A patch type thermistor

Abstract

The utility model discloses a kind of patch type thermistor, it is related to patch type thermistor technical field, including positioning plate, resistance body, the side of resistance body is equipped with heat dissipation holder, the other side of resistance body is equipped with protective limit seat, protective limit seat is overall back type shape structure, this structure is made of wire clamp two and wire clamp one, locking assembly is arranged in recess;The utility model is through the setting of covering protection component, when locking assembly completes the locking of wire clamp one and wire clamp two, can slide closure plate, make the lateral section of the avoidance groove of closure plate bottom end and push piece is compatible and is embedded therein, in this way, closure plate can close the opening of recess, effectively block dust, chippings and other foreign matters into recess inside, avoid foreign matter to jam locking assembly in the activity of push piece;On the other hand, avoidance groove forms limit constraint to the lateral section of push piece, prevent push piece accidental sliding under vibration and other working conditions.

Description

Technical Field

[0001] This utility model relates to the field of surface mount thermistor technology, specifically to a surface mount thermistor. Background Technology

[0002] Surface mount thermistors, with their advantages of fast response and small size, are widely used in temperature detection and control applications of various electronic devices. To achieve convenient installation and reliable fixation of thermistors, various structural solutions have been proposed in related technical fields. For example, the utility model patent with publication number CN222507255U, entitled "A Surface Mount Thermistor," provides an installation structure using a wire clip and a locking component. Specifically, a groove on one side of the bottom end of the wire clip accommodates the locking component, thereby achieving a locking connection between the clip and the mounting base.

[0003] However, in practical applications, a significant defect has been found in this structure: the opening of the aforementioned groove is directly exposed to the external environment without any physical sealing structure to protect it. When the thermistor is installed in ordinary consumer electronic devices (such as home appliances and small controllers) or industrial equipment, common environmental dust, fine fibers, metal shavings, and aging debris generated during equipment operation may all enter the inside of the groove; especially when the equipment is under vibration (such as in automotive electronic devices, industrial control equipment near motors, etc.), foreign objects are more likely to fall into the groove under vibration.

[0004] From the perspective of usage impact, since the locking component inside the groove includes sliding parts such as a smooth rod, spring, and rod sleeve, if foreign objects intrude into the groove, it is very easy for the rod sleeve to jam when sliding along the smooth rod, thus affecting the overall locking / unlocking function of the locking component; in severe cases, the locking block may even be unable to properly engage or disengage from the limiting groove due to foreign object jamming, directly affecting the fixed stability of the thermistor and also causing inconvenience to the replacement operation of the thermistor. Utility Model Content

[0005] To solve the above-mentioned technical problems, a surface-mount thermistor is provided, which solves the problems existing in the background technology.

[0006] To achieve the above objectives, the technical solution adopted by this utility model is as follows: a surface mount thermistor, including a positioning plate and a resistor body disposed above the positioning plate, a heat dissipation clamp on one side of the resistor body and a protective limiting seat on the other side of the resistor body; The protective limiting seat has a U-shaped structure, which is composed of a U-shaped wire clamp two and a wire clamp one that are arranged in close fit. The wire clamp one has a groove through it on the side away from the card seat two, and a locking component is provided in the groove. The locking assembly includes two symmetrically distributed push pieces that are elastically slidably disposed inside the groove. The push pieces are L-shaped, with their lateral sections protruding beyond the outer side of the first wire clamp. The first wire clamp is also provided with a cover and protection assembly for closing the opening of the groove. The cover and protection assembly includes a closed plate linearly slidably disposed on one side of the clamp opposite to the card holder, and the bottom end of the closed plate is provided with an avoidance groove adapted to the transverse section of the push plate.

[0007] Preferably, the pusher is provided with an abutment strip below it that is horizontally fixed to the two side walls of the wire clamp, the bottom end of the sealing plate is vertically fixed with a connecting piece, the top end of the abutment strip is provided with an insertion slot corresponding to the connecting piece, and the outer wall of the abutment strip is provided with an installation hole that communicates with the insertion slot.

[0008] Preferably, a threaded sleeve is fixedly inserted through the bottom of the side of the sealing plate opposite to the wire clamp, and a stud is threaded through the inner thread of the threaded sleeve. An anti-slip pad is glued to the end of the stud facing the wire clamp.

[0009] Preferably, a rubber pusher is glued to the top of the side of the sealing plate opposite to the wire clamp, and the surface of the rubber pusher has anti-slip texture.

[0010] Preferably, wedge-shaped strips are provided on both sides outside the groove opening and vertically fixed to one side wall of the wire clamp, and the sealing plate is slidably disposed between the two wedge-shaped strips.

