Direct-current relay with sampling signal pin

Abstract

The utility model discloses a DC relay with a sampling signal pin, comprising a housing and a plurality of static contacts, the static contacts pass through through holes correspondingly arranged on the housing, and the part of at least one static contact exposed outside the housing is connected with the sampling signal pin; and the sampling signal pin is in limiting connection with the outer surface of the shell. The sampling signal pin provided by the utility model is more convenient to assemble, can realize automatic assembly, and is stronger in universality. According to the utility model, the sampling signal pin is arranged outside the housing, and the sampling signal pin can be assembled after the relay is assembled.

Description

Technical Field

[0001] The utility model relates to the technical field of relays, in particular to a DC relay with a sampling signal pin. Background Art

[0002] A relay is an electronic control device that has a control system (also called an input circuit) and a controlled system (also called an output circuit). It is usually used in automatic control circuits. It is actually an "automatic switch" that uses a smaller current to control a larger current. Therefore, it plays the role of automatic regulation, safety protection, and circuit conversion in the circuit.

[0003] A DC relay is a type of relay, which includes two stationary contacts, a housing, and a moving contact assembly. The two stationary contacts are respectively inserted into the housing, and the upper portion of the stationary contacts is exposed outside the housing, and is used to connect with external electronic components. The lower portion of the stationary contacts is located inside the housing, and is in contact with or disconnected from the moving contact assembly located inside the housing. Some DC relays in the prior art have a sampling signal pin connected to the stationary contact, which is used to transmit the high-voltage signal in the stationary contact connected thereto to the external structure of the relay, so as to achieve sampling of a strong electrical signal (i.e., an electrical signal passing through the moving and static contacts, and also an electrical signal provided to the load). However, the DC relays in the prior art have the problem of being unable to achieve automated assembly when assembling the sampling signal pin. Utility Model Content

[0004] The utility model aims at the technical problems existing in the prior art and provides a DC relay with a sampling signal pin. Through structural improvement, the connection between the sampling signal pin and the housing can be assembled in an automated manner, making assembly more convenient.

[0005] The utility model solves the technical problem by adopting the following technical solution: a DC relay with a sampling signal pin, comprising a shell and a plurality of stationary contacts, wherein the stationary contacts are inserted through corresponding through holes of the shell, and a portion of at least one stationary contact exposed outside the shell is connected to the sampling signal pin; the sampling signal pin is limit-connected to the outer surface of the shell.

[0006] Furthermore, the sampling signal pin includes a lead-out portion and a connecting portion for connecting and cooperating with the stationary contact, and the lead-out portion and the connecting portion are fixed together; and the lead-out portion is at least partially nested and connected with the outer surface of the shell.

[0007] Furthermore, the lead-out portion and the outer surface of the shell are matched with a positioning structure, and the positioning structure includes a positioning hole and a positioning protrusion, the positioning hole is provided in one of the lead-out portion and the outer surface of the shell, and the positioning protrusion is provided in the other of the lead-out portion and the outer surface of the shell, the positioning protrusion is embedded in the positioning hole, and the two are in an interference fit.

[0008] Furthermore, chamfers are provided around the edges of the rear end of the positioning protrusion to facilitate the positioning protrusion to be embedded in the positioning hole; the positioning protrusion is interference fit with the positioning hole in the arrangement direction of the positioning structure and the static contact connected to the sampling signal pin.

[0009] Furthermore, the outer surface of the shell is provided with a groove into which the lead-out portion is at least partially embedded.

[0010] Furthermore, the outer surface of the shell is provided with a groove for at least partially embedding the lead-out portion, the positioning protrusion is provided on the shell and is located at the bottom of the groove, and the positioning hole is provided in the lead-out portion.

[0011] Furthermore, the two opposite groove walls of the groove are respectively provided with one or more limiting protrusions, and the limiting protrusions abut against the outer side surfaces corresponding to the lead-out portions; the two groove walls are located in the width direction of the groove, and the length direction of the groove is consistent with the arrangement direction of the static contact connected to the positioning structure and the sampling signal pin.

