A relay socket with light guide post

Abstract

The application discloses a relay socket with a light guide column, which comprises a shell, a circuit board arranged in the shell, a light emitting source electrically connected with the circuit board, and a light guide column for guiding light emitted by the light emitting source out of the shell, one end of the light guide column is inserted into a through hole arranged in the shell, and the other end corresponds to the light emitting source; the shell is further provided with an axial limiting structure and a lateral limiting structure, the axial limiting structure limits the light guide column in the axial direction, and the lateral limiting structure limits the light guide column in the lateral direction. The application can simultaneously limit the light guide column in the axial and lateral directions, so that the light guide column cannot be displaced in the axial and lateral directions, and thus the light guide column cannot be dislocated or dropped due to vibration during assembly of the relay socket.

Description

Technical Field

[0001] This invention relates to a relay socket, and more particularly to a relay socket with a light guide post. Background Technology

[0002] A relay is an "automatic switch" that uses a small current to control a large current, playing a role in automatic adjustment, safety protection, and circuit switching in circuits. Relays are usually used in conjunction with relay sockets. A relay socket generally consists of a housing, a circuit board, lead clips for inserting the relay leads, an input section, and an output section. Existing relay socket circuit boards typically have indicator lights for power indication. Some of these indicator lights use plug-in LEDs, allowing the light emitted by the LEDs to directly pass through the housing. However, using plug-in LEDs makes automatic soldering and subsequent automatic assembly of the circuit board impossible. Therefore, some relay sockets integrate the indicator light into the housing and use a light guide to guide the light emitted by the indicator light out of the housing. Although a cylindrical light guide structure can achieve automated assembly, the lack of effective positioning of the light guide within the housing makes it prone to misalignment or even detachment during assembly due to vibration. Summary of the Invention

[0003] This invention addresses the technical problems existing in the prior art by providing a relay socket with a light guide post, which can prevent the light guide post from being misaligned or falling off due to vibration or impact during automated assembly.

[0004] The technical solution adopted by the present invention to solve its technical problem is as follows: a relay socket with a light guide post, including a housing, a circuit board disposed in the housing, a light source electrically connected to the circuit board, and a light guide post for guiding the light emitted by the light source out of the housing. One end of the light guide post is inserted into a through hole provided in the housing, and the other end corresponds to the light source. It also includes an axial limiting structure and a lateral limiting structure located in the housing. The axial limiting structure provides axial limiting for the light guide post, and the lateral limiting structure provides lateral limiting for the light guide post.

[0005] Furthermore, the axial limiting structure includes a first limiting part and a second limiting part disposed on the light guide post, the first limiting part abutting against the inner edge of the through hole, and the second limiting part abutting against the circuit board.

[0006] Furthermore, the first limiting part is an annular boss provided on the side of the light guide post and near one end of the light guide post.

[0007] Furthermore, the second limiting part is a first step provided on the side of the light guide post near its other end, and the first step abuts against the end of the circuit board facing the through hole.

[0008] Furthermore, the lateral limiting structure includes two buckles arranged side by side on the inner wall of the housing, the light guide post is located between the two buckles, and the barbs at the tails of the two buckles respectively lock the light guide post to prevent the light guide post from detaching from the two buckles.

[0009] Furthermore, the housing contains two parallel guide blocks on the wall where the lateral limiting structure is located, the light guide post is located between the two guide blocks, and the inner side of the tail of the two guide blocks is chamfered so that the distance between the tails of the two guide blocks gradually increases from the root to the tail of the guide blocks.

[0010] Furthermore, the light source is a surface-mount LED, and the other end of the light guide post is provided with a recess, on which the surface-mount LED is located; the recess is a second step, and there is a gap between the side of the second step on the axial direction of the light guide post and the surface-mount LED.

[0011] Furthermore, the number of circuit boards is several, including coil end circuit boards and load end circuit boards. The light source is electrically connected to the coil end circuit board and / or the load end circuit board. The axial limiting structure cooperates with the housing and / or the coil end circuit board. The housing is also provided with several first lead-out spring clips and input parts electrically connected to the coil end circuit board, and several second lead-out spring clips and output parts electrically connected to the load end circuit board.

