buckles of corresponding specifications, the device can feed both types of buckles, thereby improving assembly efficiency. Furthermore, by designing a first drive member and two clutch mechanisms, the clutch mechanisms can connect or disconnect the first drive member with corresponding push arms. Thus, with only one first drive member, the device can feed buckles into both storage tracks, simplifying the structure and improving the degree of automation. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] To more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the following briefly describes the drawings required for the specific embodiments or the description of the prior art. Similar elements or parts are generally identified by similar reference numerals throughout the drawings. Elements or parts in the drawings are not necessarily drawn to scale.

[0015] Figure 1 This is a schematic structural diagram of an automatic feeding device for automobile door panel buckles provided by one embodiment of the present utility model;

[0016] Figure 2 for Figure 1 Top view of the state;

[0017] Figure 3 It is a structural diagram of the coordination between the feeding track and the storage track;

[0018] Figure 4 It is a structural diagram of the push arm;

[0019] Figure 5 It is a structural diagram of the clutch mechanism;

[0020] Figure 6 for Figure 5 Top view of the state;

[0021] Figure 7 It is a partial schematic diagram of the clutch mechanism;

[0022] Figure 8 for Figure 6 AA cross-sectional diagram in;

[0023] Figure 9 for Figure 6 BB cross-section diagram in;

[0024] Figure 10 It is a structural diagram of the coordination between the electromagnet and the magnetic attraction component;

[0025] Figure 11 Schematic diagram of the structure of buckle A;

[0026] Figure 12 Schematic diagram of the structure of buckle B;

[0027] Reference numerals:

[0028] 10. Base; 20. Storage track; 31. Feed track; 32. Transposition block; 321. Accommodation slot; 33. Third driving member; 34. Fourth driving member; 40. Push arm; 50. First driving member; 51. Connecting arm; 60. Clutch mechanism; 61. First connecting block; 611. First guide rod; 612. Elastic member; 62. Second connecting block; 621. Socket; 63. Insert block; 64. Limit block; 65. Second driving member; 66. Bracket; 67. Electromagnet; 68. Magnetic member; 71. Slide rail; 72. Slider. DETAILED DESCRIPTION

[0029] The following embodiments of the technical solution of the present invention are described in detail with reference to the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the present invention and are therefore only examples and are not intended to limit the scope of protection of the present invention.

[0030] It should be noted that, unless otherwise specified, the technical terms or scientific terms used in this application should have the common meanings understood by those skilled in the art to which this utility model belongs.

[0031] In the description of this application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0032] In addition, the terms "first," "second," etc. are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the technical features indicated. In the description of this utility model, "plurality" means more than two, unless otherwise specifically defined.

[0033] In this application, unless otherwise expressly specified or limited, the terms "installed," "connected," "connect," "fixed," etc. should be understood in a broad sense. For example, they can refer to fixed connection, detachable connection, or integration; mechanical connection or electrical connection; direct connection or indirect connection through an intermediate medium; internal communication between two components or interaction between two components. Those skilled in the art will understand the specific meanings of the above terms in this utility model based on specific circumstances.

[0034] In this application, unless otherwise expressly specified or limited, when a first feature is "above" or "below" a second feature, it may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Furthermore, when a first feature is "above," "above," or "above" a second feature, it may mean that the first feature is directly above or diagonally above the second feature, or simply means that the first feature is at a higher level than the second feature. When a first feature is "below," "below," or "below" a second feature, it may mean that the first feature is directly below or diagonally below the second feature, or simply means that the first feature is at a lower level than the second feature.

[0035] like Figure 1-10 As shown, in one embodiment of the present invention, an automatic feeding device for automobile door panel buckles is provided, comprising a base 10, two storage rails 20, two feeding mechanisms, two push arms 40, a first drive member 50, and two clutch mechanisms 60. The two storage rails 20 are arranged parallel to the base 10 and have a first feed port and a first discharge port. Each feeding mechanism corresponds to a storage rail 20 and is used to deliver workpieces into the storage rails 20.

[0036] Each push arm 40 corresponds to a storage track 20 and slides onto the base 10 in a direction parallel to the length of the storage track 20. A first drive member 50 is positioned between the two storage tracks 20. The first drive member 50 drives one of the push arms 40 into the corresponding first feed port and pushes the workpiece in that storage track 20 out of the first discharge port. Each clutch mechanism 60 corresponds to a first drive member 50 and a push arm 40, and the clutch mechanism 60 is used to connect and disconnect the first drive member 50 from the push arm 40.

