Relay contact sheet capable of reducing temperature rise
By setting two layers of heat sinks and an embossed structure on the relay contact piece, the problem of insufficient heat dissipation after miniaturization is solved, achieving more efficient heat dissipation and a longer service life.
Patent Information
- Application Number
- CN202520144481.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-01-22
- Publication Date
- 2026-01-09
- Estimated Expiration
- 2035-01-22
AI Technical Summary
Existing relays, after miniaturization, have insufficient heat dissipation capacity, resulting in excessive heat that softens or even melts the relay push rod and plastic parts, affecting lifespan and reliability.
Two layers of heat sinks are set on the relay contact piece, and embossing is set around the stationary spring to increase the heat dissipation area. The heat dissipation efficiency is improved by heat dissipation gaps and embossing.
Without increasing the size of the relay, the temperature of the contact pieces is effectively reduced, the service life of the relay is extended, the aging and oxidation corrosion of plastic parts are avoided, and the reliability is improved.
Smart Images
Figure CN223785094U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of relay technology, and more specifically, to a relay contact piece that can reduce temperature rise. Background Technology
[0002] In electromagnetic relays, the contacts are the main current-carrying components. When the circuit is connected, they generate a significant amount of heat due to the current they bear. Excessive heat can soften or even melt the relay push rod and other plastic parts, negatively impacting the overall lifespan of the relay. A common heat dissipation method is to increase the cross-sectional area of the relay contacts, but this increases the relay's size and cost.
[0003] Therefore, how to solve the problem of insufficient heat dissipation capacity after miniaturization of existing relays is a problem that urgently needs to be solved by those skilled in the art. Utility Model Content
[0004] In view of this, the purpose of this utility model is to provide a relay contact piece that can reduce temperature rise and effectively improve the heat dissipation effect of the contact piece without increasing its volume.
[0005] To achieve the above objectives, this utility model provides the following technical solution:
[0006] A relay contact piece that can reduce temperature rise includes: a moving spring and a stationary spring. The end of the moving spring with a moving contact has a structure with at least two layers of heat sinks, and a heat dissipation gap is provided between the two layers of heat sinks. The end of the stationary spring with a stationary contact has embossing, and the embossing surrounds the stationary contact.
[0007] Preferably, the embossing is provided along the edge of the head of the stationary spring to form a U-shaped structure with the opening facing the tail of the stationary spring.
[0008] Preferably, the head of the stationary spring is provided with a groove and a protrusion for forming embossing, the groove and the protrusion extending along the width direction of the head of the stationary spring to the outer edge of the head of the stationary spring, and the groove and the protrusion are arranged intersectingly.
[0009] Preferably, the cross-sectional shape of the groove along the thickness direction of the stationary spring is an inverted isosceles trapezoid, and the cross-sectional shape of the protrusion along the thickness direction of the stationary spring is an isosceles triangle.
[0010] Preferably, the stationary reed includes a first base, a first neck, and a first contact head connected sequentially from bottom to top. The first contact head has a first mounting hole in the middle for mounting a stationary contact, and the first base has a first electrical contact foot.
[0011] Preferably, the first base, the first neck, and the first contact head are located on the same plane.
[0012] Preferably, the middle of the first neck has an elongated hole extending vertically, the two sides of the end of the first neck connected to the first base have slots, and the two sides of the first base have positioning holes.
[0013] Preferably, the width of the first neck is smaller than the width of the first base and the first contact head, and the first contact pin is located at the end of the first base away from the first neck and extends in a direction away from the first neck.
[0014] Preferably, the moving reed includes a second base, a second neck, and a second contact head connected sequentially from bottom to top. The second contact head has a second mounting hole in the middle for mounting a moving contact. The second base has a second contact pin on one side, which extends in a direction away from the second neck. The end of the second neck that connects to the second base has a bend so that the second contact head is set at an angle to the plane where the second base is located.
[0015] Preferably, the end of the second contact head away from the second neck is bent to form a stacked portion that overlaps with itself, and a heat dissipation gap is provided on the side of the second contact head opposite to the stacked portion.
