An ultra-small signal relay

Abstract

The present invention discloses an ultra-small signal relay comprising a housing and a plastic body, which is molded integrally with a static spring and a coil and accommodated within the housing. The plastic body has multiple lead terminals extending from internal inserts on the side walls corresponding to the coil axis, bent downwardly and attached to the corresponding side walls. Among the multiple lead terminals, the lead terminals at the edges corresponding to the two ends of the coil axis have protruding structures extending outward on one side of the width of the lead terminals, which are cut and mate with the inner side walls of the housing. The distal end of the protruding structure is curved. The present invention can automatically correct skewed lead terminals without increasing the size of the relay, ensuring that the lead terminals meet requirements for verticality or positional accuracy while simplifying the process of adjusting the verticality or positional accuracy of the lead terminals.

Description

Technical Field

[0001] The present invention relates to the technical field of relays, and in particular to an ultra-small signal relay used in high-frequency fields. Background Art

[0002] Existing ultra-small relays typically integrate a cut static spring with the coil, base, and other components through injection molding. The static spring and coil leads are formed by bending the cut sections after injection molding. These leads are typically located along either side of the coil axis. This bending can lead to some deviation in their verticality. For leads located along either side of the coil axis, the centrally located leads can be restrained by retaining walls formed on either side of the molded body to prevent them from skewing. However, for leads located at the side (i.e., at the edges of the coil axis), the mold cannot be modified to create retaining walls to control verticality due to the product's small size. This makes the leads located at the edges of the coil axis susceptible to skew. This verticality or positioning accuracy directly impacts the customer's relay installation process and can even cause poor soldering between the relay leads and the PCB, leading to customer complaints. Especially in the field of signal relays, which are very small and have numerous and densely packed terminals, the accuracy of the terminal verticality or position is particularly important. Currently, manufacturers generally achieve this accuracy through post-assembly testing and manual adjustment, resulting in poor consistency, low efficiency, and high labor costs.

[0003] On the other hand, achieving high-frequency signal transmission in traditional electromechanical relays and meeting high-frequency characteristic parameter design requirements requires the design and structural layout of high-frequency signal transmission components, such as the dynamic and static springs, to meet the design requirements for characteristic impedance. Simulation calculations are typically used to design characteristic impedance, but errors in simulation calculations and component processing can lead to certain deviations in the actual characteristic impedance. Currently, this deviation is typically minimized through strict mold processing requirements, which is technically difficult and costly. Summary of the Invention

[0004] The purpose of the present invention is to overcome the shortcomings of the prior art and provide an ultra-small signal relay. Through structural improvement, without increasing the volume of the relay, the lead-out terminal that appears crooked can be automatically corrected, thereby ensuring that the lead-out terminal meets the requirements of verticality or position accuracy and simplifying the process of adjusting the verticality or position accuracy of the lead-out terminal. On the other hand, the characteristic impedance can also be adjusted to compensate for the characteristic impedance deviation caused by simulation calculation and mold processing, thereby improving the high-frequency signal transmission performance and reducing the difficulty and cost of mold processing technology.

[0005] The technical solution adopted by the present invention to solve the technical problem is as follows: an ultra-small signal relay, comprising a housing and a plastic body in which a static spring and a coil are injection-molded into one piece; the side walls of the plastic body corresponding to the coil axis extend from internal inserts and are bent downward to be attached to the corresponding side walls, and a plurality of lead ends are provided; the plurality of lead ends are respectively cut into sheets, and the thickness of the sheet is attached to the corresponding side walls; the side walls of the plastic body corresponding to the coil axis are provided with a plurality of guides for aligning the corresponding A retaining wall for limiting the lead-out end; among the multiple lead-out ends, on the lead-out ends at the edge positions corresponding to the two ends of the coil axis, a protruding structure that can cooperate with the inner side wall of the shell and is formed by cutting is further extended outward on the outer side of the width of the lead-out end, and the end of the protruding structure is arc-shaped, so that when the lead-out end is tilted toward the outer side of the width, the corresponding lead-out end is guided through the cooperation between the inner side wall of the shell and the protruding structure of the lead-out end, and the inner side of the width of the corresponding lead-out end is pressed against the retaining wall at the corresponding position of the plastic body.