[0012] Furthermore, the housing is provided with a plurality of first mounting slots and a plurality of second mounting slots. The input portion includes a plurality of input clamping springs, which are respectively mounted in corresponding first mounting slots. The output portion includes a plurality of output clamping springs, which are respectively mounted in corresponding second mounting slots. The inner side of the first mounting slot is provided with two opposing first limiting protrusions, and the two clamping pieces of the input clamping springs are located between the two first limiting protrusions. And / or, the inner side of the second mounting slot is provided with two opposing second limiting protrusions, and the two clamping pieces of the output clamping springs are located between the two second limiting protrusions. The first mounting slot is provided with a third limiting protrusion located between the root of the input clamping spring and the coil end circuit board. And / or, the second mounting slot is provided with a fourth limiting protrusion located between the root of the output clamping spring and the load end circuit board.

[0013] Furthermore, the housing has a first air inlet near each first mounting slot that communicates with the first mounting slot; the housing also has a second air inlet near each second mounting slot that communicates with the second mounting slot.

[0014] Furthermore, the housing includes a base and a cover plate, which are fixedly connected or detachably connected; the circuit board is mounted on the base, the through hole is formed by the base and the cover plate, and the base is provided with the lateral limiting structure.

[0015] Compared with the prior art, the present invention has the following beneficial effects:

[0016] 1. Since the present invention also includes an axial limiting structure and a lateral limiting structure located within the housing, the axial limiting structure provides axial limiting for the light guide post, and the lateral limiting structure provides lateral limiting for the light guide post, the present invention can simultaneously limit the light guide post in both axial and lateral directions, preventing the light guide post from shifting in the axial and lateral directions, thereby preventing the light guide post from misaligning or falling off due to vibration during the assembly process of the relay socket.

[0017] 2. The axial limiting structure includes a first limiting part and a second limiting part disposed on the light guide post. The first limiting part abuts against the inner edge of the through hole, and the second limiting part abuts against the circuit board, making the construction of the axial limiting structure relatively simple. In particular, when the first limiting part is the annular boss and the second limiting part is the first step, the construction of the first limiting part and the second limiting part is even simpler, easier to process, and no additional parts are introduced, thus not increasing costs or assembly processes.

[0018] 3. The lateral limiting structure includes two buckles arranged side by side on the inner wall of the housing, so that the lateral limiting structure is fixed to the housing as a whole, avoiding problems such as part loss and complicated assembly process caused by using separate parts.

[0019] 4. The relief portion is a second step, and there is a gap between the side of the second step on the axial direction of the light guide post and the surface mount light-emitting diode, which can prevent the surface mount light-emitting diode from being damaged or poorly soldered due to external force.

[0020] 5. The plurality of circuit boards include the load-side circuit board, which allows the present invention to avoid the use of metal welding or one-piece metal connection for the load side of the relay socket (metal welding makes it impossible to achieve automatic assembly and the metal parts are easily deformed, leading to assembly difficulties, and requires multiple molds for production, which increases product development costs and parts management costs; one-piece metal connection also makes it impossible to achieve automatic assembly, and the metal parts are also easily deformed, leading to assembly difficulties, and the material utilization rate of the parts is very low, leading to increased costs). Thus, the present invention can achieve automatic surface mounting of all parts of the relay socket, reduce the number of parts developed (reduce mold development), reduce costs, and also avoid parts deformation caused by excessively long or thin metal parts. Furthermore, the use of load-side circuit board welding in this invention can effectively avoid cold solder joints (cold solder joints and weak welds are common in metal parts welding); the use of coil-side and load-side circuit boards in this invention can increase the creepage distance between the relay coil and contacts, thereby increasing the withstand voltage between the relay coil and contacts; the use of coil-side and load-side circuit boards in this invention can reduce the temperature rise of the product because the copper-clad heat dissipation area of ​​the load-side circuit board is large and easy to dissipate heat, thus reducing the temperature rise of the product.

