Chip type safety resistor

Abstract

The utility model discloses a chip type safety resistor, which comprises a printed circuit board (PCB), a pressing mechanism, a support and a resistor, and a guide groove is arranged at the top of the side wall of the PCB. The pressing mechanism comprises a bottom plate moving along the guide groove, a first fixing plate arranged on the side wall of the bottom plate, a second fixing plate arranged on the side wall of the PCB and a shrinkage sleeve arranged between the first fixing plate and the second fixing plate, the support is arranged at the top of the bottom plate, a sliding groove is formed in the side wall of the support, a sliding block is arranged in the sliding groove, and the shrinkage sleeve is arranged between the first fixing plate and the second fixing plate. According to the utility model, through the arrangement of the guide groove, the bottom plate can be limited and guided, the bottom plate and a PCB are welded by utilizing tin soldering liquid, and the first fixing plate is pulled towards the resistor direction through the tension of the extension spring in the contraction sleeve, so that the first fixing plate is fixed to the resistor body, and the resistor body is fixed to the bottom plate. Therefore, the electrode on the support is pressed into the limiting groove of the electrical connection block, and the butt joint of the electrode and the electrical connection block is more accurate.

Description

Technical Field

[0001] The utility model relates to the technical field of resistors, in particular to a chip-type fuse resistor. Background Art

[0002] Chip resistor substrates, also known as business card-type fixed resistors, are a type of metal glass glaze resistor. They are made by mixing metal powder and glass glaze powder and printing them on a substrate using screen printing. They are resistant to moisture and high temperatures, have a small temperature coefficient, and can greatly save circuit space costs, making the design more refined.

[0003] Existing chip resistors are often small in size to save circuit space costs and are generally fixed to the PCB board by soldering. However, during this process, the chip resistor is placed flat on the PCB board, resulting in it being deflected by the solder wire and soldering iron when it comes into contact with the board, necessitating re-soldering. To address this issue, we have proposed a chip resistor. Utility Model Content

[0004] The purpose of this section is to summarize some aspects of the embodiments of the present invention and briefly introduce some preferred embodiments. Some simplifications or omissions may be made in this section and in the abstract and title of the utility model to avoid obscuring the purpose of this section, the abstract and the title of the utility model, and such simplifications or omissions shall not be used to limit the scope of the present invention.

[0005] In view of the above problems and / or problems existing in the use of chip-type fuse resistors, the present utility model is proposed.

[0006] Therefore, the purpose of the present invention is to provide a chip-type safety resistor, which can limit and guide the bottom plate through the setting of the guide groove, and use the soldering liquid to weld the bottom plate to the PCB. The heat dissipation groove maintains air circulation at the bottom of the resistor body to facilitate heat dissipation. The first fixed plate is pulled toward the resistor by the tension of the tension spring in the shrink sleeve, and then the electrode on the bracket is pressed into the limit groove of the electrical connection block to achieve electrical connection. The slider is limited and guided by the slide groove, and the position of the electrode is adjusted to make the docking with the electrical connection block more precise. After alignment, the slider is welded to the slide groove using the soldering liquid.

[0007] In order to solve the above technical problems, according to one aspect of the present invention, the present invention provides the following technical solutions:

[0008] A chip-type fuse resistor, comprising:

[0009] A PCB board, wherein a guide groove is provided on the top of the side wall of the PCB board;

[0010] A clamping mechanism, the clamping mechanism comprising a base plate that moves along the guide groove, a first fixing plate disposed on a side wall of the base plate, a second fixing plate disposed on a side wall of the PCB board, and a shrink sleeve disposed between the first fixing plate and the second fixing plate;

[0011] A bracket, the bracket being arranged on the top of the bottom plate, the side wall of the bracket being provided with a slide groove, a slider being provided inside the slide groove, and the side wall of the slider being provided with an electrode;

[0012] The resistor body has two ends provided with electrical connection blocks that cooperate with the electrodes.

[0013] As a preferred solution of the chip-type fuse resistor described in the present invention, a heat dissipation groove is provided on the side wall of the PCB board, and the opening edge of the heat dissipation groove is set as a rounded corner.

[0014] As a preferred solution of the chip-type fuse resistor described in the present invention, the resistor body is mounted on the top of the second fixing plate, and the side wall of the electrical connection block is provided with a limiting groove.

[0015] As a preferred solution of the chip-type fuse resistor described in the present invention, the side wall of the bracket is provided with a limiting groove connected to the sliding groove, and the side wall of the slider is provided with an adjustment plate extending from the limiting groove.

