CN113936875B

CN113936875B - Chip resistor

Info

Publication number: CN113936875B
Application number: CN202111209491.7A
Authority: CN
Inventors: 张建桃; 陆建荣; 李进
Original assignee: Zhejiang Jiuwei Electronic Technology Co ltd
Current assignee: Zhejiang Jiuwei Electronic Technology Co ltd
Priority date: 2021-10-18
Filing date: 2021-10-18
Publication date: 2022-06-07
Anticipated expiration: 2041-10-18
Also published as: CN113936875A

Abstract

The invention discloses a chip resistor, which belongs to the field of resistors and comprises a limiting frame, at least one pair of supporting leg parts, a resistor body and an ejection part, wherein the supporting leg parts are arranged on the limiting frame; any pair of support leg parts are symmetrically distributed on two sides of the lower part of the resistor body and are contacted with the bottom end surface of the resistor body, and a tin liquid containing cavity is arranged on each support leg part; the limiting frame is fixedly connected between the upper end surfaces of each pair of leg parts, is positioned on the outer side of the resistor body, is connected with a pair of elastic limiting parts at the upper end of the limiting frame, and is symmetrically distributed around the resistor body; the ejection component is fixed between the two opposite side walls of the pair of elastic limiting parts and is positioned outside the resistor body; the resistor body can be detachably arranged in the limiting frame, the installation of the resistor body is firmer due to the limitation of the elastic limiting part, and meanwhile, the ejection part is designed, so that the resistor body can be more conveniently detached through the ejection part when the resistor body is damaged and needs to be detached.

Description

Chip resistor

Technical Field

The invention relates to the field of resistors, in particular to a chip resistor.

Background

At present, the chip resistor is fixed by directly connecting the electrode of the chip resistor with the circuit substrate through soldering tin liquid, when the chip resistor is damaged, the circuit substrate can not be used any more, when only the chip resistor is damaged on the circuit substrate and is forced to be discarded, great resource waste is caused, the consumption of the existing soldering tin liquid used on the circuit substrate is usually difficult to control, once the waste of the soldering tin liquid is caused, meanwhile, the short circuit failure of the resistor can be caused because the two sides of the soldering tin liquid are connected, and once the short circuit is insufficient, the connection is not firm, the chip resistor is easy to fall off to cause the open circuit phenomenon, and the work is influenced.

Disclosure of Invention

In view of the problems in the prior art, the present invention is directed to a chip resistor.

In order to solve the above problems, the present invention adopts the following technical solutions.

A chip resistor comprises a limiting frame, at least one pair of supporting leg parts, a resistor body and an ejection part; any pair of the support foot parts are symmetrically distributed on two sides of the lower part of the resistor body and are in contact with the bottom end surface of the resistor body, and a tin liquid containing cavity is arranged on each support foot part and is used for containing tin liquid so that each support foot part can be fixed on the circuit substrate; the limiting frame is fixedly connected between the upper end surfaces of each pair of leg parts, is positioned on the outer side of the resistor body, and is connected with a pair of elastic limiting parts which are symmetrically distributed around the resistor body; the limiting frame and the elastic limiting part are both made of insulating materials; the ejection component is fixed between the two opposite side walls of the pair of elastic limiting parts and is positioned outside the resistor body; when the push-out member is pressed toward the side close to the resistor, the pair of elastic restricting portions are expanded toward both outer sides, and the push-out member gives upward push-out force to the resistor.

Furthermore, the length, the width and the height of the limiting frame are matched with those of the resistor body, and the limiting frame is made of a non-deformable material.

Furthermore, the limiting frame comprises two opposite first side plates, two opposite second side plates and a pair of bottom plates; the two opposite first side plates and the two opposite second side plates are distributed at intervals and fixedly connected to form a square structure, the bottom plate is fixedly connected to the middle of the bottom end of the first side plate, intervals are formed between the two side walls of the bottom plate and the second side plates, and the supporting foot parts are installed in the intervals.

Further, elasticity restriction portion adopts the deformation material to make, and elasticity restriction portion includes first folded plate, second folded plate and the third folded plate that arrange in proper order including integrated into one piece, be the acute angle between first folded plate and the resistive element, be the obtuse angle between first folded plate and the second folded plate, third folded plate level sets up.