[0016] The relay contact piece provided by this utility model, which can reduce temperature rise, includes a moving spring and a stationary spring. The end of the moving spring with the moving contact has a structure with at least two layers of heat sinks, and a heat dissipation gap is provided between the two layers of heat sinks. By setting the heat dissipation gap, the heat dissipation area of the moving spring is increased, so that the temperature of the moving spring drops rapidly. Compared with the existing heat sink method, the heat sink is thinner and smaller in volume, which is conducive to heat exchange with air, thereby increasing heat exchange efficiency and improving heat dissipation effect. The end of the stationary spring with the stationary contact has embossing, which surrounds the stationary contact. By setting the embossing, the contact area between the stationary spring and the air is increased, that is, the heat dissipation area of the stationary spring is increased, so that the heat of the stationary spring is dissipated quickly.
[0017] The relay contact piece designed in the above manner can reduce the temperature rise of the contact piece without increasing the size of the relay, thereby extending the service life of the relay. Attached Figure Description
[0018] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the provided drawings without creative effort.
[0019] Figure 1 This is a schematic diagram of the structure of the relay contact piece that can reduce temperature rise provided by this utility model;
[0020] Figure 2 This is a schematic diagram of the structure of the movable spring provided by this utility model;
[0021] Figure 3 This is a schematic diagram of the structure of the stationary spring provided by this utility model;
[0022] Figure 4 This is a partially enlarged view of the stationary spring provided by this utility model.
[0023] Figure label:
[0024] 10-Moving contact; 20-Stationary contact; 30-Base; 40-Magnetic circuit assembly; 50-Armature; 60-Compression spring;
[0025] 1-Moving spring, 11-Second base, 12-Second neck, 13-Second contact head, 14-Second electrical contact pin, 15-Bending part, 16-Stacked part;
[0026] 2-Stationary reed, 21-First base, 22-First neck, 23-First contact head, 24-First contact pin;
[0027] 3- Heat dissipation gap;
[0028] 4- Embossing, 41- Groove, 42- Protrusion. Detailed Implementation
[0029] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.
[0030] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.
[0031] It should be noted that the directional terms such as "up" and "down" in the following text are defined based on the accompanying drawings in the instruction manual.
[0032] The core of the present utility model is to provide a relay contact piece that can reduce temperature rise, which can effectively improve the heat dissipation effect of the contact piece without increasing the volume of the relay contact piece.
[0033] Please refer to Figure 1 , a relay contact piece that can reduce temperature rise includes a moving contact spring piece 1 and a static contact spring piece 2.
[0034] Specifically, one end of the moving contact spring piece 1 where the moving contact 10 is provided has a structure with at least two layers of heat dissipation fins. There is a heat dissipation gap 3 between the two layers of heat dissipation fins. By setting the heat dissipation gap 3, the heat dissipation area of the moving contact spring piece 1 is increased, enabling the temperature of the moving contact spring piece 1 to drop rapidly. Compared with the existing heat dissipation method using a heat dissipation block, the heat dissipation fins have a thin thickness and a small volume, which is beneficial for heat exchange with air to increase the heat exchange efficiency and thus improve the heat dissipation effect. One end of the static contact spring piece 2 where the static contact 20 is provided is provided with embossing 4. The embossing 4 surrounds the static contact 20. By setting the embossing 4, the contact area between the static contact spring piece 2 and air is increased, that is, the heat dissipation area of the static contact spring piece 2 is increased, enabling the heat of the static contact spring piece 2 to disperse rapidly.
[0035] Among them, the embossing 4 surrounds the static contact 20. In one embodiment, the embossing 4 is in a "square" shape structure, surrounding the entire static contact 20, thereby effectively dissipating heat at any point around the static contact 20. This setting method has the best heat dissipation effect. Moreover, the embossing can directly extend to the mounting hole for mounting the static contact 20; in another embodiment, the embossing 4 is in a "U" shape structure, and the opening of the "U" shape structure can face any direction; in another embodiment, the embossing 4 is set in a "return" shape structure. In practical applications, there is no limitation on the overall shape presented by the embossing 4, as long as the technical effects of thinning and increasing the heat dissipation area can be achieved.
[0036] The relay contact piece that can reduce temperature rise set in the above manner can reduce the temperature of the contact piece without increasing the volume of the relay, and extend the service life of the relay.