[0012] Furthermore, the lead-out portion is L-shaped, including a first side and a second side, the tail end of the first side is integrally connected to the connecting portion, and the first side is embedded in the groove and is provided with the positioning hole; the second side extends in a direction away from the outer surface of the shell where the groove is provided, and is provided with a connecting hole.

[0013] Furthermore, the connecting portion is in an arc shape and is fitted on the outer side surface of the stationary contact, and the connecting portion is connected and fixed to the stationary contact.

[0014] Furthermore, an arc-shaped flange portion is provided on the inner side surface of the through hole, and the flange portion and the connecting portion are combined to form an annular body sleeved outside the static contact.

[0015] Furthermore, a circle of annular bosses is provided on the outer side surface of the static contact, and the connecting portion and / or the flange portion overlaps the annular bosses in the axial direction of the through hole.

[0016] Furthermore, an arc-shaped limiting convex strip is provided on the inner side surface of the through hole corresponding to the connecting portion, and the limiting convex strip abuts against the outer side surface of the connecting portion.

[0017] Compared with the prior art, the utility model has the following beneficial effects:

[0018] 1. Since the sampling signal pin is limitedly connected to the outer surface of the housing, it does not need to be inserted into the housing, making the sampling signal pin of the utility model more convenient to assemble, and can realize automatic assembly, and has stronger versatility. In addition, the sampling signal pin of the utility model is located outside the housing, and the sampling signal pin can be assembled after the entire relay is assembled, which is more convenient to assemble.

[0019] 2. The lead-out portion of the sampling signal pin is at least partially nested and connected with the outer surface of the shell, so that the connection structure between the lead-out portion and the shell is relatively simple and easy to process and assemble.

[0020] 3. The lead-out portion and the housing are connected through the positioning hole and the positioning convex portion, which can effectively position the sampling signal pin, making the position of the sampling signal pin stable and reliable.

[0021] 4. The housing of the utility model is further provided with the groove to allow the lead-out part to be at least partially embedded, so as to achieve multiple position limits on the lead-out part, thereby further improving the positioning effect of the housing on the sampling signal pin, making the positioning of the sampling signal pin more reliable and stable. In particular, the two opposite groove walls of the groove are respectively provided with one or more position-limiting protrusions, which abut against the corresponding outer side surface of the lead-out part, so that the position of the lead-out part in the groove is more accurate and reliable.

[0022] 5. The connection part is in an arc shape and fits on the outer side of the static contact, which can reduce the processing accuracy requirements of the connection part, and also make the matching method between the connection part and the static contact simpler, which is easier to achieve when using automated assembly. In addition, when connecting the connection part and the static contact, since the connection part is divided into an arc shape and a non-continuous structure around the static contact part, the shape of the connection part can be corrected as needed to avoid the connection part from warping up, so that the connection part and the static contact are effectively connected and reliably contacted, thereby improving the connection strength and connection effect between the static contact and the sampling signal pin. At the same time, since the connection part does not need to surround the static contact in a full circle, the size of the connection part can be reduced to save materials and reduce preparation costs.

[0023] 6. The inner side surface of the through hole is provided with an arc-shaped flange portion, which is combined with the connecting portion to form an annular body sleeved outside the static contact, so that the overall appearance is more concise and beautiful, and the flange portion plays a certain limiting role on the connecting portion.

[0024] The utility model is further described in detail below in conjunction with the accompanying drawings and embodiments; however, the DC relay with a sampling signal pin of the utility model is not limited to the embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a three-dimensional structural schematic diagram of the utility model;

[0026] Figure 2It is a three-dimensional structural schematic diagram of the sampling signal pin of the utility model;

[0027] Figure 3 It is a top view of the sampling signal pin of the utility model;

[0028] Figure 4 It is a three-dimensional structural schematic diagram of the first shell of the utility model;

[0029] Figure 5 is a top view of the first shell of the utility model;

[0030] Figure 6 It is the front view of the utility model;

[0031] Figure 7 yes Figure 6 AA section view;

[0032] Figure 8 yes Figure 7 An enlarged schematic diagram of part D in the middle;