Further, the ejection part comprises a flexible strip, an ejection rod body and an ejection head; two ends of the flexible strip are respectively and fixedly connected with the middle parts of the pair of elastic limiting parts, and the flexible strip is in a convex state far away from the resistor body in a natural state; one end of the ejection rod body is fixedly connected with one side of the middle part of the flexible strip close to the resistor body, and the other end of the ejection rod body is connected with the ejection head; the ejection rod body is rotationally connected with the limiting frame; the ejection head is rotatably connected with the limiting frame, and the upper end of the ejection head is contacted with the lower end of the resistor body; when the flexible strip is pressed inwards to the side close to the resistor body, the ejection rod body moves to drive the ejection head to eject the resistor body.

Furthermore, the ejection rod body comprises a first rotating rod, a connecting rod and a second rotating rod which are sequentially distributed and are mutually rotatably connected, a first U-shaped frame fixedly connected with the limiting frame is arranged on the inner side of the first rotating rod, and a second U-shaped frame fixedly connected with the limiting frame is arranged on the inner side of the ejection head.

Furthermore, the resistor body comprises an insulating substrate, a resistance layer and two electrodes, the insulating substrate is located on the upper side of the resistance layer, the two electrodes are located on the lower side of the resistance layer and distributed on two sides of the insulating substrate, and the two electrodes are respectively in contact with the two leg parts.

Furthermore, the supporting foot part comprises a supporting column and a containing box, the supporting column is connected with the containing box, the lower end of the resistor body is in contact with the supporting column, and the tin liquid containing cavity is formed in the containing box and is communicated with the two ends of the tin liquid containing cavity.

Further, the accommodating box is in a triangular, square or round structure or other various structures.

Further, the support column with hold box sliding connection, the side of support column is equipped with the sliding tray, hold the side of box and be equipped with the slider, slider sliding connection in the sliding tray. The sliding block of the accommodating box slides from the lowest side to the highest side in the sliding groove by a distance which is not less than the height of the accommodating box.

Further, when the containing boxes on the two chip resistors are overlapped, the two tin liquid containing cavities 2-1 are communicated, and two flexible strips located on the side of the containing boxes cannot be abutted in a natural state, so that the resistor body in the chip resistor is not easy to jack up due to the flexible strips.

Compared with the prior art, the invention has the advantages that:

the resistor body is detachably mounted in the limiting frame, the installation of the resistor body is firmer due to the limitation of the elastic limiting portion, and meanwhile, the ejection part is designed, so that the resistor body can be more conveniently detached through the ejection part when the resistor body is damaged and needs to be detached.

Second, the resistive element downside of this scheme has the leg part, holds the chamber through the tin liquid and fills tin liquid and be fixed in on the circuit board in the leg part to accomplish the installation of resistive element on the circuit board.

Thirdly, the support leg part of this scheme has the support column and holds the box, holds the box support column relatively and reciprocates, when another chip resistor needs with this chip resistor connected, can place the box that holds on another chip resistor in this chip resistor's the box top that holds, instils into the tin liquid of two intercommunications and holds the chamber to the completion is to two chip resistor's connection.

When four, two chip resistor of this scheme are connected, the box that holds that is close to each other adds the time each other, and the lateral wall contactless under two flexible rectangular natural state that are close to near side each other to the resistive element in the chip resistor is difficult because of flexible rectangular by jack-up.

Fifthly, the gliding distance of the slider of the box that holds of this scheme is not less than the height that holds the box from the downside to the top in the spout for another holds the box and puts this back on holding the box, and another chip resistor removes the box that holds that needs to connect, and other holds the box and still can directly contact with circuit substrate.

Drawings

Fig. 1 is a schematic perspective view of embodiment 1 of the present invention;

FIG. 2 is a schematic view of the structure at A in FIG. 1;

FIG. 3 is a schematic front view of the ejector pin body of the present invention;

FIG. 4 is a schematic perspective view of the position limiting frame according to the present invention;

FIG. 5 is a schematic front view of the resistor according to the present invention;

FIG. 6 is a schematic top view of the present invention;

fig. 7 is a schematic perspective view of a leg member according to embodiment 2 of the present invention;

fig. 8 is a schematic front view of a leg member according to embodiment 2 of the present invention;

fig. 9 is a schematic structural diagram of example 2 in which two chip resistors according to the present invention are connected.

The numbering in the figures illustrates:

1, a limiting frame, 1-1 a first side plate, 1-2 a second side plate, 1-3 a bottom plate, 1a elastic limiting part, 11 a first folded plate, 12 a second folded plate and 13 a third folded plate;

2 support leg parts, 2-1 tin liquid containing cavities, 21 support columns, 22 containing boxes, 23 sliders and 24 sliding grooves;

3 a resistor, 31 an insulating substrate, 32 a resistor layer, 33 an electrode;

4 ejection components, 41 flexible strips, 42 ejection rod bodies, 421 first rotating rods, 4211 first U-shaped frames, 4212 second U-shaped frames, 422 connecting rods, 423 second rotating rods and 43 ejection heads.