[0006] The static spring contains a static contact, and the static contact of the static spring is located on the top surface of the plastic body. The inner side wall of the shell is provided with a step facing downward, and the step of the inner side wall of the shell is matched with the top surface of the plastic body to isolate the contact position from the protruding structure of the lead-out end, thereby preventing plastic chips generated by friction between the protruding structure of the lead-out end and the shell from entering the contact area.

[0007] A plastic sealant is provided between the inner side wall of the shell and the outer side wall of the plastic body to fix the plastic chips.

[0008] The shell also accommodates a dynamic assembly in which a dynamic spring and an armature are injection-molded together. The dynamic assembly is adapted above the static contact. A boss for supporting the dynamic assembly is provided upwardly at the middle position of the side walls of the plastic body corresponding to both sides of the coil axis. The step of the inner side wall of the shell is arranged to surround the inner circumferential wall of the entire shell. An upward recessed section is provided in the step of the inner side wall of the shell at a position corresponding to the boss of the plastic body, so that when the step of the shell cooperates with the top surface of the plastic body, the recessed section of the step of the shell cooperates with the boss of the plastic body.

[0009] A recessed portion is provided in the middle of the two groups of moving and static contact mating positions on the top surface of the plastic body corresponding to the two ends of the coil axis, and a downward protruding section is provided in the step of the inner side wall of the shell corresponding to the recessed portion of the plastic body, so that when the step of the shell is mated with the top surface of the plastic body, the protruding section of the step of the shell is mated with the recessed portion of the plastic body.

[0010] Both ends of the protruding section of the step of the inner side wall of the shell are also provided with retaining walls extending along the coil axis direction for increasing the creepage distance.

[0011] Furthermore, it also includes a grounding shielding cover, which is sleeved outside the outer shell and covers the protruding structure of the lead-out end. The protruding structure of the lead-out end is also connected to the lead-out end with a cuttable strip, so that the area of ​​the protruding structure of the lead-out end can be changed by cutting the strip, thereby adjusting the characteristic impedance and compensating for the characteristic impedance deviation caused by simulation calculation and mold processing.

[0012] Compared with the prior art, the present invention has the following beneficial effects:

[0013] 1. The present invention employs a method in which, among the plurality of lead terminals, the lead terminals at the edges corresponding to both ends of the coil axis are provided with a protruding structure extending outwardly from the outer side of the width of the lead terminal, which is capable of cooperating with the inner side wall of the housing and is formed by cutting. The distal end of the protruding structure is arc-shaped. When the lead terminal is skewed toward the outer side of the width, the inner side wall of the housing cooperates with the protruding structure of the lead terminal to correct the corresponding lead terminal and make the inner side of the width of the corresponding lead terminal abut against the corresponding retaining wall of the plastic body. This structure of the present invention can automatically correct skewed lead terminals without increasing the size of the relay, ensuring that the lead terminals meet the requirements of verticality or positional accuracy and simplifying the process of adjusting the verticality or positional accuracy of the lead terminals. Furthermore, by adjusting the area of ​​the protruding structure, the distributed capacitance can be changed to adjust the characteristic impedance, thereby compensating for characteristic impedance deviation caused by simulation calculations and mold processing, improving high-frequency signal transmission performance, and reducing the difficulty and cost of mold processing technology.

[0014] 2. The present invention employs a downward-facing step on the inner sidewall of the housing, which mates with the top surface of the plastic body. This structure isolates the contact points from the protruding structure of the lead terminals, preventing plastic debris generated by friction between the protruding structure and the housing from entering the contact area, contaminating the active parts of the relay and affecting its normal operation.

