Built-in electric control structure of sewing machine

Abstract

The utility model provides a built-in electric control structure of a sewing machine, and belongs to the technical field of sewing machines. The sewing machine solves the problem that the whole size of a sewing machine in the prior art is greatly increased due to the arrangement of an electric control device. According to the built-in electric control structure of the sewing machine, the sewing machine comprises a base, the base is provided with an installation cavity and connected with an end cover used for sealing the installation cavity, the end cover is provided with a receding hole communicated with the installation cavity, the electric control structure comprises a circuit board assembly arranged in the installation cavity, the circuit board assembly is connected to the end cover, and the circuit board assembly is connected with the circuit board assembly. The circuit board assembly comprises at least two circuit boards which are stacked and arranged at intervals, and the circuit boards are electrically connected. The sewing machine has the advantage that the problem that the whole size of an existing sewing machine is greatly increased due to the arrangement of an electric control device can be solved.

Description

Technical Field

[0001] This utility model belongs to the field of sewing machine technology and relates to a built-in electronic control structure for a sewing machine. Background Technology

[0002] With the development of sewing machine technology, competition in the sewing machine market is gradually shifting from traditional models to high-value-added mechatronic products. For example, Chinese patent literature discloses an electronic control device for a sewing machine (application number: 202121450533.1), comprising a sewing machine body and an electronic control device. The sewing machine body includes a base and a head. A connecting part at the right end of the head is fixedly connected to the base below. The electronic control device is fixedly connected to the outside of the connecting part. The sewing machine's drive motor is fixedly connected to the end of the base and located below the electronic control device. A gap is left between the electronic control device and the drive motor. The bottom of the electronic control device is equipped with a power interface and various drive data interfaces. The drive data interfaces of the electronic control device are connected to the drive motor, actuators, and sensors via wiring harnesses.

[0003] The electrical control device of this sewing machine has the following shortcomings during use: the electrical control device is connected to one side of the machine base, which makes the shape of the sewing machine irregular and unsightly, and also greatly increases the overall size of the sewing machine, which is not conducive to the packaging, storage and transportation of the whole sewing machine. Summary of the Invention

[0004] The purpose of this invention is to address the aforementioned problems in existing technologies by proposing a concealed electronic control structure for sewing machines. The technical problem this invention aims to solve is the significant increase in overall size caused by the inclusion of electronic control devices in existing sewing machines.

[0005] The objective of this utility model can be achieved through the following technical solutions:

[0006] A concealed electronic control structure for a sewing machine, the sewing machine including a base, characterized in that the base has a mounting cavity and is connected to an end cap for closing the mounting cavity, the end cap having a clearance hole communicating with the mounting cavity, the electronic control structure including a circuit board assembly disposed in the mounting cavity, the circuit board assembly being connected to the end cap, and the circuit board assembly including at least two circuit boards stacked and spaced apart, the circuit boards being electrically connected to each other.

[0007] This sewing machine features a built-in electronic control structure that creatively breaks down a large circuit board into multiple smaller circuit boards. These smaller circuit boards are electrically connected, stacked, and spaced apart within the mounting cavity of the base. This allows the circuit board assembly to be concealed within the mounting cavity and connected to the inside of the end cap while retaining the original functionality. The electronic control structure is neither protruding nor exposed. Simultaneously, the wiring harness connects to the circuit board assembly located within the mounting cavity through clearance holes, ensuring that the wiring harness is not exposed or only partially exposed. This facilitates connection, improves aesthetics, and, more importantly, facilitates the packaging, storage, and transportation of the entire sewing machine, thus solving the problem of the significantly increased overall size of existing sewing machines due to the inclusion of electronic control devices.

[0008] In the aforementioned concealed electronic control structure for a sewing machine, the inner surface of the end cover has several internally threaded posts. Between two adjacent circuit boards, several positioning posts corresponding one-to-one with the positions of the internally threaded posts are arranged. One end of each positioning post has an external thread and passes through one of the circuit boards to be threadedly connected to the corresponding internally threaded post. The other end of each positioning post has an internally threaded hole and is threadedly connected to a first bolt passing through the other circuit board. The structure is simple, easy to disassemble and assemble, and convenient for inspection, maintenance, and replacement.

