Plastic snap-on rotary encoder

Abstract

The application provides a plastic foot type rotary encoder, which comprises a shaft center, a shaft sleeve, a positioning sheet, a dial, a plastic body and a support, the bottom of the plastic body is provided with at least two plastic feet extending downward, the plastic feet are buckled with buckle holes on a PCB, and the support is sleeved on the bottom of the plastic body and buckled with the shaft sleeve. The plastic foot type rotary encoder provided by the application can reduce the number of solder pads of the PCB and welding consumables, save production cost and improve the reliability of the product.

Description

Technical Field

[0001] This invention relates to the field of encoders, and more specifically to a plastic buckle-type rotary encoder. Background Technology

[0002] A rotary encoder is a sensor that converts mechanical rotational motion into electrical signals. It is primarily used to measure rotational speed, position, and direction, and is widely applied in motor control, robotics, and CNC machine tools. The core principle of a rotary encoder is to convert changes in shaft angle into pulses or digital codes through photoelectric or magnetoelectric conversion. They are mainly divided into incremental and absolute types.

[0003] refer to Figure 1 , Figure 2 Existing incremental encoder structures typically include a bushing 10, a shaft 20, a positioning plate 30, a dial 40, a plastic-coated body 50, and a metal bracket 60. The metal bracket 60 is located at the bottom of the plastic-coated body 50, and its top is equipped with a fastening strip 70, which fastens the bushing 10, connecting the bushing 10 and the plastic-coated body 50 into one unit. The bottom of the metal bracket 60 is equipped with solder feet 80. During encoder installation, the solder feet 80 are fastened to the PCB board and soldered to the pads on the PCB board with tin, thereby fixing the encoder to the PCB board.

[0004] The existing incremental encoders have the following drawbacks: 1. The metal bracket is connected to the PCB through solder feet, which means that the PCB must retain two copper foil pads, and the solder feet and copper foil pads must be soldered with tin. As the price of copper and tin rises, the production cost increases; 2. The solder feet of the metal bracket are prone to deformation and oxidation, which can cause the solder joints to become hollow or cold, affecting the installation stability and product reliability. Summary of the Invention

[0005] To overcome the shortcomings of existing technologies, this invention provides a plastic pin-type rotary encoder, which can reduce the number of solder pads on PCB boards and soldering consumables, save production costs, and improve product reliability.

[0006] To achieve the above objectives, the technical solution adopted by the present invention is as follows:

[0007] A plastic-coated rotary encoder includes a shaft, a bushing, a positioning plate, a dial, a plastic-coated body, and a bracket. The bottom of the plastic-coated body is provided with at least two downward-extending plastic feet, which are engaged with buckles on a PCB board. The bracket is fitted onto the bottom of the plastic-coated body and engages with the bushing.

[0008] Furthermore, the bottom of the plastic-coated body is provided with a positioning post, which is inserted into the positioning hole on the PCB board to improve assembly accuracy and connection stability.

[0009] Optionally, the plastic buckle is provided in two parts and symmetrically arranged on both sides of the plastic-coated body.

[0010] Furthermore, the plastic buckle is integrally formed with the plastic-coated body, resulting in high structural strength and simplified manufacturing process.

[0011] Furthermore, the bracket is provided with multiple rivet posts, and the bushing is provided with multiple rivet holes on both sides. The bracket is fitted onto the bottom of the plastic-coated body, and the rivet posts are riveted to the rivet holes.

[0012] Compared with the prior art, the present invention has the following beneficial technical effects:

[0013] 1. Significant cost reduction: The plastic-coated body is installed by fastening with the PCB board through plastic clips, eliminating the need for additional copper foil pads and solder on the PCB to connect with the traditional metal bracket solder feet, saving raw materials and welding processes, and reducing production and customer costs.

[0014] 2. Easy installation: Snap-fit ​​installation ensures precise positioning, eliminates the need for welding, simplifies the assembly process, and improves production efficiency.

[0015] 3. Stable and reliable: The one-piece molded plastic buckle and plastic positioning post fit together without deformation or oxidation, avoiding poor welding and empty welding, ensuring long-term stability, and will not have poor contact problems even in the humid environment of the south. Attached Figure Description

[0016] Figure 1 This is an exploded view of an incremental encoder using existing technology.

[0017] Figure 2 This is an overall diagram of an incremental encoder based on existing technology.

[0018] Figure 3 This is a structural diagram of a plastic buckle-type rotary encoder according to Embodiment 1.

[0019] Figure 4 This is an exploded view of a plastic buckle-type rotary encoder according to Embodiment 1.

[0020] The components are: 1. shaft; 2. bushing; 21. rivet hole; 3. positioning piece; 4. dial; 5. plastic-coated body; 51. plastic buckle foot; 52. positioning post; 6. bracket; 61. rivet post. Detailed Implementation

[0021] Numerous specific details are set forth in the following description to provide a full understanding of the invention. However, the invention can be practiced in many other ways different from those described herein, and those skilled in the art can make similar extensions without departing from the spirit of the invention. Therefore, the invention is not limited to the specific embodiments disclosed below.

[0022] Example 1

[0023] like Figure 3-4 As shown, a plastic buckle-type rotary encoder includes, from top to bottom, a shaft 1, a bushing 2, a positioning piece 3, a dial 4, a plastic-coated body 5, and a bracket 6.

[0024] The plastic-coated body 5 serves as the main support structure for the encoder. It is integrally injection molded from insulated engineering plastic and features a snap-fit ​​structure at the bottom, with two symmetrically arranged downward-extending plastic snap feet 51 and two positioning posts 52. This allows for direct snap-fit ​​installation with the snap holes / positioning holes on the PCB board. Compared to traditional metal brackets that require soldering to the PCB board, this snap-fit ​​installation structure eliminates the need for soldering on the PCB, reducing costs for the client. The insulating material also avoids the leakage hazards associated with metal brackets, improving electrical safety.

[0025] The bracket 6 is an auxiliary support component for the bottom snap-fit ​​structure. It has four rivet posts 61, which are first fitted onto the plastic-coated body and then riveted through the rivet holes 22 on the side of the bushing 2 to complete the overall encapsulation of the encoder.

[0026] The above are merely preferred embodiments of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. However, any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A plastic pin-type rotary encoder, characterized in that: It includes a shaft, a bushing, a positioning plate, a dial, a plastic-coated body, and a bracket. The bottom of the plastic-coated body is provided with at least two downward-extending plastic buckles, which are engaged with buckles on a PCB board. The bracket is fitted onto the bottom of the plastic-coated body and engages with the bushing.

2. The plastic buckle-type rotary encoder according to claim 1, characterized in that: The bottom of the plastic-coated body is provided with a positioning post, which is inserted into the positioning hole on the PCB board.

3. The plastic buckle-type rotary encoder according to claim 2, characterized in that: The plastic buckle is provided in two parts and is symmetrically arranged on both sides of the plastic-coated body.

4. The plastic buckle-type rotary encoder according to claim 3, characterized in that: The plastic buckle is integrally formed with the plastic-coated body.

5. The plastic pin-type rotary encoder according to claim 4, characterized in that: The bracket is provided with multiple rivet posts, and the bushing is provided with multiple rivet holes on both sides. The bracket is fitted onto the bottom of the plastic-coated body, and the rivet posts are riveted to the rivet holes.

Images