[0015] The present invention will be further described in detail below with reference to the accompanying drawings and embodiments; however, the ultra-small signal relay of the present invention is not limited to the embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 1 is a schematic diagram of the three-dimensional structure of an embodiment of the present invention (the housing is not fully inserted);

[0017] Figure 2is a front view of an embodiment of the present invention (excluding the housing);

[0018] Figure 3 1 is a schematic diagram of an exploded perspective view of an embodiment of the present invention (bottom facing upward);

[0019] Figure 4 is a structural cross-sectional view of an embodiment of the present invention;

[0020] Figure 5 This is a schematic diagram of the lead-out terminal correction process of an embodiment of the present invention. Figure 1 ;

[0021] Figure 6 This is a schematic diagram of the lead-out terminal correction process of an embodiment of the present invention. Figure 2 ;

[0022] Figure 7 This is a schematic diagram of the lead-out terminal correction process of an embodiment of the present invention. Figure 3 ;

[0023] Figure 8 This is a cross-sectional view of an embodiment of the present invention in which the housing is not in place after the lead-out terminal is corrected;

[0024] Figure 9 is an exploded schematic diagram of a structure equipped with a ground shield cover according to an embodiment of the present invention;

[0025] Figure 10 is a schematic diagram of an embodiment of the present invention after the ground shield is assembled;

[0026] Figure 11 is a side view of an embodiment of the present invention (without the housing);

[0027] Figure 12 1 is a schematic diagram of the three-dimensional structure of the housing of an embodiment of the present invention (bottom facing upward);

[0028] Figure 13 1 is a front view of the housing of an embodiment of the present invention (bottom facing upward);

[0029] Figure 14 It is along Figure 13 Cross-sectional view along line AA. DETAILED DESCRIPTION

[0030] Example

[0031] See also Figures 1 to 10As shown, an ultra-small signal relay of the present invention comprises a housing 1 and a plastic body 2, which is accommodated in the housing and is injection-molded with a static spring 4 and a coil 5. The side walls 21 of the plastic body 2 on both sides corresponding to the coil axis extend from internal inserts (static spring leads and coil leads) and are bent downwardly to be attached to the corresponding side walls, and are provided with a plurality of lead ends 3. The plurality of lead ends 3 are respectively cut sheets, and the thickness of the sheet is attached to the corresponding side wall 21. The side walls 21 of the plastic body 2 on both sides corresponding to the coil axis are provided with a plurality of retaining walls for limiting the corresponding lead ends in the width direction. 22; Among the multiple lead-out terminals 3, on the lead-out terminals 31 at the edge positions corresponding to the two ends of the coil axis, a protruding structure 311 is further extended outward on the outer side of the width of the lead-out terminal 31, which can cooperate with the inner side wall of the shell 1 and is formed by cutting. The end 312 of the protruding structure 311 is arc-shaped, so that when the lead-out terminal 31 is tilted toward the outer side of the width, the corresponding lead-out terminal 31 is guided through the cooperation between the inner side wall of the shell 1 and the protruding structure 311 of the lead-out terminal 31, and the inner side of the width of the corresponding lead-out terminal 31 is pressed against the retaining wall 22 at the corresponding position of the plastic body 2.

[0032] In this embodiment, the static spring 4 contains a static contact 41, and the static contact 41 of the static spring is located on the top surface of the plastic body. The inner wall of the shell 1 is provided with a step 11 with the step surface facing downward. The step 11 of the inner wall of the shell 1 is matched with the top surface of the plastic body 2 to isolate the contact position from the protruding structure 311 of the lead-out terminal 31, thereby preventing plastic chips generated by the friction between the protruding structure 311 of the lead-out terminal 31 and the shell 1 from entering the contact area.

[0033] In this embodiment, plastic sealing glue is further provided between the inner side wall of the shell 1 and the outer side wall of the plastic body 2 to fix the plastic chips.