[0037] Through structural improvement, it is possible to reduce the temperature rise of the moving contact spring piece 1 without increasing the volume, eliminating the drawbacks such as accelerating the aging of the internal plastic and insulating materials of the relay due to the relay temperature rise exceeding the requirements, causing difficulties in arc extinguishing due to oxidation and corrosion of the contacts, decay of the technical parameters of electrical components, and reduction of reliability.
[0038] In the above embodiment, the embossing 4 is arranged along the edge of the head of the static contact spring piece 2 to form a "U" shape structure with the opening facing the tail of the static contact spring piece 2. In this embodiment, the embossing 4 is in a "U" shape structure, and the opening of the "U" shape structure faces the tail of the static contact spring piece 2.
[0039] Please refer to Figure 2The stationary reed 2 includes a first base 21, a first neck 22 and a first contact head 23 connected sequentially from bottom to top. The first contact head 23 has a first mounting hole in the middle for mounting the stationary contact 20, and the first base 21 has a first power-connecting foot 24.
[0040] Among them, the head of the stationary reed 2 is the first contact head 23, and the tail of the stationary reed 2 is the first base 21.
[0041] It should be noted that the first base 21 is vertically mounted on the base 30 to connect the stationary spring 2 to the base 30, and the first electrical contact 24 is connected to the circuit board to connect the circuit. The stationary contact 20 is riveted into the first mounting hole of the stationary spring 2.
[0042] In the above situation, the first base 21, the first neck 22 and the first contact head 23 are located on the same plane.
[0043] It is understandable that the first base 21, the first neck 22 and the first contact head 23 are arranged on the same plane to facilitate processing and shaping.
[0044] Furthermore, the first contact head 23 is provided with embossing 4, which is located at the end away from the first neck 22. The embossing 4 is provided along the edge of the first contact head 23 to form a U-shaped structure with the opening facing the first neck 22.
[0045] It should be noted that the upper part of the stationary spring 2 is flattened and embossed with patterns 4 to increase the heat dissipation area. When the circuit is connected, the stationary spring 2 itself generates a large amount of heat due to the current. By setting patterns 4 on the stationary spring 2, the contact area between the stationary spring 2 and the air is increased, thereby increasing the heat dissipation area of the stationary spring 2 and allowing the heat of the stationary spring 2 to dissipate quickly. By placing patterns 4 around the stationary contact 20, the heat at that point can be dissipated quickly, preventing excessive heat from softening or even melting the relay push rod and other plastic parts.
[0046] In the above embodiment, the head of the stationary spring 2 is provided with a groove 41 and a protrusion 42 for forming the embossing 4. The groove 41 and the protrusion 42 extend along the width direction of the head of the stationary spring 2 to the outer edge of the head of the stationary spring 2, and the groove 41 and the protrusion 42 are intersecting. That is, the first contact head 23 is provided with a groove 41 and a protrusion 42 for forming the embossing 4. The groove 41 and the protrusion 42 extend along the width direction of the first contact head 23 to the outer edge of the first contact head 23, and the groove 41 and the protrusion 42 are intersecting. The cross-sectional shape of the groove 41 along the thickness direction of the first contact head 23 is an isosceles inverted trapezoid, and the cross-sectional shape of the protrusion 42 along the thickness direction of the first contact head 23 is an isosceles triangle.
[0047] It is understandable that a protrusion 42 is formed between two adjacent grooves 41. The cross-section of the protrusion 42 can be rectangular, isosceles triangle, arc, etc. Regardless of the shape, it can increase the contact area with air, thereby increasing the speed and effect of heat dissipation.
[0048] In the above embodiment, the middle of the first neck 22 is provided with an elongated hole extending vertically, the two sides of the end of the first neck 22 connected to the first base 21 are provided with slots, and the two sides of the first base 21 are provided with positioning holes.
[0049] It is understandable that slots are provided on both sides of the end where the first neck 22 is connected to the first base 21, an elongated hole extending vertically is provided in the middle of the first neck 22, and the width of the first neck 22 is smaller than the width of the first base 21 and the first contact head 23. The above structure can improve the flexibility of the moving spring 1, while also saving materials and reducing production costs.
[0050] The first base 21 has a positioning boss formed by stamping. The positioning boss can prevent the stationary spring 2 from loosening after assembly.