[0033] Fig. 9 It is a side view of the utility model;

[0034] Fig.10 yes Fig. 9 BB cross-sectional view;

[0035] Fig.11 yes Fig.10 The enlarged schematic diagram of part E in the middle;

[0036] Fig.12 yes Fig. 9 CC section view;

[0037] Fig.13 yes Fig.12 The enlarged schematic diagram of part F in the middle;

[0038] In the figure, 1, shell, 11, first shell, 111, through hole, 112, positioning protrusion, 113, groove, 114, limiting protrusion, 115, flange, 116, limiting convex strip, 12, second shell, 2, static contact, 21, annular boss, 3, sampling signal pin, 31, connecting part, 32, lead-out part 32, 321, positioning hole, 322, connecting hole. DETAILED DESCRIPTION

[0039] In the present utility model, the terms "first", "second", etc. are only used to distinguish similar objects, rather than to describe a specific order or sequence, and cannot be understood as indicating or implying relative importance. In the description, the orientation or position relationship indicated by "upper", "lower", "inner", "outer", "top / bottom", etc. is based on the orientation or position relationship shown in the drawings, which is only for the convenience of describing the present utility model, rather than indicating or implying that the device referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore cannot be understood as limiting the scope of protection of the present utility model. For those of ordinary skill in the art, the specific meanings of the above terms in this application can be understood according to the specific circumstances.

[0040] In addition, in the description of the present invention, unless otherwise specified, "plurality" refers to two or more than two. "And / or" describes the association relationship of associated objects, indicating that three relationships may exist. For example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone. The character " / " generally indicates that the previous and next associated objects are in an "or" relationship. In the description of the present invention, unless otherwise clearly specified and limited, the term "connection" can be a fixed connection, a detachable connection, or an integral connection, a mechanical connection, an electrical connection, a direct connection, an indirect connection through an intermediate medium, or a connection between the internal parts of two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0041] See also Figure 1-Figure 13 As shown, a DC relay with a sampling signal pin of the utility model includes a housing 1 and a plurality of stationary contacts 2, each of which is respectively inserted through a through hole 111 correspondingly arranged in the housing 1, and a portion of at least one stationary contact 2 exposed outside the housing 1 is connected to a sampling signal pin 3, the sampling signal pin 3 is located outside the housing 1, and the sampling signal pin 3 is limitedly connected to the outer surface of the housing 1. Specifically, the sampling signal pin 3 includes a lead-out portion 32 and a connecting portion 31 fixed to the lead-out portion 32 and used to connect and cooperate with the stationary contact 2. The lead-out portion 32 is at least partially nested and connected to the outer surface of the housing 1. The number of stationary contacts 2 is two or other numbers, and the number of sampling signal pins 3 corresponds one-to-one to the two stationary contacts 2, or the number of sampling signal pins 3 is one. In this embodiment, the number of stationary contacts 2 is specifically two, and the number of sampling signal pins 3 is also two.

[0042] In this embodiment, the lead-out portion 32 and the outer surface of the shell 1 are matched with a positioning structure, and the positioning structure includes a positioning hole 321 and a positioning protrusion 112. The positioning hole 321 is provided in one of the lead-out portion 32 and the outer surface of the shell 1, and the positioning protrusion 112 is provided in the other of the lead-out portion 32 and the outer surface of the shell 1. Specifically, the positioning hole 321 is provided in the lead-out portion 32, and the positioning protrusion 112 is provided in the shell 1. The positioning protrusion 112 is embedded in the positioning hole 321, and the two are in an interference fit. Specifically, the positioning protrusion 112 is in an interference fit with the positioning hole 321 in the arrangement direction of the positioning structure and the static contact connected to the sampling signal pin 3, but it is not limited to this. As a preferred structure, chamfers are provided on the edges around the tail end of the positioning protrusion 112, and the chamfers can provide guidance so that the positioning protrusion 112 can be easily embedded in the positioning hole 321. The positioning protrusion 112 is flat, specifically, the surrounding contour of the positioning protrusion 112 is elliptical, and the direction of the long axis of the positioning protrusion 112 is located in the arrangement direction of the static contact connected to the positioning structure and the sampling signal pin 3, therefore, the positioning protrusion 112 is mainly interference fit with the positioning hole 321 in the long axis direction, but not in the short axis direction. In other embodiments, the surrounding contour of the positioning protrusion 112 is circular or triangular, etc. The shape of the positioning hole 321 of the lead-out portion 32 matches the shape of the positioning protrusion 112. In other embodiments, the positioning protrusion is provided on the lead-out portion, and the positioning hole is provided on the outer surface of the shell.