[0021] 6. The first limiting protrusion / second limiting protrusion can limit the opening angle of the two clamping plates of the input clamping spring / output clamping spring, thereby increasing the clamping force of the input clamping spring / output clamping spring and reducing the temperature rise.

[0022] 7. The third / fourth limiting protrusion is provided to prevent the force generated when the input / output clamping spring is inserted into the jumper from being directly transmitted to the coil end circuit board / load end circuit board, which could cause poor soldering or broken solder joints on the coil end circuit board / load end circuit board.

[0023] 8. The first air inlet / second air inlet can form a local circulating airflow at the corresponding first mounting slot / second mounting slot after the bridging piece of the input clamping spring / output clamping spring is energized, so as to carry the heat generated by the contact between the bridging piece and the input clamping spring / output clamping spring out of the housing, thereby reducing the temperature inside the housing.

[0024] The present invention will be further described in detail below with reference to the accompanying drawings and embodiments; however, the relay socket with light guide post of the present invention is not limited to the embodiments. Attached Figure Description

[0025] Figure 1 This is an exploded view of the present invention;

[0026] Figure 2 This is a three-dimensional structural diagram of the light guide column of the present invention;

[0027] Figure 3 This is a three-dimensional structural diagram of the base of the present invention;

[0028] Figure 4 yes Figure 3 An enlarged schematic diagram of part A in the middle;

[0029] Figure 5 yes Figure 3 Enlarged schematic diagram of part B;

[0030] Figure 6 yes Figure 3 An enlarged schematic diagram of section C;

[0031] Figure 7 This is a three-dimensional structural schematic diagram of the present invention;

[0032] Figure 8 This is the front view of the present invention (excluding the cover plate);

[0033] Figure 9 yes Figure 8 AA section view;

[0034] Figure 10 yes Figure 8 BB cross-sectional view;

[0035] Figure 11 yes Figure 8 CC section view;

[0036] Figure 12 yes Figure 11 An enlarged schematic diagram of section E in the middle;

[0037] Figure 13 yes Figure 8 An enlarged schematic diagram of part D in the middle. Detailed Implementation

[0038] For an example, please refer to [link / reference]. Figures 1-13 As shown, a relay socket with a light guide post according to the present invention includes a housing, a circuit board disposed within the housing, a light source electrically connected to the circuit board, and a light guide post 3 for guiding the light emitted by the light source out of the housing. One end of the light guide post 3 is inserted into a through hole 11 provided in the housing, and the other end corresponds to the light source. It also includes an axial limiting structure and a lateral limiting structure located within the housing. The axial limiting structure provides axial limiting for the light guide post 3, and the lateral limiting structure provides lateral limiting for the light guide post 3. Specifically, the housing includes a base 1 and a cover plate 2, which are fixedly connected or detachably connected. The circuit board is mounted on the base 1, and the through hole 11 is formed by the base 1 and the cover plate 2. The base 1 is provided with the lateral limiting structure.

[0039] In this embodiment, the axial limiting structure includes a first limiting part and a second limiting part disposed on the light guide post 3. The first limiting part abuts against the inner edge of the through hole 11, and the second limiting part abuts against the circuit board. Figure 2 As shown, the first limiting part is an annular boss 31 provided on the side of the light guide post 3 and near one end of the light guide post 3; the second limiting part is a first step 32 provided on the side of the light guide post 3 near its other end, and the first step 32 abuts against the end of the circuit board facing the through hole 11.

[0040] In this embodiment, as Figure 3 , Figure 4 As shown, the lateral limiting structure includes two latches 12 arranged side-by-side on the inner wall of the housing (specifically the base 1). The light guide post 3 is located between the two latches 12, and the two latches 12 are approximately located in the middle or near the middle of the light guide post 3. The barbs 121 at the tails of the two latches 12 respectively lock the light guide post 3 to prevent the light guide post 3 from detaching from the two latches 12. In this way, the light guide post 3 is limited in both the left-right direction and the front-back direction (i.e., the distribution direction of the base 1 and the cover plate 9).