[0034] In this embodiment, the housing 1 also accommodates a dynamic component 6 in which a dynamic spring and an armature are injection-molded together. The dynamic component 6 is adapted above the static contact 41. The middle position of the side walls of the plastic body 2 corresponding to both sides of the coil axis is also provided with an upward boss 23 for supporting the dynamic component 6. The step 11 of the inner wall of the housing 1 is arranged to surround the inner circumferential wall of the entire housing; in the step 11 of the inner wall of the housing 1, an upward recessed section 12 is provided at a position corresponding to the boss 23 of the plastic body, so that when the step 11 of the housing 1 cooperates with the top surface of the plastic body 2, the recessed section 12 of the step of the housing 1 cooperates with the boss 23 of the plastic body 2.

[0035] In this embodiment, two sets of matching moving and static contacts are respectively provided on the top surfaces at both ends of the coil axis, and the two moving contacts corresponding to the same side of the coil axis form a seesaw structure; a recessed portion 24 is provided in the middle of the matching positions of the two sets of moving and static contacts on the top surfaces of the plastic body 2 corresponding to the two ends of the coil axis, and a downward protruding section 13 is provided in the step 11 of the inner side wall of the shell 1 corresponding to the recessed portion 24 of the plastic body 2, so that when the step 11 of the shell 1 cooperates with the top surface of the plastic body 2, the protruding section 13 of the step 11 of the shell 1 cooperates with the recessed portion 24 of the plastic body 2.

[0036] In this embodiment, retaining walls 14 for increasing the creepage distance are provided at both ends of the protruding section 13 of the step 11 of the inner wall of the housing 1 and extend along the coil axis.

[0037] Furthermore, it also includes a grounding shielding cover 7, which is mounted outside the outer shell 1 and covers the protruding structure 311 of the lead-out end 31. The protruding structure 311 of the lead-out end 31 is also connected to the lead-out end with a trimmable strip, so that the area of ​​the protruding structure 311 of the lead-out end can be changed by trimming the strip, thereby adjusting the characteristic impedance and compensating for the characteristic impedance deviation caused by simulation calculation and mold processing.

[0038] The present invention is a subminiature signal relay, which adopts a method in which, among the plurality of lead terminals 3, the lead terminals 31 at the edge positions corresponding to the two ends of the coil axis are provided with a protruding structure 311 formed by cutting and protruding outward on the outer side of the width of the lead terminal 31, which can cooperate with the inner side wall of the shell. The end 312 of the protruding structure 311 is arc-shaped, so that when the lead terminal 31 is tilted toward the outer side of the width, the shell 1 is assembled (such as Figure 1 、 Figure 5 In the direction of the arrow), the corresponding lead-out terminal 31 is aligned by the cooperation between the inner wall of the housing 1 and the protruding structure 311 of the lead-out terminal 31, and the inner side of the width of the corresponding lead-out terminal 31 is pressed against the retaining wall 22 at the corresponding position of the plastic body. This structure of the present invention can automatically straighten the skewed lead-out terminal 31 without increasing the volume of the relay, which not only ensures that the lead-out terminal meets the requirements of verticality or position accuracy, but also simplifies the adjustment process of the verticality or position accuracy of the lead-out terminal; on the other hand, by adjusting the area of ​​the protruding structure 311, the distributed capacitance (the lead-out terminal 31, the housing 1 and the ground shield 7 form a capacitance) can be changed to achieve the adjustment of the characteristic impedance, so as to compensate for the characteristic impedance deviation caused by simulation calculation and mold processing, improve the high-frequency signal transmission performance, and reduce the difficulty and cost of mold processing technology.

[0039] The present invention provides an ultra-small signal relay with a downwardly facing step 11 on the inner sidewall of the housing 1. The step 11 of the inner sidewall of the housing 1 engages with the top surface of the plastic body 2. This structure isolates the contact points from the protruding structure of the lead terminal, preventing plastic debris generated by friction between the protruding structure and the housing from entering the contact area, contaminating the relay's internal active components and affecting their proper operation.