[0043] As a preferred structure, the outer surface of the housing 1 is provided with a groove 113 for at least partially embedding the lead-out portion 32, and the groove 113 is connected to the through hole 111 at one end thereof facing the through hole 111. The positioning protrusion 112 is located at the bottom of the groove 113, specifically at the middle position of the bottom of the groove 113. The length direction and positioning structure of the groove 113 are consistent with the arrangement direction of the static contact connected to the sampling signal pin 3, so that after the positioning protrusion 112 is embedded in the positioning hole 321, the lead-out portion 32 can be limited in the length direction of the groove 113.

[0044] like Figure 4 , Figure 5 As shown, two groove walls opposite to each other in the width direction of the groove 113 are respectively provided with one or more limiting protrusions 114, and the limiting protrusions 114 abut against the corresponding outer side surfaces of the lead-out portion 32, so as to limit the lead-out portion 32 in the width direction of the groove 113. The limiting protrusions 114 are specifically rib structures and extend along the depth direction of the groove 113, but are not limited thereto. In other embodiments, the limiting protrusions 114 are convex bud structures. The number of the limiting protrusions 114 on the two inner side surfaces of the groove 113 is specifically two, but is not limited thereto.

[0045] In this embodiment, the lead-out portion 32 is L-shaped, including a first side and a second side, and the tail end of the first side is integrally connected to the middle of the connecting portion 31, but it is not limited thereto. In other embodiments, the first side can also be integrally connected to other parts of the connecting portion. The first side is embedded in the groove 113 and is provided with a positioning hole 321; the second side extends in a direction away from the outer surface of the housing 1 provided with the groove 113, and is provided with a connecting hole 322, which is a circular hole, and can be connected to an external detection device by a screw or bolt assembly.

[0046] In this embodiment, the connection portion 31 is in an arc shape, specifically in a semicircular shape, and is fitted on the outer side of the static contact 2, and the connection portion 31 is connected and fixed to the static contact 2, and the connection method can be, for example, welding. The inner side of the through hole 111 is provided with a flange portion 115 in an arc shape, and the flange portion 115 and the connection portion 31 are combined to form an annular body that is sleeved outside the static contact 2. The outer side of the static contact 2 is provided with a circle of annular bosses 21, and the annular body is located on the outer side of the annular boss in the axial direction of the through hole 111, and the connection portion 31 and / or the flange portion 115 are placed on the annular boss 21, such as Figure 6-Figure 13 The inner side surface of the through hole 111 is provided with a circular arc-shaped limiting convex strip 116 corresponding to the connecting portion 31, and the limiting convex strip 116 abuts against the outer side surface of the connecting portion 31, as shown in FIG. Fig.13 As shown, the connecting portion 31 is as close to the fixed contact 2 as possible.

[0047] In this embodiment, the housing 1 specifically includes a first housing 11 and a second housing 12 that match each other up and down, and the lower end of the first housing 11 is snap-connected with the upper end of the second housing 12. The through hole 111 and the groove 113 are arranged on the surface of the first housing 11 away from the second housing 12, that is, the upper surface as shown in the drawings.