[0041] In this embodiment, the housing (specifically the base 1) further includes two parallel guide blocks 13 arranged on the wall surface where the lateral limiting structure is located. The light guide post 3 is located between the two guide blocks 13, and the inner side of the tail of each guide block 13 is chamfered, so that the distance between the tails of the two guide blocks 13 gradually increases from the root to the tail. The root of the guide block 13 refers to the end of the guide block 13 that is connected to the wall surface, and the tail of the guide block 13 refers to the end of the guide block 13 that is away from the wall surface. Thus, guided by the two guide blocks 13, the light guide post 3 is more easily inserted between the two latches 12. The two guide blocks 13 are located between the two latches 12 and the circuit board, but are not limited to this. In other embodiments, the two guide blocks are located between the two latches and the through hole.

[0042] In this embodiment, the light source is a surface-mount LED 4, which is soldered onto the circuit board. The other end of the light guide post 3 has a recess, and the surface-mount LED 4 is located within this recess. Figure 2 As shown, the accommodating portion is a second step 33, which is located outside the first step 32, and the size of the second step 33 is larger than the size of the first step 32. There is a gap between the side of the second step 33 along the axial direction of the light guide post 3 and the surface-mount LED 4. This prevents damage or poor soldering of the surface-mount LED 4 due to external forces.

[0043] In this embodiment, the number of circuit boards is several, including a coil-end circuit board 5 and a load-end circuit board 6, which are distributed left and right. The light source (i.e., the surface-mount LED 4) is electrically connected to the coil-end circuit board 5, and the first step 32 abuts against the end of the coil-end circuit board 5 facing the through hole 11. The housing (specifically the base 1) is also provided with several first lead-out spring clips 7 and an input part electrically connected to the coil-end circuit board 5, and several second lead-out spring clips 8 and an output part electrically connected to the load-end circuit board 6. The load-end circuit board 6 forms an electrical connection bridge between the second lead-out spring clips 8 and the output part, that is, the second lead-out spring clips 8 form an electrical path with the output part through the load-end circuit board 6. When the relay is inserted into the relay socket, the coil lead of the relay is inserted into the first lead-out spring clip 7, and the lead of the relay's contact system is inserted into the second lead-out spring clip 8. The input section includes a plurality of first input clamping springs 9 and a plurality of first connecting pieces 20 electrically connected to the coil end circuit board 5, and the output section includes a plurality of second output clamping springs 10 and a plurality of second connecting pieces 30 electrically connected to the load end circuit board 6.

[0044] In this embodiment, the housing (specifically the base 1) is provided with a plurality of first mounting slots 14 and a plurality of second mounting slots 15. The plurality of input clamping springs 9 are respectively mounted in the corresponding first mounting slots 14, and the plurality of output clamping springs 10 are respectively mounted in the corresponding second mounting slots 15. Figure 5 , Figure 6 As shown, the inner side of the first mounting groove 14 is provided with two opposing first limiting protrusions 141, and the two clamping pieces of the input clamping spring 9 are located between the two first limiting protrusions 141; the inner side of the second mounting groove 15 is provided with two opposing second limiting protrusions 151, and the two clamping pieces of the output clamping spring 10 are located between the two second limiting protrusions 151; the first mounting groove 14 is provided with a third limiting protrusion 142 located between the root of the input clamping spring 9 and the coil end circuit board 5, and the third limiting protrusion 142 restricts the movement of the input clamping spring 9 toward the coil end circuit board 5; the second mounting groove 15 is provided with a fourth limiting protrusion 152 located between the root of the output clamping spring 10 and the load end circuit board 6, and the fourth limiting protrusion 152 restricts the movement of the output clamping spring 10 toward the load end circuit board 6.

