A drive module for a front derailleur

Abstract

The utility model discloses a drive module of front chain derailleur, including mutually lock together's first casing and second casing, and drive module still includes connecting seat, first plug and circuit board, and connecting seat is fixed in the first casing, and connecting seat is integrated with a plurality of side -by -side arrangement's electrically conductive spring leaf, and first plug has a plurality of terminal in, and a plurality of terminal and a plurality of electrically conductive spring leaf one -to -one corresponding electric connection, and circuit board is fixed in the second casing, and circuit board side facing connecting seat is side -by -side arrangement with a plurality of electrically conductive sheet, when first casing and second casing mutually lock together, a plurality of electrically conductive sheet and a plurality of electrically conductive spring leaf one -to -one corresponding electric contact, make circuit board with first plug electric connection. The utility model solves the existing front chain derailleur drive module in two casing assembly process wire is easy to be pulled and is bent and leads to tin soldering spot crack and fall off and causes circuit contact bad or open circuit, and wire tin soldering procedure is complicated, and increases assembly time and artificial cost etc.

Description

Technical Field

[0001] This utility model relates to the field of front derailleur technology, and in particular to a drive module for a front derailleur. Background Technology

[0002] In a bicycle derailleur system, the front derailleur drive module is the core component that enables chain position switching and ensures stable operation of the shifting function. It typically consists of interlocking housings, a circuit board for control and signal processing, and wiring structures for connecting external circuits.

[0003] In the prior art, in order to realize the transmission of electrical signals and power between the internal circuit board of the drive module and external devices (such as the rear derailleur), the circuit board and the connector for external docking are often connected by multiple wires. Specifically, the two ends of the wires are soldered to the conductive terminals of the circuit board and the pins of the connector to establish a stable electrical connection.

[0004] However, the aforementioned traditional wire soldering connection structure has many problems in actual production, assembly, and use, making it difficult to meet the reliability and assembly efficiency requirements of the front derailleur drive module. On the one hand, since the circuit board and the connector are often fixed to two snap-fit ​​housings of the drive module respectively (e.g., the circuit board is fixed to the first housing and the connector is fixed to the second housing), during the assembly process where the two housings snap together, the wires connecting them are easily subjected to external forces such as pulling and bending due to the relative displacement of the housings. This can lead to cracking and detachment of the solder joints, resulting in poor circuit contact or open circuits, directly affecting the speed control function of the drive module. On the other hand, the wire soldering process is cumbersome, requiring precise positioning of the soldering position for each wire, which increases assembly time and labor costs. Utility Model Content

[0005] To address the shortcomings of existing technologies, this utility model provides a drive module for a front derailleur, which solves the problems of wires being easily pulled and bent during the assembly of the two housings in existing front derailleur drive modules, leading to cracking and detachment of solder joints, resulting in poor circuit contact or open circuits, and the cumbersome process of soldering each wire individually, which increases assembly time and labor costs.

[0006] This utility model is achieved through the following technical solution: A drive module for a front derailleur includes a first housing and a second housing that are interlocked with each other, and the drive module further includes: A connector is fixed inside the first housing, and a plurality of conductive spring contacts are integrated on the connector. A first connector, which has multiple terminals, and the multiple terminals are electrically connected to the multiple conductive springs one by one; A circuit board, which is fixed inside the second housing, and has multiple conductive sheets arranged side by side on the side of the circuit board facing the connector; When the first housing and the second housing are fastened together, the plurality of conductive sheets and the plurality of conductive springs make electrical contact with each other, thereby making the circuit board electrically connected to the first connector.

[0007] Furthermore, it also includes a flexible flat cable, through which the plurality of conductive spring contacts are electrically connected to the plurality of terminals within the first connector.

[0008] Furthermore, the bottom of the first housing is provided with a mounting groove, and the connecting seat is pressed into the mounting groove.

[0009] Furthermore, the first housing has a mounting hole, and the first connector is fixed in the mounting hole.

[0010] Furthermore, an annular groove is formed on the outer peripheral surface of the first connector, and a protrusion that mates with the annular groove is formed on the inner wall of the mounting hole.

[0011] Furthermore, the first connector is fixedly connected to the inner wall of the mounting hole by sealant.