[0051] In a preferred embodiment, the width of the first neck 22 is smaller than the width of the first base 21 and the first contact head 23, and the first contact foot 24 is located at the end of the first base 21 away from the first neck 22 and extends in a direction away from the first neck 22.
[0052] It should be noted that when installing the stationary spring 2, the first power contact pin 24 is passed through the base 30 to connect the first power contact pin 24 to the circuit board to connect the circuit. At the same time, the first base 21 is inserted into the base 30 and fixed on the base 30.
[0053] Please refer to Figure 3 and Figure 4 The movable spring 1 includes a second base 11, a second neck 12, and a second contact head 13 connected sequentially from bottom to top. The second contact head 13 has a second mounting hole in the middle for mounting the movable contact 10. The second base 11 has a second contact pin 14 on one side, which extends away from the second neck 12. The end of the second neck 12 connected to the second base 11 has a bend 15 so that the second contact head 13 is set at an angle to the plane where the second base 11 is located.
[0054] Understandably, the moving contact 10 is riveted into the second mounting hole of the moving spring 1. When installing the moving spring 1, the second electrical contact 14 is passed through the base 30 to connect the second electrical contact 14 to the circuit board to turn on the circuit. At the same time, the second base 11 is inserted into the base 30 and fixed on the base 30.
[0055] In the above embodiment, the end of the second contact head 13 away from the second neck 12 is bent to form a stacked portion 16 that overlaps with itself, and a heat dissipation gap 3 is provided on the side of the second contact head 13 opposite to the stacked portion 16.
[0056] It should be noted that by providing a heat dissipation gap 3 on the second contact head 13 and the stacked portion 16, a number of thinned heat dissipation fins are formed between the second contact head 13 and the stacked portion 16, so as to achieve the purpose of rapid cooling.
[0057] In summary, the relay contact piece provided by this utility model, which can reduce temperature rise, increases the contact area between the stationary spring 2 and the air by flattening and embossing the stationary contact 20 around the stationary contact 2, so that heat can be dissipated quickly. By setting a heat dissipation gap 3 on the moving spring 1, which acts as a heat sink, the temperature of the moving spring 1 is reduced quickly, thereby improving the service life of the relay.
[0058] The temperature-reducing relay contact disclosed in the above embodiments is applied to a relay. The relay includes a base 30, a stationary spring 2, a moving spring 1, and a magnetic circuit assembly 40 vertically disposed on the base 30. The stationary contact 20 is riveted into the hole of the stationary spring 2, and the moving contact 10 is riveted into the hole of the moving spring 1. A push rod is provided between the moving spring 1 and the magnetic circuit assembly 40. One end of the push rod is connected to the moving spring 1, and the other end is connected to the armature 50. The armature 50 has an inverted L-shaped structure and is rotatably connected to the magnetic circuit assembly 40 through a compression spring 60. The bottom middle part of the push rod is slidably connected to the middle part of the base 30. In the relay structure, especially in the push rod type relay structure, the attraction between the moving contact 10 of the moving spring 1 and the stationary contact 20 of the stationary spring 2 is achieved by the armature 50 pushing the moving spring 1 under the action of electromagnetic attraction. During the electromagnetic attraction process, the flipping motion of the armature 50 is converted into a pushing motion on the moving spring 1, forcing the moving spring 1 to deviate from its initial position and be compressed, causing it to bend and deform in the direction opposite to the armature 50, thus generating a rebound potential energy upon release. When the electromagnetic attraction weakens and the rebound potential energy of the moving spring 1 is overcome, the moving spring 1 rebounds towards the armature 50.
[0059] When the coil pins of the magnetic circuit assembly 40 are energized, the excitation current of the coil generates magnetic flux. The magnetic flux forms a magnetic circuit through the iron core, armature 50, yoke, and working air gap, and generates electromagnetic attraction in the working air gap. When the excitation current rises to the set value, the electromagnetic attraction torque will overcome the counter-torque of the moving spring 1, causing the armature 50 to swing on the yoke, generating a pushing force on the push plate towards the moving spring 1. The push plate pushes the spring 1 laterally, causing the moving contact 10 of the moving spring 1 to close with the stationary contact 20 of the stationary spring 2. When the excitation current decreases to the set value, the counter-torque of the moving spring 1 is greater than the electromagnetic attraction torque, generating a pushing force on the push plate towards the coil. The push plate pushes the armature 50 laterally, causing the armature 50 to return to its initial state, and the moving contact 10 of the moving spring 1 to disconnect from the stationary contact 20 of the stationary spring 2.