[0045] In this embodiment, the housing (specifically the base 1) is provided with a first air inlet 16 near each first mounting groove 14, which communicates with the first mounting groove 14, such as Figure 3 As shown; the housing (specifically the base 1) has an air inlet 17 near each of the second mounting slots 15, communicating with the second mounting slot 15, such as Figure 13As shown. Thus, after the jumper connecting the input spring 9 and output spring 10 is energized, a localized circulating airflow is formed at the corresponding first mounting slot 14 / second mounting slot 15, such as... Figure 13 As shown in the figure, the arrows indicate the direction of airflow, which carries the heat generated by the contact between the bridging piece and the input clamping spring 9 / output clamping spring 10 out of the housing, thereby reducing the temperature inside the housing.

[0046] In this embodiment, one end of the input clamping spring 9 is bent toward the bottom surface of the first mounting groove 14 and extends to form a first pin 91. The tail of the first pin 91 is electrically connected to the coil end circuit board 5. One end of the output clamping spring 10 is bent toward the bottom surface of the second mounting groove 15 and extends to form a second pin 101. The tail of the second pin 101 is electrically connected to the load end circuit board 6.

[0047] This invention provides a relay socket with a light guide post 3, which can simultaneously limit the light guide post 3 axially and laterally, preventing the light guide post 3 from shifting along the axial (i.e., vertical), horizontal, and front-back directions. This prevents the light guide post 3 from misaligning or falling off due to vibration during the assembly process. Specifically, the first limiting part is the annular boss 31, and the second limiting part is the first step 32, simplifying the structure of the first and second limiting parts, facilitating processing, and avoiding the introduction of additional components, thus not increasing costs or assembly steps. The lateral limiting structure includes the two latches 12, making the lateral limiting structure integrally fixed with the housing, avoiding problems such as component loss and complex assembly processes caused by using separate parts.

[0048] The present invention discloses a relay socket with a light guide post, which adopts a dual circuit board structure consisting of a coil end circuit board 5 and a load end circuit board 6 (the coil end circuit board 5 corresponds to the magnetic circuit system of the relay, and the load end circuit board 6 corresponds to the contact system of the relay). This invention avoids the use of metal welding or integrated metal connection for the load end of the relay socket (i.e., the output part and the second lead spring are connected by metal parts). Thus, the present invention can realize automatic surface mounting of all parts of the relay socket, reduce the number of parts developed (reduce the development of molds), and also avoid the deformation of parts caused by excessively long or thin metal parts. Furthermore, the use of load-side circuit board welding in this invention can effectively avoid cold solder joints (cold solder joints and weak welds are common in metal parts welding); the use of coil-side and load-side circuit boards in this invention can increase the creepage distance between the relay coil and the contacts, thereby increasing the withstand voltage between the relay coil and the contacts; the use of coil-side and load-side circuit boards in this invention can reduce the temperature rise of the product because the copper-clad heat dissipation area of ​​the circuit board is large and heat dissipation is easy, thus reducing the temperature rise of the product.

[0049] The first limiting protrusion 141 and the second limiting protrusion 151 limit the angle between the two clamping plates of the input clamping spring 9 and the output clamping spring 10, thereby increasing the clamping force of the input clamping spring 9 and the output clamping spring 10 and reducing the temperature rise. The third limiting protrusion 142 and the fourth limiting protrusion 152 prevent the force generated when the input clamping spring 9 and the output clamping spring 10 are inserted into the jumper from being directly transmitted to the coil end circuit board 5 and the load end circuit board 6, which could cause poor soldering or broken solder joints on the coil end circuit board 5 and the load end circuit board 6.

[0050] The above embodiments are only used to further illustrate a relay socket with a light guide column according to the present invention. However, the present invention is not limited to the embodiments. Any simple modifications, equivalent changes and alterations made to the above embodiments based on the technical essence of the present invention shall fall within the protection scope of the technical solution of the present invention.