[0037] To facilitate description of the operating principle of this device, the two storage rails 20 are designated as storage rails 20a and storage rails 20b, the two feeding mechanisms are designated as feeding mechanism a and feeding mechanism b, the two push arms 40 are designated as push arms 40a and push arms 40b, and the two clutch mechanisms 60 are designated as clutch mechanisms 60a and clutch mechanisms 60b. Storage rail 20a is suitable for buckle A, and storage rail 20a, feeding mechanism a, push arm 40a, and clutch mechanism 60a correspond to each other. Storage rail 20b is suitable for buckle B, and storage rail 20b, feeding mechanism b, push arm 40b, and clutch mechanism 60b correspond to each other.

[0038] During operation, the feeding mechanism a feeds materials adaptively according to the number of buckles A in the storage track 20a, and the feeding mechanism b feeds materials adaptively according to the number of buckles B in the storage track 20b.

[0039] The manipulator drives a loading clip (not shown) to load buckle A and / or buckle B. When buckle A needs to be loaded, the manipulator drives the loading clip to align and connect with the first discharge port a of the storage track 20a. Next, the clutch mechanism 60a connects the first driver 50 to the push arm 40a, and the clutch mechanism 60b disconnects the first driver 50 from the push arm 40b. In this way, the first driver 50 can drive the push arm 40a through the clutch mechanism 60a to extend into the first feed port a and push the buckle A in the storage track 20a from the first discharge port a into the loading clip. After the first driver 50 drives the push arm 40a to reset, the clutch mechanism 60a can be disconnected from the push arm 40a and connected to the push arm 40b, depending on the actual situation, thereby completing the loading of buckle B.

[0040] This embodiment discloses an automatic feeding device for automobile door panel buckles. By designing two storage rails 20, each storage rail 20 can accommodate buckles of corresponding specifications. This allows for feeding of both types of buckles, thereby improving assembly efficiency. Furthermore, by designing a first drive member 50 and two clutch mechanisms 60, the clutch mechanisms 60 can connect or disconnect the first drive member 50 with corresponding push arms 40. Thus, with only one first drive member 50, it is possible to feed buckles into both storage rails 20, simplifying the structure and improving the degree of automation.

[0041] In one embodiment, the clutch mechanism 60 includes a first connecting block 61, a second connecting block 62, an insert block 63, and a lifting assembly. The first driving member 50 is provided with a connecting arm 51, which is connected to the two first connecting blocks 61. The second connecting block 62 is provided on the push arm 40. The bottom surface of the second connecting block 62 is higher than the top surface of the first connecting block 61. The second connecting block 62 is provided with a socket 621. The insert block 63 is vertically slidably engaged with the first connecting block 61, and the socket 621 can be inserted into the socket 621. The lifting assembly is used to drive the insert block 63 upward to insert into the socket 621, prevent the insert block 63 from exiting the socket 621, and to allow the insert block 63 to descend and exit the socket 621.

[0042] When the buckle A in the storage rail 20a needs to be pushed into the loading clip, the lifting assembly a first drives the insert block 63a into the upper socket 621a, thereby connecting the first connecting block 61a and the second connecting block 62a. At this time, the insert block 63b is not inserted into the socket 621b, and the first connecting block 61b and the second connecting block 62b are disconnected. Therefore, when the connecting arm 51 moves the first connecting block 61a and the first connecting block 61b, it only moves the second connecting block 62a and the push arm 40a, and does not move the second connecting block 62b and the push arm 40b.

[0043] Next, the first driving member 50 drives the connecting arm 51 to move, which in turn drives the first connecting block 61a, the second connecting block 62a, and the push arm 40a to move synchronously. This allows the push arm 40a to push the clip A in the storage track 20a from the first discharge port a into the loading clip. Finally, the first driving member 50 drives the first connecting block 61a, the second connecting block 62a, and the push arm 40a to return to their original position, and the feeding mechanism a delivers the clip A into the storage track 20a, awaiting the next feeding.

[0044] In one embodiment, the lifting assembly includes a limit block 64 and a second drive member 65. The limit block 64 is mounted on the base 10 for vertical lifting. The length of the limit block 64 is parallel to the length of the storage track 20. The limit block 64 is located below the insert block 63 and can lift the insert block 63. The insert block 63 can move against the top surface of the limit block 64. The second drive member 65 is located on the base 10 and is used to drive the limit block 64 to perform the lifting action.

[0045] Taking the clutch mechanism 60a as an example, when the second driving member 65a lifts the limit block 64a, the limit block 64a will push the insert block 63a to move upward, and the insert block 63a can be inserted into the socket 621a, thereby realizing the connection between the first connecting block 61a and the second connecting block 62a.