[0011] Compared with the prior art, the advantages of this utility model are as follows: By setting the cover and protection component, after the locking component completes the locking of wire clamp one and wire clamp two, the slidable sealing plate can be used to make the clearance groove at the bottom of the sealing plate match and embed into the transverse section of the push piece. In this way, on the one hand, the sealing plate can close the opening of the groove, effectively preventing dust, debris and other foreign objects from entering the inner side of the groove, and avoiding foreign objects from jamming the movement of the push piece in the locking component; on the other hand, the clearance groove forms a limiting constraint on the transverse section of the push piece, preventing the push piece from sliding accidentally under vibration and other working conditions, further enhancing the locking stability of the locking component and ensuring the long-term reliable operation of the surface mount thermistor. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the snap-fit ​​and constrained structure of the patch thermistor of this utility model; Figure 2 This is a schematic diagram of the unlocked structure of the patch thermistor of this utility model; Figure 3 This utility model Figure 1 Schematic diagram of the structure at point A in the middle; Figure 4 This is a schematic diagram of the stud and anti-slip pad structure of this utility model.

[0013] The numbers on the map are: 1. Positioning plate; 2. Card holder one; 3. Card holder two; 4. Surface mount thermistor; 5. Wire clamp one; 6. Wire clamp two; 7. Groove; 8. Push plate; 9. Limiting block; 10. Sealing plate; 11. Clearance groove; 12. Abutment strip; 13. Connecting piece; 14. Insertion port; 15. Mounting hole; 16. Wedge strip; 17. Rubber pusher pad; 18. Screw sleeve; 19. Stud; 20. Anti-slip pad. Detailed Implementation

[0014] The following description is intended to disclose the present invention so that those skilled in the art can implement it. The preferred embodiments described below are merely examples, and other obvious variations will occur to those skilled in the art. Example 1

[0015] Reference Figure 1-2 As shown, a surface mount thermistor includes a positioning plate 1 and a resistor body disposed above the positioning plate 1. A heat dissipation clamp is provided on one side of the resistor body, and a protective limit seat is provided on the other side of the resistor body. The resistor body includes a surface mount thermistor 4 and leads. One end of the push plate 8 is fixed to one side of the surface mount thermistor 4, and the other end of the push plate 8 is fixed with a terminal. The heat dissipation bracket includes a second bracket 3 and a first bracket 2, which are respectively clamped at the upper and lower ends of the surface mount thermistor 4. The first bracket 2 and the second bracket 3 are connected by a hinge, and several heat dissipation fins are fixed on the opposite sides of the first bracket 2 and the second bracket 3. The first bracket 2, the second bracket 3 and the heat dissipation fins are all made of copper. The heat dissipation fins at the bottom of the first bracket 2 are welded to the top surface of the positioning plate 1. The protective limit seat has a U-shaped structure, which consists of two U-shaped wire clamps, 6 and 5, which are arranged vertically and close together. The wire clamps 6 and 5 are respectively fixed to the card holders 3 and 2 via connecting seats. The side of the wire clamp 6 opposite to the wire clamp 5 is provided with an arc-shaped groove. The two arc-shaped grooves are aligned vertically and enclose to form a circular through hole. The circular through hole is connected to the inner side of the protective limit seat. The pin is locked in the circular through hole and the terminal is located in the inner side of the protective limit seat. By using the heat dissipation clamp and the protective limit seat, on the one hand, the heat dissipation clamp, with the help of copper bracket 1 2 and bracket 2 3 and heat dissipation fins, can efficiently dissipate the heat generated during the operation of the resistor, ensuring the accuracy of temperature detection. On the other hand, the heat dissipation clamp can be opened and closed by flipping bracket 2 3, which facilitates the placement and removal of the surface mount thermistor 4. On the other hand, the protective limit seat, through the circular through hole formed by wire clamp 1 5 and wire clamp 2 6, stably holds the push piece 8 and forms a protective space for the inner wiring terminals, preventing the wiring terminals from being interfered with or damaged by external factors. At the same time, it further enhances the structural stability of the resistor body after installation, enabling the thermistor to reliably perform temperature detection and signal transmission in various electronic devices for a long time.