[0016] As a preferred solution of the chip-type fuse resistor described in the utility model, a tension spring is provided inside the shrink sleeve, a movable rod is provided at the front end of the tension spring, and the movable rod is coaxially matched with the shrink sleeve.

[0017] Compared with the prior art, the present invention has the following beneficial effects: this type of chip-type fuse resistor can limit and guide the bottom plate through the setting of the guide groove, and the bottom plate can be welded to the PCB using tin soldering liquid. The heat dissipation groove maintains air circulation at the bottom of the resistor body to facilitate heat dissipation. The first fixed plate is pulled toward the resistor by the tension of the tension spring in the shrink sleeve, and then the electrode on the bracket is pressed into the limit groove of the electrical connection block to achieve electrical connection. The slider is limited and guided by the slide groove, and the position of the electrode is adjusted to make the docking with the electrical connection block more accurate. After alignment, the slider is welded to the slide groove using tin soldering liquid. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the present invention will be described in detail below in conjunction with the accompanying drawings and detailed embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without inventive labor. Among them:

[0019] Figure 1 This is a schematic diagram of the overall structure of a chip-type fuse resistor of the present invention;

[0020] Figure 2 This is a schematic diagram of the structure of the compression mechanism of a chip-type fuse resistor of the present invention;

[0021] Figure 3 The utility model is a schematic diagram of the shrink sleeve structure of a chip-type fuse resistor.

[0022] 100, PCB board; 101, heat sink; 102, guide groove; 200, clamping mechanism; 210, bottom plate; 220, first fixing plate; 230, second fixing plate; 240, shrink sleeve; 241, movable rod; 300, bracket; 301, slide groove; 302, limit groove; 310, slider; 311, adjustment plate; 320, electrode; 400, resistor; 410, electrical connection block. DETAILED DESCRIPTION

[0023] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the specific embodiments of the present invention are described in detail below with reference to the accompanying drawings.

[0024] Secondly, the present invention is described in detail with reference to schematic diagrams. For ease of illustration, when describing the embodiments of the present invention, cross-sectional views of device structures may be partially enlarged to scale. Furthermore, the schematic diagrams are merely illustrative and should not limit the scope of protection of the present invention. Furthermore, in actual production, the three-dimensional dimensions of length, width, and depth should be included.

[0025] In order to make the purpose, technical solutions and advantages of the present invention more clear, the embodiments of the present invention will be described in further detail below with reference to the accompanying drawings.

[0026] The utility model provides a chip-type safety resistor. The bottom plate can be limited and guided by the setting of the guide groove, and the bottom plate is welded to the PCB by using tin soldering liquid. The heat dissipation groove maintains air circulation at the bottom of the resistor body to facilitate heat dissipation. The first fixed plate is pulled toward the resistor by the tension of the tension spring in the shrink sleeve, and then the electrode on the bracket is pressed into the limit groove of the electrical connection block to achieve electrical connection. The slider is limited and guided by the slide groove, and the position of the electrode is adjusted to make the docking with the electrical connection block more accurate. After alignment, the slider is welded to the slide groove by using tin soldering liquid.

[0027] Figure 1-Figure 3 The following is a schematic diagram of the structure of a chip type fuse resistor according to the present invention. Figure 1-Figure 3 In this embodiment, a chip-type fuse resistor includes a main body including a PCB board 100, a pressing mechanism 200, a bracket 300 and a resistor 400.

[0028] The PCB board 100 can limit and guide the bottom plate 210 through the provision of the guide groove 102, and the bottom plate 210 is soldered to the PCB using tin soldering liquid. The heat dissipation groove 101 maintains air circulation at the bottom of the resistor 400 body to facilitate heat dissipation. Specifically, the guide groove 102 is provided on the top of the side wall of the PCB board 100. In this embodiment, the side wall of the PCB board 100 is provided with a heat dissipation groove 101, and the opening edge of the heat dissipation groove 101 is set as a rounded corner;

[0029] The pressing mechanism 200 pulls the first fixing plate 220 toward the resistor 400 through the tension of the tension spring in the shrinking sleeve 240, thereby pressing the electrode 320 on the bracket 300 into the limiting groove 302 of the electrical connection block 410 to achieve electrical connection. Specifically, the pressing mechanism 200 includes a base plate 210 that moves along the guide groove 102, a first fixing plate 220 arranged on the side wall of the base plate 210, a second fixing plate 230 arranged on the side wall of the PCB board 100, and a shrinking sleeve 240 arranged between the first fixing plate 220 and the second fixing plate 230. In this embodiment, a tension spring is provided inside the shrinking sleeve 240, and a movable rod 241 is provided at the front end of the tension spring. The movable rod 241 is coaxially matched with the telescopic sleeve.