Claims

1. A relay socket with a light guide post, comprising a housing, a circuit board disposed within the housing, a light source electrically connected to the circuit board, and a light guide post for guiding the light emitted by the light source out of the housing; The housing includes a base and a cover plate, which are either fixedly connected or detachably connected. The circuit board is mounted on the base of the housing, and the base is provided with a plurality of mounting slots for mounting the circuit board. The circuit board is positioned and mounted in the corresponding mounting slot on the base. The light source is electrically connected to the circuit board and corresponds to the other end of the light guide post. Its features are: The housing has a through hole formed by the base and the cover plate for inserting one end of the light guide post, and the base of the housing is also provided with a lateral limiting structure located in the middle or near the middle of the light guide post, which can lock the light guide post. The light guide post is provided with a first limiting part and a second limiting part as an axial limiting structure. The first limiting part is provided on the side of the light guide post and close to one end of the light guide post. The second limiting part is provided on the side of the light guide post and close to the other end of the light guide post. The other end of the light guide post is provided with a second step as a relief part, which is located outside the second limiting part. During assembly, the light guide post abuts against the inner edge of the through hole of the housing through the first limiting part of the axial limiting structure, and abuts against the end of the circuit board assembled inside the housing facing the through hole through the second limiting part of the axial limiting structure to achieve axial limiting. The light guide post is also locked in the middle or near the middle position by the lateral limiting structure on the base to achieve lateral limiting. The assembled light guide post places the light source inside the receiving part to guide the light emitted by the light source out of the housing. The light guide post is simultaneously axially and laterally limited, and will not be displaced in the axial or lateral direction, and will not be misaligned or fall off due to vibration.

2. The relay socket with light guide post according to claim 1, characterized in that: The first limiting part is an annular boss provided on the side of the light guide post and close to one end of the light guide post; And / or, the second limiting part is a first step provided on the side of the light guide post near its other end, the first step abutting against the end of the circuit board facing the through hole.

3. The relay socket with light guide post according to claim 1, characterized in that: The lateral limiting structure includes two buckles arranged side by side on the inner wall of the housing, the light guide post is located between the two buckles, and the barbs at the tails of the two buckles respectively lock the light guide post to prevent the light guide post from detaching from the two buckles.

4. The relay socket with light guide post according to claim 3, characterized in that: Inside the housing, on the wall where the lateral limiting structure is located, there are two guide blocks arranged side by side. The light guide post is located between the two guide blocks, and the inner side of the tail of the two guide blocks is chamfered so that the distance between the tails of the two guide blocks gradually increases from the root of the guide block to the tail.

5. The relay socket with light guide post according to claim 1, characterized in that: The light source is a surface-mount light-emitting diode; The second step has a gap between the axial side of the light guide post and the patch light-emitting diode.

6. The relay socket with light guide post according to claim 1, characterized in that: The circuit boards are of several types, including coil-end circuit boards and load-end circuit boards. The light source is electrically connected to the coil-end circuit boards and / or the load-end circuit boards. The axial limiting structure cooperates with the housing and / or the coil-end circuit boards. The housing is also provided with several first lead-out spring clips and input parts electrically connected to the coil-end circuit boards, and several second lead-out spring clips and output parts electrically connected to the load-end circuit boards.

7. The relay socket with light guide post according to claim 6, characterized in that: The housing is provided with a plurality of first mounting slots and a plurality of second mounting slots. The input portion includes a plurality of input clamping springs, which are respectively mounted in corresponding first mounting slots. The output portion includes a plurality of output clamping springs, which are respectively mounted in corresponding second mounting slots. The inner side of the first mounting slot is provided with two opposing first limiting protrusions, and the two clamping pieces of the input clamping springs are located between the two first limiting protrusions. And / or, the inner side of the second mounting slot is provided with two opposing second limiting protrusions, and the two clamping pieces of the output clamping springs are located between the two second limiting protrusions. The first mounting slot is provided with a third limiting protrusion located between the root of the input clamping spring and the coil end circuit board. And / or, the second mounting slot is provided with a fourth limiting protrusion located between the root of the output clamping spring and the load end circuit board.

8. The relay socket with light guide post according to claim 7, characterized in that: The housing has a first air inlet near each first mounting slot and communicating with the first mounting slot; the housing has a second air inlet near each second mounting slot and communicating with the second mounting slot.

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