[0009] In the aforementioned sewing machine-integrated electronic control structure, the opening of the mounting cavity is located at the bottom end of the base. The base has an annular stepped portion along the edge of the opening. The end cap abuts against the annular stepped portion and is connected to the base by several second bolts. This facilitates the assembly and disassembly of the end cap and the base, and also improves the stability of the connection between the end cap and the base, ensuring that the circuit board assembly embedded in the mounting cavity will not shake during sewing.

[0010] In the aforementioned concealed electrical control structure for a sewing machine, a circuit board adjacent to the end cover has several terminals, and multiple clearance holes are arranged opposite to each of the terminals. This allows the wire harness to connect to the terminals on the circuit board located within the mounting cavity through the clearance holes, ensuring that the wire harness is not exposed or only partially exposed, thus facilitating connection and improving aesthetics.

[0011] In the aforementioned sewing machine's built-in electrical control structure, a control panel and a switch panel are detachably connected to both sides of the outer wall of the base, respectively. The control panel and switch panel are electrically connected to the circuit board. Providing a control panel and switch panel on the outer wall of the base facilitates user operation and improves ease of use.

[0012] Compared with existing technologies, the advantages of the concealed electronic control structure of this sewing machine are as follows: the circuit board assembly of the concealed electronic control structure is hidden in the mounting cavity of the base and connected to the inside of the end cover, so that the electronic control structure does not protrude or protrude. At the same time, the wire harness is connected to the circuit board assembly located in the mounting cavity through the clearance hole, so that the wire harness is not exposed or only a small part is exposed. The connection is convenient and improves the aesthetics. More importantly, it is conducive to the packaging, storage and transportation of the entire sewing machine, thereby solving the problem that the overall size of existing sewing machines is greatly increased due to the setting of electronic control devices. Attached Figure Description

[0013] Figure 1 This is a three-dimensional structural diagram of the concealed electronic control structure of this sewing machine.

[0014] Figure 2 This is a three-dimensional structural diagram of the concealed electronic control structure of this sewing machine, viewed from below.

[0015] Figure 3 This is an exploded view of the base and end cap of the concealed electronic control structure of this sewing machine.

[0016] Figure 4 This is a three-dimensional structural diagram of the end cap of the concealed electronic control structure of this sewing machine.

[0017] Figure 5 This is a three-dimensional structural diagram of the circuit board assembly for the built-in electronic control system of this sewing machine.

[0018] Figure 6 This is a three-dimensional structural diagram of the positioning column of the built-in electronic control structure of this sewing machine.

[0019] In the diagram, 1 is the base; 1a is the mounting cavity; 1b is the annular step; 2 is the end cap; 2a is the clearance hole; 2b is the internal threaded post; 3 is the circuit board assembly; 3a is the circuit board; 3b is the positioning post; 3b1 is the internal threaded hole; 3c is the wiring terminal; 4 is the first bolt; 5 is the second bolt; 6 is the control panel; and 7 is the switch panel. Detailed Implementation

[0020] The following are specific embodiments of the present invention, which are described in conjunction with the accompanying drawings. However, the present invention is not limited to these embodiments.

[0021] A built-in electronic control structure for a sewing machine, referring to Figure 1-6The sewing machine includes a base 1, the base 1 having a mounting cavity 1a and an end cap 2 for closing the mounting cavity 1a connected thereto. The end cap 2 has a clearance hole 2a communicating with the mounting cavity 1a. The electrical control structure includes a circuit board assembly 3 disposed in the mounting cavity 1a. The circuit board assembly 3 is connected to the end cap 2, and the circuit board assembly 3 includes at least two stacked and spaced circuit boards 3a, which are electrically connected to each other.

[0022] Reference Figure 2 , Figure 3 , Figure 4 , Figure 5 and Figure 6 Specifically, the inner surface of the end cap 2 has a plurality of internally threaded posts 2b, and a plurality of positioning posts 3b corresponding one-to-one with the positions of the internally threaded posts 2b are provided between two adjacent circuit boards 3a. One end of the positioning post 3b has an external thread and passes through one of the circuit boards 3a to be threadedly connected to the corresponding internally threaded post 2b. The other end of the positioning post 3b has an internally threaded hole 3b1 and is threadedly connected to the first bolt 4 passing through the other circuit board 3a.