Detailed Description

Example 1:

referring to fig. 1-6, a chip resistor includes a limiting frame 1, at least a pair of leg members 2, a resistor 3, and an ejection member 4; any pair of support leg parts 2 are symmetrically distributed on two sides of the lower part of the resistor body 3 and are contacted with the bottom end surface of the resistor body, a tin liquid containing cavity 2-1 is arranged on each support leg part 2, and the tin liquid containing cavity 2-1 is used for containing tin liquid so that the support leg parts 2 can be fixed on a circuit substrate; the limiting frame 1 is fixedly connected between the upper end surfaces of each pair of leg parts 2, the limiting frame 1 is positioned on the outer side of the resistor body 3, the upper end of the limiting frame 1 is connected with a pair of elastic limiting parts 1a, and the elastic limiting parts 1a are symmetrically distributed around the resistor body 3; the limiting frame 1 and the elastic limiting part 1a are made of insulating materials; the push-out member 4 is fixed between the opposite side walls of the pair of elastic regulation portions 1a and is positioned outside the resistor 3; when the push-out member 4 is pressed toward the resistor 3, the pair of elastic regulation portions 1a are expanded outward, and the push-out member 4 gives upward pushing force to the resistor 3.

Referring to fig. 4, the length, width and height of the limiting frame 1 are matched with those of the resistor 3, and the limiting frame 1 is made of a non-deformable material. The limiting frame 1 comprises two opposite first side plates 1-1, two opposite second side plates 1-2 and a pair of bottom plates 1-3; two opposite first side plates 1-1 and two opposite second side plates 1-2 are distributed at intervals and fixedly connected into a square structure, a bottom plate 1-3 is fixedly connected to the middle of the bottom end of the first side plate 1-1, intervals are reserved between two side walls of the bottom plate 1-3 and the second side plates 1-2, and a supporting leg component 2 is installed in the intervals.

Referring to fig. 5, the elastic restriction portion 1a is made of a deformable material, and the elastic restriction portion 1a includes a first fold plate 11, a second fold plate 12 and a third fold plate 13 which are integrally formed and sequentially arranged, an acute angle is formed between the first fold plate 11 and the resistor body 3, an obtuse angle is formed between the first fold plate 11 and the second fold plate 12, the third fold plate 13 is horizontally arranged, and a gap is formed between a vertical line L where a connection point of the second fold plate 12 and the third fold plate 13 is located and the resistor body 3, so that the resistor body 3 can be well put into the gap from the third fold plate 13.

Referring to fig. 2-3, the ejection member 4 includes a flexible strip 41, an ejection rod body 42, and an ejection head 43; two ends of the flexible strip 41 are respectively fixedly connected with the middle parts of the pair of elastic limiting parts 1a, and in a natural state, the flexible strip 41 is in a convex state far away from the resistor body 3; one end of the ejection rod body 42 is fixedly connected with one side of the middle part of the flexible strip 41 close to the resistor 3, and the other end is connected with the ejection head 43; the ejection rod body 42 is rotationally connected with the limit frame 1; the ejection head part 43 is rotatably connected with the limiting frame 1, and the upper end of the ejection head part 43 is contacted with the lower end of the resistor body 3; when the flexible strip 41 is pressed inward toward the resistor 3, the ejector rod body 42 moves to drive the ejector head 43 to eject the resistor 3.

Referring to fig. 3, one side of the ejection head 43 close to the resistor 3 is an arc-shaped surface, the ejection head 43 is an arc on an ellipse formed by taking the rotation point of the second U-shaped frame 4212 and the second rotating rod 423 as the center of a circle, it should be noted that the longest diameter of the ellipse is placed horizontally, and then the arc-shaped section obtained from the highest point can be convenient for obtaining the maximum moving height after the ejection head 43 rotates, the longer the horizontal diameter of the ellipse, the longer the arc-shaped section, the higher the moving height obtained, and the appropriate length is adopted according to the required moving height in practical application.

Referring to fig. 3, the ejector rod body 42 includes a first rotating rod 421, a connecting rod 422, and a second rotating rod 423 that are sequentially distributed and rotatably connected to each other, a first U-shaped frame 4211 fixedly connected to the limiting frame 1 is disposed inside the first rotating rod 421, and a second U-shaped frame 4212 fixedly connected to the limiting frame 1 is disposed inside the ejector head 43.