[0040] The above is only a preferred embodiment of the present invention and does not limit the present invention in any form. Although the present invention has been disclosed as above in terms of a preferred embodiment, it is not intended to limit the present invention. Any person skilled in the art can, without departing from the scope of the technical solution of the present invention, use the technical content disclosed above to make many possible changes and modifications to the technical solution of the present invention, or modify it into an equivalent equivalent embodiment. Therefore, any simple modification, equivalent change and modification made to the above embodiments based on the technical essence of the present invention without departing from the content of the technical solution of the present invention should fall within the scope of protection of the technical solution of the present invention.

Claims

1. An ultra-small signal relay, comprising a housing and a plastic body, housed within the housing, in which a static spring and a coil are injection-molded into one piece. The plastic body has side walls corresponding to the coil axis extending from internal inserts and bent downwardly to abut against the corresponding side walls, with a plurality of lead terminals formed thereon. The lead terminals are each formed from a cut sheet, with the thick side of the sheet abutting against the corresponding side wall. The plastic body has a plurality of retaining walls provided on the side walls corresponding to the coil axis to limit the corresponding lead terminals in the width direction. The relay is characterized in that: Among the multiple lead-out terminals, on the lead-out terminals at the edge positions corresponding to the two ends of the coil axis, a protruding structure that can cooperate with the inner side wall of the shell and is formed by cutting is further extended outward on the outer side of the width of the lead-out terminal. The end of the protruding structure is arc-shaped, so that when the lead-out terminal tilts toward the outer side of the width, the corresponding lead-out terminal is guided to the right through the cooperation between the inner side wall of the shell and the protruding structure of the lead-out terminal, and the inner side of the width of the corresponding lead-out terminal is pressed against the retaining wall at the corresponding position of the plastic body.

2. The ultra-small signal relay according to claim 1, characterized in that: The static spring contains a static contact, and the static contact of the static spring is located on the top surface of the plastic body. The inner side wall of the shell is provided with a step facing downward, and the step of the inner side wall of the shell is matched with the top surface of the plastic body to isolate the contact position from the protruding structure of the lead-out end, thereby preventing plastic chips generated by friction between the protruding structure of the lead-out end and the shell from entering the contact area.

3. The ultra-small signal relay according to claim 2, characterized in that: A plastic sealant is provided between the inner side wall of the shell and the outer side wall of the plastic body to fix the plastic chips.

4. The ultra-small signal relay according to claim 2, characterized in that: The shell also accommodates a dynamic assembly in which a dynamic spring and an armature are injection-molded together. The dynamic assembly is adapted above the static contact. A boss for supporting the dynamic assembly is provided upwardly at the middle position of the side walls of the plastic body corresponding to both sides of the coil axis. The step of the inner side wall of the shell is arranged to surround the inner circumferential wall of the entire shell. An upward recessed section is provided in the step of the inner side wall of the shell at a position corresponding to the boss of the plastic body, so that when the step of the shell cooperates with the top surface of the plastic body, the recessed section of the step of the shell cooperates with the boss of the plastic body.

5. The ultra-small signal relay according to claim 4, characterized in that: A recessed portion is provided in the middle of the two groups of moving and static contact mating positions on the top surface of the plastic body corresponding to the two ends of the coil axis, and a downward protruding section is provided in the step of the inner side wall of the shell corresponding to the recessed portion of the plastic body, so that when the step of the shell is mated with the top surface of the plastic body, the protruding section of the step of the shell is mated with the recessed portion of the plastic body.

6. The ultra-small signal relay according to claim 5, characterized in that: Both ends of the protruding section of the step of the inner side wall of the shell are also provided with retaining walls extending along the coil axis direction for increasing the creepage distance.

7. The ultra-small signal relay according to claim 1, characterized in that: Furthermore, it also includes a grounding shielding cover, which is sleeved outside the outer shell and covers the protruding structure of the lead-out end. The protruding structure of the lead-out end is also connected to the lead-out end with a cuttable strip, so that the area of ​​the protruding structure of the lead-out end can be changed by cutting the strip, thereby adjusting the characteristic impedance and compensating for the characteristic impedance deviation caused by simulation calculation and mold processing.

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