[0016] Furthermore, referring to Figure 2 and Figure 3 As shown, a groove 7 is provided through the side of the wire clamp 5 away from the card holder 3, and a locking component is provided in the groove 7. The locking assembly includes two symmetrically distributed push pieces 8 that can be elastically slidably disposed inside the groove 7. The push pieces 8 are L-shaped, with their lateral sections protruding from the outside of the wire clamp 5. On the side of the two push pieces 8 that are far apart, there are corresponding limiting blocks 9 that are fixed to the top surface of the wire clamp 6. The limiting blocks 9 and the push pieces 8 can be connected by plugging. A horizontal bar is fixed between the inner walls on both sides of the groove 7. The longitudinal sections of the two push plates 8 are slidably sleeved on the horizontal bar. A spring is sleeved on the body of the horizontal bar between the two push plates 8. The two ends of the spring are respectively fixedly connected to the two push plates 8. A pusher 8 has an insert block fixed to one side facing the limiting block 9, and the limiting block 9 has an insertion slot corresponding to the insert block; By setting the locking component, when the horizontal sections of the two push plates 8 are pressed to bring them together, the vertical section of the push plate 8 slides along the crossbar and compresses the spring. At this time, the insert on the push plate 8 will disengage from the socket of the limit block, thereby releasing the locking state between the second wire clamp 6 and the first wire clamp 5, making it easier to open the first wire clamp 5 to install or replace the surface mount thermistor 4. After the operation is completed, the push plate 8 is released, and the spring's rebound force will push the two push plates 8 away from each other and reset. The insert can then be reinserted into the socket of the limit block 9, realizing the locking of the first wire clamp 5 and the second wire clamp 6, and ensuring the stability of the protection limit seat in holding the pins.

[0017] Furthermore, referring to Figure 3 As shown, it is worth noting that the wire clamp 5 is also equipped with a cover and protection component for closing the opening of the groove 7. The cover and protection assembly includes a closed plate 10 linearly slidably mounted on the side of the clamp 15 away from the card holder 23, and the bottom end of the closed plate 10 is provided with a relief groove 11 that is adapted to the transverse section of the push plate 8. By setting up the protective cover, after the locking assembly completes the locking of the first clamp 5 and the second clamp 6, the slidable sealing plate 10 can be used to make the clearance groove 11 at the bottom of the sealing plate 10 match and embed into the transverse section of the push piece 8. In this way, on the one hand, the sealing plate 10 can close the opening of the groove 7, effectively preventing dust, debris and other foreign objects from entering the inside of the groove 7, and avoiding foreign objects from jamming the movement of the push piece 8 in the locking assembly; on the other hand, the clearance groove 11 forms a limiting constraint on the transverse section of the push piece 8, preventing the push piece 8 from sliding accidentally under vibration and other working conditions, further enhancing the locking stability of the locking assembly and ensuring the long-term reliable operation of the surface mount thermistor 4.

[0018] Furthermore, referring to Figure 3 As shown, it is worth noting that both sides of the opening of the groove 7 are provided with wedge-shaped strips 16 that are vertically fixed to the side wall of the wire clamp 5, and the closing plate 10 is slidably disposed between the two wedge-shaped strips 16. By setting the wedge strips 16, two vertically symmetrically distributed wedge strips 16 form a sliding guide structure for the closed plate 10, which allows the closed plate 10 to slide stably along the wedge strips 16, ensuring that its sliding trajectory is accurate and avoiding deviation that would affect the sealing effect on the opening of the groove 7. Example 2

[0019] Reference Figure 3 As shown, it is worth noting that the pusher 8 is provided with an abutment strip 12 that is horizontally fixed to the side wall of the wire clamp 6, the bottom end of the sealing plate 10 is vertically fixed with a connecting piece 13, the top end of the abutment strip 12 is provided with an insertion slot 14 corresponding to the connecting piece 13, and the outer wall of the abutment strip 12 is provided with an installation hole 15 that communicates with the insertion slot 14. With the connection piece 13, the insertion port 14, and the mounting hole 15, when the sealing plate 10 slides down to the opening of the sealing groove 7, the connection piece 13 will be precisely inserted into the insertion port 14, achieving the initial positioning of the sealing plate 10 and the abutment strip 12. Then, a self-tapping screw is drilled into the mounting hole 15 to make it threadedly connected to the connection piece 13, thereby rigidly locking the connection piece 13 and the abutment strip 12. The self-tapping screw can tap itself in the connection piece 13 to form a tight engagement. The self-locking characteristic of the thread enhances the connection strength, effectively preventing the sealing plate 10 from loosening or shifting in a vibration environment, further ensuring the sealing reliability of the sealing plate 10 to the opening of the groove 7, and ensuring that the locking component is not affected by foreign objects intrusion for a long time. Example 3