[0012] Furthermore, a bracket is fixed inside the second housing, the bracket having a first positioning post and a screw hole, the circuit board having a first positioning hole and a through hole, the first positioning post engaging with the first positioning hole, and a locking member passing through the through hole and being fixedly connected to the screw hole to fix the circuit board to the bracket.

[0013] Furthermore, the bracket is provided with a plurality of second positioning posts, and the first housing is provided with a plurality of positioning grooves that correspond one-to-one with the plurality of second positioning posts.

[0014] Furthermore, it also includes a drive assembly, which includes a drive motor and a gear assembly that is connected to the drive motor in a transmission manner. The drive motor and the gear assembly are respectively fixed on opposite sides of the bracket, and the drive motor is electrically connected to the circuit board.

[0015] Furthermore, it also includes a battery electrically connected to the circuit board. The second housing has a fixing groove, and the battery is at least partially assembled in the fixing groove. The first housing also has a plurality of ribs protruding from it. When the first housing and the second housing are fastened together, the ribs abut against the side of the battery away from the second housing.

[0016] Compared with existing technologies, the advantages of this utility model are: By using contact connections of conductive springs and conductive sheets in conjunction with flexible flat cables, problems such as solder joint cracking and circuit breakage caused by wire pulling during shell snapping are avoided. At the same time, multiple sets of connection points can be synchronously and accurately connected, eliminating the need for individual soldering processes, reducing labor costs and assembly time, and making it suitable for mass production. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the driver module. Figure 2 This is an exploded view of the driver module; Figure 3 This is a partial structural diagram of the driver module; Figure 4 A partial structural diagram of the driver module Figure 1 ; Figure 5 This is a schematic diagram of the first shell structure; Figure 6 This is a cross-sectional view of the drive module structure. Figure 7 A partial structural diagram of the driver module Figure 2 .

[0018] 100, First housing; 110, Mounting groove; 120, Mounting hole; 121, Protrusion; 130, Positioning groove; 140, Rib; 200, Second housing; 210, Fixing groove; 300, Connecting seat; 310, Conductive spring; 400, First connector; 410, Annular groove; 500, Circuit board; 510, Conductive sheet; 520, First positioning hole; 530, Through hole; 600, Flexible flat cable; 700, Bracket; 710, First positioning post; 720, Screw hole; 730, Second positioning post; 800, Drive assembly; 810, Drive motor; 820, Gear assembly; 900, Battery. Detailed Implementation

[0019] The following detailed, non-limiting description of the utility model's technical solution, in conjunction with preferred embodiments and accompanying drawings, is provided. In the description of this utility model, 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," and "circumferential," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this utility model, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain this utility model, and should not be construed as limiting this utility model.

[0020] like Figures 1-4As shown, a drive module for a front derailleur according to an embodiment of the present invention includes a first housing 100 and a second housing 200 that are interlocked. The drive module further includes a connector 300, a first plug 400, and a circuit board 500. The connector 300 is fixed inside the first housing 100 and has multiple conductive springs 310 arranged side by side. The first plug 400 has multiple terminals that are electrically connected to the multiple conductive springs 310 in a one-to-one correspondence. The circuit board 500 is fixed inside the second housing 200 and has multiple conductive sheets 510 arranged side by side on the side of the circuit board 500 facing the connector 300. When the first housing 100 and the second housing 200 are interlocked, the multiple conductive sheets 510 make electrical contact with the multiple conductive springs 310 in a one-to-one correspondence, so that the circuit board 500 is electrically connected to the first plug 400. When the first housing 100 and the second housing 200 are assembled together, the connector 300, which integrates multiple conductive springs 310 arranged side by side, is first fixed inside the first housing 100. Then, the multiple terminals in the first connector 400 are electrically connected to the conductive springs 310 on the connector 300 one by one. At the same time, the circuit board 500 with multiple conductive plates 510 arranged side by side is fixed inside the second housing 200, ensuring that the conductive plates 510 of the circuit board 500 face the connector 300 of the first housing 100. Then, the first housing 100 and the second housing 200 are aligned with the fastening direction, and the two housings are slowly pushed until they are fully fastened. During this process, the multiple conductive plates 510 of the circuit board 500 will make tight electrical contact with the multiple conductive springs 310 of the connector 300 one by one, thereby making the circuit board 500... The drive module is stably electrically connected to the first connector 400, and the connection between the drive module and external devices (such as the rear derailleur) can be completed through the first connector 400. This assembly method not only eliminates the traditional wire soldering structure, avoiding the problem of solder joint cracking and falling off caused by wire pulling and bending during housing snapping, thus eliminating the risk of poor circuit contact or open circuit from the root and ensuring the stability of the transmission control function, but also saves the tedious process of soldering each wire one by one. There is no need to accurately locate the soldering position, which greatly reduces assembly time and labor costs, making it suitable for mass production. In addition, the conductive spring 310 is elastic and can adapt to the small assembly deviations when the housing is snapped together by its own deformation, ensuring that the conductive piece 510 and the conductive spring 310 are always in close contact, further enhancing the assembly fault tolerance and electrical connection stability, and extending the service life of the drive module.