[0060] It should be noted that in this specification, relational terms such as first and second are used only to distinguish one entity from several other entities, and do not necessarily require or imply any such actual relationship or order between these entities.
[0061] The various embodiments in this specification are described in a progressive manner, with each embodiment focusing on the differences from other embodiments. The same or similar parts between the various embodiments can be referred to each other.
[0062] The present invention provides a detailed description of a relay contact piece that can reduce temperature rise. Specific examples have been used to illustrate the principle and implementation of the present invention. The descriptions of the embodiments are merely for the purpose of helping to understand the method and core idea of the present invention. It should be noted that those skilled in the art can make various improvements and modifications to the present invention without departing from its principles, and these improvements and modifications also fall within the protection scope of the claims of the present invention.
Claims
1. A relay contact piece that can reduce temperature rise, characterized in that, include: The moving spring (1) and the stationary spring (2) are provided. The moving spring (1) has a structure with at least two heat sinks at one end with a moving contact (10) and a heat dissipation gap (3) between the two heat sinks. The stationary spring (2) has a embossed pattern (4) at one end with a stationary contact (20) and the embossed pattern (4) surrounds the stationary contact (20).
2. The relay contact piece with reduced temperature rise according to claim 1, characterized in that, The embossing (4) is set along the edge of the head of the stationary spring (2) to form a U-shaped structure with the opening facing the tail of the stationary spring (2).
3. The relay contact piece with reduced temperature rise according to claim 1, characterized in that, The head of the stationary spring (2) is provided with a groove (41) and a protrusion (42) for forming the embossing (4). The groove (41) and the protrusion (42) extend along the width direction of the head of the stationary spring (2) to the outer edge of the head of the stationary spring (2), and the groove (41) and the protrusion (42) are arranged to intersect.
4. The relay contact piece with reduced temperature rise according to claim 3, characterized in that, The groove (41) has an isosceles inverted trapezoidal cross-section along the thickness direction of the stationary spring (2), and the protrusion (42) has an isosceles triangle cross-section along the thickness direction of the stationary spring (2).
5. The relay contact piece with reduced temperature rise according to claim 1, characterized in that, The stationary reed (2) includes a first base (21), a first neck (22) and a first contact head (23) connected sequentially from bottom to top. The first contact head (23) has a first mounting hole in the middle for mounting the stationary contact (20), and the first base (21) has a first power-connecting foot (24).
6. The relay contact piece with reduced temperature rise according to claim 5, characterized in that, The first base (21), the first neck (22) and the first contact head (23) are located on the same plane.
7. The relay contact piece with reduced temperature rise according to any one of claims 5 or 6, characterized in that, The first neck (22) has an elongated hole extending vertically in the middle, and slots are provided on both sides of the end of the first neck (22) that is connected to the first base (21). Positioning holes are provided on both sides of the first base (21).
8. The relay contact piece with reduced temperature rise according to claim 7, characterized in that, The width of the first neck (22) is smaller than the width of the first base (21) and the first contact head (23). The first contact foot (24) is located at the end of the first base (21) away from the first neck (22) and extends in a direction away from the first neck (22).
9. The relay contact piece with reduced temperature rise according to claim 1, characterized in that, The movable spring (1) includes a second base (11), a second neck (12), and a second contact head (13) connected sequentially from bottom to top. The second contact head (13) has a second mounting hole in the middle for mounting the movable contact (10). The second base (11) has a second power contact (14) on one side. The second power contact (14) extends in a direction away from the second neck (12). The end of the second neck (12) connected to the second base (11) has a bend (15) so that the second contact head (13) and the plane where the second base (11) are located are set at an angle.
10. The relay contact piece with reduced temperature rise according to claim 9, characterized in that, The second contact head (13) is bent at one end away from the second neck (12) to form a stacked portion (16) that overlaps with itself. The heat dissipation gap (3) is provided on the side of the second contact head (13) opposite to the stacked portion (16).