[0020] Reference Figure 3 and Figure 4 As shown, it is worth noting that a threaded sleeve 18 is fixedly inserted through the bottom of the side of the wire clamp 5 on the back of the closed plate 10. A stud 19 is threaded through the inner thread of the threaded sleeve 18. An anti-slip pad 20 is glued to the end of the stud 19 facing the wire clamp 5. When the locking assembly needs to be operated, after the sliding closed plate 10 fully exposes the opening of the groove 7, the operator can manually move it along the internal thread of the threaded sleeve 18 towards the wire clamp 5 by turning the knob stud 19 until the anti-slip pad 20 at the end is tightly pressed against the side wall of the wire clamp 5. At this time, the friction between the anti-slip pad 20 and the wire clamp 5 can stably limit the upward sliding position of the closed plate 10, effectively preventing it from sliding down freely under its own weight and blocking the opening of the groove 7. This ensures that when the operator presses the push plate 8 to release the fixation between the wire clamp 5 and the wire clamp 6, the operating space is not disturbed by the closed plate 10, ensuring the smoothness and reliability of the unlocking action.

[0021] Furthermore, referring to Figure 3 As shown, it is worth noting that a rubber pusher sticker 17 is glued to the top of the side of the back of the closed plate 10, and the surface of the rubber pusher sticker 17 is provided with anti-slip texture. The rubber push pad 17 provides a convenient point of force for the operator to slide the sealing plate 10. The rubber material itself has good elasticity and coefficient of friction. Combined with the anti-slip texture on the surface, it can effectively increase the friction between the hand and the sealing plate 10, and avoid slippage during operation. Whether sliding the sealing plate 10 upward to expose the opening of the groove 7 or sliding the sealing plate 10 downward to close the groove 7, the operator can easily apply force by pressing the rubber push pad 17, making the sliding action more effortless and precise, and improving the ease of operation of the covering and protection component.

[0022] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A surface mount thermistor, comprising a positioning plate (1) and a resistor body disposed above the positioning plate (1), wherein a heat dissipation clamp is provided on one side of the resistor body and a protective limiting seat is provided on the other side of the resistor body; The protective limiting seat has a U-shaped structure. The structure is composed of a second wire clamp (6) and a first wire clamp (5) that are U-shaped and closely attached to each other. The first wire clamp (5) has a groove (7) through it on the side away from the second card seat (3). A locking component is provided in the groove (7). The locking assembly includes two symmetrically distributed push pieces (8) that are elastically slidably disposed inside the groove (7). The push pieces (8) are L-shaped, with their transverse sections protruding beyond the outer side of the wire clamp (5). The characteristic of this assembly is that... The wire clamp (5) is also provided with a cover and protection component for closing the opening of the groove (7); The cover protection assembly includes a closed plate (10) linearly slidably disposed on one side of the clamp (5) away from the card holder (3), and the bottom end of the closed plate (10) is provided with an avoidance groove (11) adapted to the transverse section of the push piece (8). The pusher (8) is provided with an abutment strip (12) that is horizontally fixed to the side wall of the wire clamp (6). The bottom end of the sealing plate (10) is vertically fixed with a connecting piece (13). The top end of the abutment strip (12) is provided with an insertion slot (14) corresponding to the connecting piece (13). The outer wall of the abutment strip (12) is provided with an installation hole (15) that communicates with the insertion slot (14). Both sides of the opening of the groove (7) are provided with wedge-shaped strips (16) that are vertically fixed to the side wall of the wire clamp (5), and the closing plate (10) is slidably disposed between the two wedge-shaped strips (16).

2. A surface-mount thermistor according to claim 1, characterized in that, The bottom of the closed plate (10) opposite to the wire clamp (5) is fixedly perforated by a threaded sleeve (18), and a stud (19) is threaded through the inner thread of the threaded sleeve (18). An anti-slip pad (20) is glued to one end of the stud (19) facing the wire clamp (5).

3. A surface-mount thermistor according to claim 1, characterized in that, The top of the closed plate (10) opposite to the side of the wire clamp (5) is glued with a rubber pusher (17), and the surface of the rubber pusher (17) is provided with anti-slip texture.

4. A surface-mount thermistor according to claim 1, characterized in that, Each of the two push pieces (8) is provided with a limiting block (9) fixed to the top surface of the second wire clamp (6) on the side that is far apart from each other. The limiting block (9) and the push piece (8) can be connected by plugging.

5. A surface-mount thermistor according to claim 1, characterized in that, A horizontal bar is fixed between the inner walls on both sides of the groove (7). The longitudinal sections of the two push pieces (8) are slidably sleeved on the horizontal bar. A spring is sleeved on the body of the horizontal bar between the two push pieces (8). The two ends of the spring are respectively fixedly connected to the two push pieces (8).

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