Referring to fig. 5, the resistor 3 includes an insulating substrate 31, a resistive layer 32 and two electrodes 33, the insulating substrate 31 is located on the upper side of the resistive layer 32, the two electrodes 33 are located on the lower side of the resistive layer 32 and distributed on two sides of the insulating substrate 31, and the two electrodes 33 are respectively in contact with the two leg members 2.

In the scheme, two ejection components 4 are adopted, and the two ejection components 4 are symmetrical about the limiting frame 1. When the resistor body 3 is installed, the pair of flexible strips 41 is pressed towards the middle part of the inner side, the flexible strips 41 prop the pair of elastic limiting parts 1a to the two outer sides, then the resistor body 3 can be put into the limiting frame 1 from the space between the pair of elastic limiting parts 1a, the flexible strips 41 are loosened slowly, the ejection head part 43 which is driven by the ejection rod body 42 and is ejected upwards returns, meanwhile, the pair of elastic limiting parts 1a are close, the first folded plate 11 presses the resistor body 3 downwards to enable the resistor body 3 not to be easily displaced, the resistor body 3 is contacted with the support leg part 2 on the lower side, and the chip resistor is connected with a circuit substrate for use by injecting tin liquid into the tin liquid containing cavity 2-1.

When the resistor body 3 needs to be detached, the pair of flexible strips 41 is pressed towards the middle of the inner side, the elastic limiting portion 1a is expanded, the first rotating rod 421 rotates, the second rotating rod 423 is driven to rotate through the connecting rod 422, the ejection head 43 is driven to rotate, the highest point of the ejection head 43 moves upwards relative to the initial position after the ejection head rotates, the initial position is in contact with the lower side of the resistor body 3, an upward ejecting force is formed on the resistor body 3 after the ejection head moves upwards, meanwhile, the expanded elastic limiting portion 1a reduces the upward movement limitation on the resistor body 3, and therefore the resistor body 3 can be conveniently loosened and taken out.

Example 2:

referring to fig. 7-9, the leg member 2 includes a supporting column 21 and an accommodating box 22, the supporting column 21 is connected to the accommodating box 22, the lower end of the resistor 3 contacts the supporting column 21, and the solder receiving cavity 2-1 is disposed on the accommodating box 22 and has two ends penetrating through it. The containment box 22 is of triangular, square or circular configuration.

Specifically, the supporting column 21 and the accommodating box 22 may be slidably connected, a sliding groove 24 is provided on a side surface of the supporting column 21, a slider 23 is provided on a side end of the accommodating box 22, the slider 23 is slidably connected in the sliding groove 24, and when the supporting column 21 contacts the circuit substrate, the accommodating box 22 also contacts the circuit substrate under the action of gravity, and at this time, the slider 2 is located at the lowest side of the sliding groove 24.

When another chip resistor needs to be connected to the chip resistor, the accommodating box 22 on the other chip resistor can be placed above the accommodating box 22 of the chip resistor, please refer to fig. 9, it should be noted that the sliding distance of the accommodating box 22 from the lowest side to the highest side is not less than the height of the accommodating box 22, so that after the other accommodating box 22 is placed on the accommodating box 22, the other accommodating box 22 can be directly contacted with the circuit substrate except the accommodating box 22 which needs to be connected, and then the molten tin is dropped into the two molten tin accommodating cavities 2-1 which are overlapped and communicated, thereby completing the connection of the two chip resistors, and in order to ensure the tightness during the connection, the molten tin accommodating cavity 2-1 is preferably circular, so as to better ensure the communication between the upper molten tin accommodating cavity 2-1 and the lower molten tin accommodating cavity 2-1, so as to prevent the leakage of the molten tin, and when the other two molten tin accommodating cavities 2-1 are overlapped and communicated, it is noted that the length of the housing 22 is designed so that the flexible strips 41 of the two chip resistors close to each other do not interfere naturally.