[0046] Next, the first driving member 50 drives the connecting arm 51 to move, which in turn drives the first connecting block 61a, the first connecting block 61b, the second connecting block 62a, and the push arm 40a to move synchronously. Because the stopper 64a always abuts the bottom of the inserting block 63a, the inserting block 63a always slides against the top surface of the stopper 64a. Therefore, the inserting block 63a will not fall out of the socket 621a, thus ensuring the stability of the connection between the first connecting block 61a, the second connecting block 62a, and the push arm 40a.

[0047] After the connecting arm 51, the first connecting block 61a, the first connecting block 61b, the second connecting block 62a and the push arm 40a are reset, the second driving member 65a will drive the limit block 64a to descend, and the insertion block 63a will also descend with the limit block 64a until the insertion block 63a is completely disengaged from the socket 621a, thereby achieving the disconnection between the first connecting block 61a and the second connecting block 62a.

[0048] In one embodiment, the bottom surface of the first connecting block 61 is provided with two first guide rods 611, each of which is provided with a first stopper. Two lugs are provided on either side of the insert block 63, each of which slides over a corresponding first guide rod 611 and abuts the first stopper. Each first guide rod 611 is sleeved with a first elastic member 612, the ends of which abut the bottom surface of the first connecting block 61 and the bottom surface of the lug, respectively. This structural design ensures the stability of the connection between the insert block 63 and the first connecting block 61. Furthermore, when the stopper 64 lifts the insert block 63 upward to insert it into the insertion hole 621, the lugs further compress the elastic member 612. Once the stopper 64 descends, the insert block 63 descends not only under its own weight but also driven by the elastic member 612, thereby ensuring that the insert block 63 can smoothly exit the insertion hole 621.

[0049] In one embodiment, the clutch mechanism 60 further includes a bracket 66, an electromagnet 67, and a magnetic member 68. The bracket 66 is mounted on the base 10, the electromagnet 67 is mounted on the bracket 66, and the magnetic member 68 is mounted on the second connecting block 62. The electromagnet 67 and the magnetic member 68 are magnetically attracted to each other. When the push arm 40 is in the initial position, the electromagnet 67 is energized and magnetically attracted to the magnetic member 68. This ensures that the second connecting block 62 and the push arm 40 do not move, thereby allowing the insert block 63 to align with the receptacle 621.

[0050] When the push arm 40a is about to move, the electromagnet 67a is powered off, and the electromagnet 67a will no longer magnetically attract the magnetic member 68a. In this way, the first driving member 50 can drive the connecting arm 51, the first connecting block 61a, the first connecting block 61b, the second connecting block 62a and the push arm 40a to move.

[0051] In one embodiment, in order to make the movement process of the push arm 40 smoother, the feeding device also includes two sliding assemblies, each sliding assembly corresponds to a push arm 40, and the sliding assembly includes a slide rail 71 and a slider 72. The slide rail 71 is provided on the base 10, and the slider 72 slides on the slide rail 71. The push arm 40 and the second connecting block 62 are both installed on the slider 72.

[0052] In one embodiment, the feeding mechanism includes a vibrating plate (not shown in the drawings), a feeding track 31, a linear vibrator (not shown in the drawings), a displacement block 32, a third driving member 33, and a fourth driving member 34. The feeding track 31 is parallel to the storage track 20 and is staggered. The feeding track 31 has a second discharge port. The feeding track 31 is mounted on the linear vibrator. After the vibrating plate is started, the buckle in the vibrating plate will continuously move upward through the spiral track of the vibrating plate and eventually transport the buckle into the feeding track 31. Under the action of the linear vibrator, the buckle in the feeding track 31 will continuously move toward the second discharge port.

[0053] The transposition block 32 is provided with a receiving slot 321 that can accommodate a clip. When the receiving slot 321 is aligned with the second discharge port, the clip closest to the second discharge port in the feed track 31 enters the receiving slot 321 under the action of the linear vibrator. Then, the third driving member 33 drives the transposition block 32 to move, ultimately aligning the receiving slot 321 with the first feed port. During this process, the transposition block 32 blocks the second discharge port. Even under the action of the linear vibrator, the clip closest to the second discharge port in the feed track 31 can only rest against the transposition block 32 and cannot move further.

[0054] After the receiving groove 321 is aligned with the second feed opening, the fourth driver 34 drives the push arm 40 to push the clip in the receiving groove 321 into the storage track 20. The fourth driver 34 then drives the push arm 40 to reset, clearing the transposition block 32. This allows the third driver 33 to move the transposition block 32, thereby aligning the receiving groove 321 with the second feed opening. In this way, under the action of the linear vibrator, the clip in the feed track 31 moves back into the receiving groove 321, awaiting the next transposition. The first driver 50, the second driver 65, the third driver 33, and the fourth driver 34 are all pneumatic cylinders. The feeding mechanism is conventional and will not be described in detail in this embodiment.