[0030] The bracket 300 limits and guides the slider 310 through the slide groove 301, adjusts the position of the electrode 320, and docks with the electrical connection block 410 more accurately. After alignment, the slider 310 is welded to the slide groove 301 using soldering liquid. Specifically, the bracket 300 is set on the top of the bottom plate 210, and the side wall of the bracket 300 is provided with a slide groove 301. The slider 310 is provided inside the slide groove 301, and the side wall of the slider 310 is provided with an electrode 320. In this embodiment, the side wall of the bracket 300 is provided with a limiting groove 302 connected to the slide groove 301, and the side wall of the slider 310 is provided with an adjustment plate 311 extending from the limiting groove 302.

[0031] The main body of the resistor 400 is in contact with the electrode 320 through the electrical connection block 410 to achieve electrical connection at both ends. Specifically, electrical connection blocks 410 that cooperate with the electrode 320 are provided at both ends of the main body of the resistor 400. In this embodiment, the main body of the resistor 400 is mounted on the top of the second fixed plate 230, and the side wall of the electrical connection block 410 is provided with a limiting groove 302.

[0032] Combine Figure 1-Figure 3, a chip-type fuse resistor 400 of this embodiment has a specific usage process as follows: the bottom plate 210 can be limited and guided by the setting of the guide groove 102, and the bottom plate 210 is welded to the PCB using tin soldering liquid. The heat dissipation groove 101 maintains air circulation at the bottom of the resistor 400 body to facilitate heat dissipation. The first fixed plate 220 is pulled toward the resistor 400 by the tension of the tension spring in the shrink sleeve 240, and then the electrode 320 on the bracket 300 is pressed into the limiting groove 302 of the electrical connection block 410 to achieve electrical connection. The slider 310 is limited and guided by the slide groove 301, and the position of the electrode 320 is adjusted to make the docking with the electrical connection block 410 more accurate. After alignment, the slider 310 is welded to the slide groove 301 using tin soldering liquid.

[0033] While the present invention has been described above with reference to specific embodiments, various modifications may be made and equivalent components may be substituted without departing from the scope of the present invention. In particular, as long as no structural conflicts exist, the various features of the embodiments disclosed herein may be combined with one another in any manner, and the omission of an exhaustive description of these combinations in this specification is solely for the sake of space and resource conservation. Therefore, the present invention is not limited to the specific embodiments disclosed herein, but encompasses all technical solutions within the scope of the claims.

Claims

1. A chip fuse resistor, characterized in that: include: A PCB board (100), wherein a guide groove (102) is provided at the top of a side wall of the PCB board (100); A pressing mechanism (200), the pressing mechanism (200) comprising a base plate (210) moving along a guide groove (102), a first fixing plate (220) arranged on a side wall of the base plate (210), a second fixing plate (230) arranged on a side wall of the PCB board (100), and a shrink sleeve (240) arranged between the first fixing plate (220) and the second fixing plate (230); A bracket (300), the bracket (300) being arranged on the top of the bottom plate (210), a slide groove (301) being arranged on a side wall of the bracket (300), a slider (310) being arranged inside the slide groove (301), and an electrode (320) being arranged on a side wall of the slider (310); The resistor (400) body has two ends provided with electrical connection blocks (410) that cooperate with the electrodes (320).

2. A chip-type fuse resistor (400) according to claim 1, characterized in that: A heat dissipation groove (101) is provided on the side wall of the PCB board (100), and the opening edge of the heat dissipation groove (101) is configured as a rounded corner.

3. A chip-type fuse resistor (400) according to claim 2, characterized in that: The resistor (400) body is mounted on the top of the second fixing plate (230), and a limiting groove (302) is provided on the side wall of the electrical connection block (410).

4. A chip-type fuse resistor (400) according to claim 3, characterized in that: The side wall of the bracket (300) is provided with a limiting groove (302) communicating with the sliding groove (301), and the side wall of the sliding block (310) is provided with an adjustment plate (311) extending from the limiting groove (302).

5. A chip-type fuse resistor (400) according to claim 4, characterized in that: A tension spring is provided inside the contraction sleeve (240), and a movable rod (241) is provided at the front end of the tension spring. The movable rod (241) is coaxially matched with the telescopic sleeve.

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