[0023] More specifically, the opening of the mounting cavity 1a is located at the bottom end of the base 1, and the base 1 has an annular step portion 1b on the edge of the opening. The end cap 2 abuts against the annular step portion 1b and is connected to the base 1 by a plurality of second bolts 5.

[0024] In this embodiment, the circuit board 3a adjacent to the end cover 2 preferably has a plurality of terminals 3c, and the clearance holes 2a have a plurality of terminals 3c and are arranged opposite to the terminals 3c one by one; preferably, the outer side wall of the base 1 is also detachably connected to the control panel 6 and the switch panel 7 respectively, and the control panel 6 and the switch panel 7 are electrically connected to the circuit board 3a respectively.

[0025] The following section explains the working principle of the built-in electronic control structure of this sewing machine:

[0026] During assembly, first place one circuit board 3a inside the end cap 2. Then, threaded ends of the four positioning posts 3b pass through the circuit board 3a and are threaded onto the corresponding internally threaded posts 2b on the end cap 2. Next, place the other circuit board 3a on the four positioning posts 3b and thread four first bolts 4 through the circuit board 3a and onto the corresponding internally threaded posts 2b of the positioning posts 3b. At this point, the connection between the circuit board assembly 3 and the end cap 2 is complete. Then, connect the end cap 2 with the circuit board assembly 3 to the base 1, that is, place the circuit board assembly 3 into the mounting cavity 1a of the base 1. Then, abut the end cap 2 against the annular step portion 1b and connect it to the base 1 with several second bolts 5. Disassembly is performed by reversing the operation. The structure is simple, easy to assemble and disassemble, and ensures that the circuit board assembly 3, which is hidden in the mounting cavity 1a, will not shake during sewing, resulting in good installation stability.

[0027] The specific embodiments described herein are merely illustrative examples illustrating the spirit of this utility model. Those skilled in the art to which this utility model pertains may make various modifications or additions to the described specific embodiments or use similar methods to substitute them, without departing from the spirit of this utility model or exceeding the scope defined by the appended claims.

Claims

1. An electric control structure for a sewing machine of the type comprising a base (1), characterized in that, The base (1) has a mounting cavity (1a) and is connected with an end cover (2) for closing the mounting cavity (1a), the end cover (2) has a clearance hole (2a) communicating with the mounting cavity (1a), the electronic control structure comprises a circuit board assembly (3) arranged in the mounting cavity (1a), the circuit board assembly (3) is connected to the end cover (2), and the circuit board assembly (3) comprises at least two circuit boards (3a) arranged in layers and at intervals, and the circuit boards (3a) are electrically connected.

2. The electric control structure for sewing machine according to claim 1, wherein The inner side of the end cover (2) has a plurality of internally threaded columns (2b), a plurality of positioning columns (3b) corresponding to the positions of the internally threaded columns (2b) are arranged between the adjacent two circuit boards (3a), one end of the positioning column (3b) has external threads and is threadedly connected with the corresponding internally threaded column (2b) through one of the circuit boards (3a), and the other end of the positioning column (3b) has an internally threaded hole (3b1) and is threadedly connected with a first bolt (4) penetrating through the other circuit board (3a).

3. The built-in electric control structure of a sewing machine according to claim 1 or 2, characterized in that, The opening of the mounting cavity (1a) is located on the bottom end of the base (1), the base (1) has an annular stepped portion (1b) on the edge of the opening, the end cover (2) abuts against the annular stepped portion (1b) and is connected with the base (1) through a plurality of second bolts (5).

4. The built-in electric control structure of a sewing machine according to claim 1 or 2, characterized in that, The circuit board (3a) adjacent to the end cover (2) has a plurality of wiring terminals (3c), and the clearance hole (2a) has a plurality of and is arranged opposite to the wiring terminals (3c) one by one.

5. The built-in electric control structure of a sewing machine according to claim 1 or 2, characterized in that, The outer side wall of the base (1) is detachably connected with a control panel (6) and a switch panel (7) on both sides, respectively, and the control panel (6) and the switch panel (7) are electrically connected with the circuit board (3a), respectively.

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