[0055] In the specification of the present invention, a large number of specific details are described. However, it is understood that the embodiments of the present invention can be practiced without these specific details. In some instances, well-known methods, structures and techniques are not shown in detail so as not to obscure the understanding of this specification.

[0056] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the above embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the above embodiments, or make equivalent replacements for some or all of the technical features therein. These modifications or replacements do not deviate the essence of the corresponding technical solutions from the scope of the technical solutions of the embodiments of the present invention, and they should all be included in the scope of the claims and description of the present invention.

Claims

1. An automatic feeding device for automobile door panel buckles, characterized in that: include: Base (10); Two storage rails (20) are arranged in parallel on the base (10), and the storage rails (20) have a first feed port and a first discharge port; Two feeding mechanisms, corresponding to the two storage rails (20) respectively, and the feeding mechanisms are used to transport workpieces into the storage rails (20); Two push arms (40), corresponding to the two storage rails (20) respectively, and the push arms (40) are slidably fitted on the base (10) along a direction parallel to the length direction of the storage rails (20); A first driving member (50) is provided between the two storage rails (20), and the first driving member (50) can drive one of the push arms (40) to extend into the corresponding first feed port, and push the workpiece in the storage rail (20) out of the first discharge port; as well as Two clutch mechanisms (60), each of the clutch mechanisms (60) corresponds to the first driving member (50) and one of the push arms (40), and the clutch mechanisms (60) are used to connect or disconnect the first driving member (50) and the push arm (40).

2. The automatic feeding device for automobile door panel buckles according to claim 1 is characterized in that: The clutch mechanism (60) comprises: a first connecting block (61), connected to the first driving member (50); A second connecting block (62) is provided on the push arm (40), wherein the bottom surface of the second connecting block (62) is higher than the top surface of the first connecting block (61), and a socket (621) is provided on the second connecting block (62); an inserting block (63) which is slidably fitted on the first connecting block (61) in a vertical direction, and into which the inserting hole (621) can be inserted; and A lifting assembly is used to drive the insert block (63) to rise and be inserted into the insert hole (621), and to prevent the insert block (63) from exiting the insert hole (621), or to allow the insert block (63) to descend and exit the insert hole (621).

3. The automatic feeding device for automobile door panel buckles according to claim 2, characterized in that: The lifting assembly comprises a limit block (64) and a second driving member (65), wherein the limit block (64) is vertically lifted and lowered on the base (10), the length direction of the limit block (64) is parallel to the length direction of the storage track (20), the limit block (64) is arranged below the insert block (63) and can lift the insert block (63), and the insert block (63) can move against the top surface of the limit block (64); the second driving member (65) is arranged on the base (10), and the second driving member (65) is used to drive the limit block (64) to perform a lifting action.

4. The automatic feeding device for automobile door panel buckles according to claim 3 is characterized in that: Two first guide rods (611) are provided on the bottom surface of the first connecting block (61), a first limiting head is provided at the bottom of the first guide rod (611), and two ears are provided on both sides of the insert block (63), each of the ears is slidably fitted on the corresponding first guide rod (611) and abuts against the first limiting head; Each of the first guide rods (611) is sleeved with an elastic member (612), and two ends of the elastic member (612) respectively abut against the bottom surface of the first connecting block (61) and the bottom surface of the support ear.

5. The automatic feeding device for automobile door panel buckles according to claim 2, characterized in that: The clutch mechanism (60) further comprises a bracket (66), an electromagnet (67) and a magnetic attraction member (68); the bracket (66) is arranged on the base (10); the electromagnet (67) is arranged on the bracket (66); the magnetic attraction member (68) is arranged on the second connecting block (62); and the electromagnet (67) can be magnetically attracted to the magnetic attraction member (68).

6. The automatic feeding device for automobile door panel buckles according to claim 2, characterized in that: A connecting arm (51) is provided on the first driving member (50), and the connecting arm (51) is connected to the two first connecting blocks (61).

7. The automatic feeding device for automobile door panel buckles according to claim 1, characterized in that: The invention also includes two sliding assemblies, each of which corresponds to one of the push arms (40). The sliding assemblies include a slide rail (71) and a slider (72). The slide rail (71) is provided on the base (10), the slider (72) is slidably fitted on the slide rail (71), and the push arm (40) is mounted on the slider (72).