Claims

1. A chip resistor, characterized in that: comprises a limit frame (1), at least one pair of supporting foot parts (2), a resistor body (3) and an ejection part (4);

any pair of the support foot parts (2) are symmetrically distributed on two sides of the lower part of the resistor body (3) and are in contact with the bottom end face of the resistor body, a molten tin containing cavity (2-1) is arranged on each support foot part (2), and each molten tin containing cavity (2-1) is used for containing molten tin so that each support foot part (2) can be fixed on a circuit substrate;

the limiting frame (1) is fixedly connected between the upper end faces of each pair of the leg parts (2), the limiting frame (1) is positioned on the outer side of the resistor body (3), the upper end of the limiting frame (1) is connected with a pair of elastic limiting parts (1 a), and the elastic limiting parts (1 a) are symmetrically distributed around the resistor body (3); the limiting frame (1) and the elastic limiting part (1 a) are both made of insulating materials;

the ejection component (4) is fixed between two opposite side walls of the pair of elastic limiting parts (1 a) and is positioned outside the resistor body (3);

when the push-out member (4) is pressed toward the side close to the resistor (3), the pair of elastic regulating portions (1 a) are expanded toward both outer sides, and the push-out member (4) gives upward push-out force to the resistor (3).

2. A chip resistor according to claim 1, wherein: the limiting frame (1) is matched with the resistor body (3) in length, width and height, and the limiting frame (1) is made of non-deformation materials.

3. A chip resistor according to claim 1, wherein: the limiting frame (1) comprises two opposite first side plates (1-1), two opposite second side plates (1-2) and a pair of bottom plates (1-3);

the two opposite first side plates (1-1) and the two opposite second side plates (1-2) are distributed at intervals and fixedly connected to form a square structure, the bottom plates (1-3) are fixedly connected to the middle parts of the bottom ends of the first side plates (1-1), intervals are reserved between the two side walls of the bottom plates (1-3) and the second side plates (1-2), and the supporting foot parts (2) are installed in the intervals.

4. A chip resistor according to claim 1, wherein: elasticity restriction portion (1 a) adopt the deformation material to make, and elasticity restriction portion (1 a) include first folded plate (11), second folded plate (12) and third folded plate (13) that integrated into one piece arranged in proper order, be the acute angle between first folded plate (11) and resistive element (3), be the obtuse angle between first folded plate (11) and second folded plate (12), third folded plate (13) level sets up.

5. A chip resistor according to claim 1, wherein: the ejection component (4) comprises a flexible strip (41), an ejection rod body (42) and an ejection head (43);

two ends of the flexible strip (41) are respectively and fixedly connected with the middle parts of the elastic limiting parts (1 a), and in a natural state, the flexible strip (41) is in a convex state far away from the resistor body (3);

one end of the ejection rod body (42) is fixedly connected with one side of the middle part of the flexible strip (41) close to the resistor body (3), and the other end of the ejection rod body is connected with the ejection head part (43); the ejection rod body (42) is rotationally connected with the limiting frame (1);

the ejection head (43) is rotatably connected with the limiting frame (1), and the upper end of the ejection head (43) is contacted with the lower end of the resistor body (3);

when the flexible strip (41) is pressed inward to the side close to the resistor body (3), the ejector rod body (42) moves to drive the ejector head (43) to eject the resistor body (3).

6. A chip resistor according to claim 5, wherein: ejector pin body (42) are including first dwang (421), connecting rod (422) and the second dwang (423) that distribute in proper order and mutual rotation connect, first dwang (421) inboard is rotated and is equipped with first U-shaped frame (4211) with spacing frame (1) fixed connection, and ejecting head (43) inboard is rotated and is equipped with second U-shaped frame (4212) with spacing frame (1) fixed connection.

7. A chip resistor according to claim 1, wherein: the resistor body (3) comprises an insulating substrate (31), a resistor layer (32) and two electrodes (33), the insulating substrate (31) is located on the upper side of the resistor layer (32), the two electrodes (33) are located on the lower side of the resistor layer (32) and distributed on two sides of the insulating substrate (31), and the two electrodes (33) are respectively in contact with the two support leg components (2).

8. A chip resistor according to claim 5, wherein: the supporting foot component (2) comprises a supporting column (21) and a containing box (22), the supporting column (21) is connected with the containing box (22), the lower end of the resistor body (3) is in contact with the supporting column (21), the tin liquid containing cavity (2-1) is arranged on the containing box (22), and two ends of the tin liquid containing cavity are communicated.

9. A chip resistor according to claim 8, wherein: the accommodating box (22) is of a triangular, square or circular structure.

10. A chip resistor according to claim 8, wherein: the supporting column (21) is in sliding connection with the accommodating box (22), a sliding groove (24) is formed in the side face of the supporting column (21), a sliding block (23) is arranged at the side end of the accommodating box (22), and the sliding block (23) is in sliding connection in the sliding groove (24).