[0021] The first connector 400 can be a plug or a socket, mainly used to mate with a socket or plug on an external rear derailleur to realize the transmission of electrical signals and power between the front and rear derailleurs. When the first connector 400 is a plug, its internal terminals are pins; when the first connector 400 is a socket, its internal terminals are conductive contact pieces inside the inner hole.

[0022] like Figure 3As shown, the drive module also includes a flexible flat cable 600, through which multiple conductive springs 310 are electrically connected to multiple terminals within the first connector 400. The flexible flat cable 600 enables simultaneous and precise docking of multiple sets of connection points, reducing misalignment errors associated with traditional single-wire connection and improving electrical connection accuracy. The connection method is simple, allowing for batch docking, eliminating the tedious individual soldering process, shortening assembly time, reducing labor costs, and adapting to mass production. Simultaneously, its thin design allows for flexible folding and arrangement, optimizing the utilization of internal space and supporting compact module design.

[0023] like Figure 5 As shown, a mounting groove 110 is provided at the bottom of the first housing 100, and the connector 300 is pressed into the mounting groove 110. The connector 300 can be snapped into the mounting groove 110 by pressing. Furthermore, adhesive can be applied to the mounting groove 110 to further fix the connector 300.

[0024] like Figure 6 As shown, the first housing 100 has a mounting hole 120, and the first connector 400 is fixed in the mounting hole 120. The outer peripheral surface of the first connector 400 has an annular groove 410, and the inner wall of the mounting hole 120 has a protrusion 121 that mates with the annular groove 410.

[0025] In this embodiment, the first connector 400 is fixedly connected to the inner wall of the mounting hole 120 by sealant. The sealant not only enhances the structural stability between the first connector 400 and the first housing 100, but also effectively prevents external moisture, dust and other impurities from entering the housing, thereby improving the environmental adaptability and reliability of the drive module.

[0026] like Figure 4 As shown, a bracket 700 is fixed inside the second housing 200. The bracket 700 has a first positioning post 710 and a screw hole 720. The circuit board 500 has a first positioning hole 520 and a through hole 530. The first positioning post 710 mates with the first positioning hole 520. A locking member passes through the through hole 530 and is fixedly connected to the screw hole 720 to secure the circuit board 500 to the bracket 700. Through the precise engagement of the first positioning post 710 and the first positioning hole 520, the circuit board 500 is quickly positioned and stably installed on the bracket 700.

[0027] like Figure 4 and Figure 5As shown, the bracket 700 also has multiple second positioning posts 730, and the first housing 100 has multiple positioning grooves 130 that correspond one-to-one with the multiple second positioning posts 730. Through the cooperation of the second positioning posts 730 and the positioning grooves 130, the bracket 700 and the first housing 100 are precisely aligned and securely connected, effectively avoiding structural loosening or component interference caused by positional deviations during assembly, and improving the overall assembly accuracy and efficiency.

[0028] like Figure 7 As shown, the drive module also includes a drive assembly 800, which includes a drive motor 810 and a gear assembly 820 that is connected to the drive motor 810 for transmission. The drive motor 810 and the gear assembly 820 are respectively fixed on opposite sides of the bracket 700, and the drive motor 810 is electrically connected to the circuit board 500. The drive motor 810 receives control signals through the circuit board 500, converts electrical energy into mechanical power, and outputs it to the external actuator after being reduced in speed and increased in torque by the gear assembly 820. The drive motor 810 and the gear assembly 820 are respectively fixed on opposite sides of the bracket 700, optimizing the internal space layout of the housing.

[0029] like Figure 4 , Figure 5 and Figure 7 As shown, the drive module also includes a battery 900 electrically connected to the circuit board 500. A fixing groove 210 is provided inside the second housing 200, and the battery 900 is at least partially assembled within the fixing groove 210. Furthermore, multiple ribs 140 protrude from the first housing 100. When the first housing 100 and the second housing 200 are engaged, the ribs 140 abut against the side of the battery 900 opposite to the second housing 200. The ribs 140 not only limit and fix the battery 900, preventing displacement under vibration or impact conditions, but also enhance the local structural strength of the first housing 100.

[0030] The embodiments described above are merely illustrative of several implementations of this utility model, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of this utility model patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these all fall within the protection scope of this utility model. Therefore, the protection scope of this utility model patent should be determined by the appended claims.

Claims

1. A drive module for a front derailleur, comprising a first housing (100) and a second housing (200) that are interlocked, characterized in that, The driver module also includes: Connector (300), the connector (300) is fixed inside the first housing (100), and the connector (300) is integrated with a plurality of conductive springs (310) arranged side by side. The first connector (400) has multiple terminals, and the multiple terminals are electrically connected to the multiple conductive springs (310) one by one. A circuit board (500) is fixed inside the second housing (200), and a plurality of conductive sheets (510) are arranged side by side on the side of the circuit board (500) facing the connector (300). When the first housing (100) and the second housing (200) are fastened together, the plurality of conductive sheets (510) and the plurality of conductive spring sheets (310) make electrical contact with each other, so that the circuit board (500) is electrically connected to the first connector (400).

2. The drive module for the front derailleur according to claim 1, characterized in that, It also includes a flexible flat cable (600), through which the plurality of conductive springs (310) are electrically connected to the plurality of terminals within the first connector (400).

3. The drive module for the front derailleur according to claim 1, characterized in that, The bottom of the first housing (100) is provided with a mounting groove (110), and the connecting seat (300) is pressed into the mounting groove (110).

4. The drive module for the front derailleur according to claim 1, characterized in that, The first housing (100) has a mounting hole (120) and the first connector (400) is fixed in the mounting hole (120).

5. The drive module for the front derailleur according to claim 4, characterized in that, The outer peripheral surface of the first connector (400) is provided with an annular groove (410), and the inner wall of the mounting hole (120) is provided with a protrusion (121) that mates with the annular groove (410).

6. The drive module for the front derailleur according to claim 4, characterized in that, The first connector (400) is fixedly connected to the inner wall of the mounting hole (120) by sealant.

7. The drive module for the front derailleur according to claim 1, characterized in that, A bracket (700) is fixed inside the second housing (200). A first positioning post (710) and a screw hole (720) are formed on the bracket (700). A first positioning hole (520) and a through hole (530) are provided on the circuit board (500). The first positioning post (710) is engaged with the first positioning hole (520). A locking member passes through the through hole (530) and is fixedly connected to the screw hole (720) to fix the circuit board (500) on the bracket (700).

8. The drive module for the front derailleur according to claim 7, characterized in that, The bracket (700) also has a plurality of second positioning posts (730), and the first housing (100) has a plurality of positioning grooves (130) that correspond one-to-one with the plurality of second positioning posts (730).

9. The drive module for the front derailleur according to claim 7, characterized in that, It also includes a drive assembly (800), which includes a drive motor (810) and a gear assembly (820) that is connected to the drive motor (810) in a transmission manner. The drive motor (810) and the gear assembly (820) are respectively fixed on opposite sides of the bracket (700), and the drive motor (810) is electrically connected to the circuit board (500).

10. The drive module for the front derailleur according to claim 7, characterized in that, It also includes a battery (900) electrically connected to the circuit board (500), a fixing groove (210) is provided in the second housing (200), the battery (900) is at least partially assembled in the fixing groove (210), and a plurality of ribs (140) are also protruding in the first housing (100). When the first housing (100) and the second housing (200) are fastened together, the ribs (140) abut against the side of the battery (900) away from the second housing (200).

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