[0048] The utility model is a DC relay with a sampling signal pin, which makes the assembly of the sampling signal pin 3 more convenient, can realize automatic assembly, and has stronger versatility. In particular, the sampling signal pin 3 is completely located outside the housing 1, and the sampling signal pin 3 can be assembled after the first housing 11 and the second housing 12 are assembled; the connecting portion 31 of the sampling signal pin 3 is in an arc shape, which can not only reduce the processing accuracy requirements of the connecting portion 31 of the sampling signal pin 3, but also make the matching mode of the connecting portion 31 of the sampling signal pin 3 and the static contact 2 simpler, and easier to realize when using automatic assembly. In addition, when connecting the connecting portion 31 and the static contact 2, since the part of the connecting portion 31 surrounding the static contact 2 is in an arc shape and a non-continuous structure, the shape of the connecting portion 31 can be modified as needed to avoid the connecting portion 31 from warping, so that the connecting portion 31 and the static contact 2 are effectively connected and reliably contacted, thereby improving the connection strength and connection effect between the static contact 2 and the sampling signal pin 3. At the same time, since the connection part 31 does not need to completely surround the stationary contact 2, the size of the connection part 31 can be reduced to save materials and reduce the manufacturing cost. The housing 1 of the utility model realizes multiple limit positions for the sampling signal pin 3, making the sampling signal pin 3 more stable and reliable outside the housing 1.

[0049] The utility model provides a DC relay with a sampling signal pin, and the uninvolved parts are the same as those in the prior art or can be implemented by using the prior art.

[0050] The above embodiments are only used to further illustrate a DC relay with a sampling signal pin of the utility model, but the utility model is not limited to the embodiments. Any simple modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the utility model fall within the protection scope of the technical solution of the utility model.

Claims

1. A DC relay with a sampling signal pin, comprising a housing and a plurality of static contacts, wherein the static contacts are inserted through corresponding through holes of the housing, and a portion of at least one static contact exposed outside the housing is connected to the sampling signal pin; characterized in that: The sampling signal pin is connected to the outer surface of the shell in a limiting manner.

2. The DC relay with sampling signal pin according to claim 1, characterized in that: The sampling signal pin comprises a lead-out portion and a connecting portion for connecting and cooperating with the stationary contact, the lead-out portion and the connecting portion are fixed together; the lead-out portion is at least partially nested and connected with the outer surface of the shell.

3. The DC relay with sampling signal pin according to claim 2, characterized in that: The lead-out portion and the outer surface of the shell are matched with a positioning structure, and the positioning structure includes a positioning hole and a positioning protrusion. The positioning hole is provided in one of the lead-out portion and the outer surface of the shell, and the positioning protrusion is provided in the other of the lead-out portion and the outer surface of the shell. The positioning protrusion is embedded in the positioning hole, and the two are in an interference fit.

4. The DC relay with sampling signal pin according to claim 3, characterized in that: The edges around the rear end of the positioning protrusion are respectively provided with chamfers to facilitate the positioning protrusion to be embedded in the positioning hole; the positioning protrusion is interference fit with the positioning hole in the arrangement direction of the positioning structure and the static contact connected to the sampling signal pin.

5. The DC relay with sampling signal pin according to claim 2, characterized in that: The outer surface of the shell is provided with a groove for at least partially embedding the lead-out portion.

6. The DC relay with sampling signal pin according to claim 3 or 4, characterized in that: The outer surface of the shell is provided with a groove for at least partially embedding the lead-out portion, the positioning protrusion is provided on the shell and is located at the bottom of the groove, and the positioning hole is provided in the lead-out portion.

7. The DC relay with sampling signal pin according to claim 6, characterized in that: The two opposite groove walls of the groove are respectively provided with one or more limiting protrusions, and the limiting protrusions are abutted against the outer side surfaces corresponding to the lead-out parts; the two groove walls are located in the width direction of the groove, and the length direction and positioning structure of the groove are consistent with the arrangement direction of the static contact connected to the sampling signal pin.

8. The DC relay with sampling signal pin according to claim 6, characterized in that: The lead-out portion is L-shaped and includes a first side and a second side. The tail end of the first side is integrally connected to the connecting portion, and the first side is embedded in the groove and is provided with the positioning hole; the second side extends in a direction away from the outer surface of the shell where the groove is provided and is provided with a connecting hole.

9. The DC relay with sampling signal pin according to claim 2, characterized in that: The connecting portion is in an arc shape and is matched with the outer side surface of the stationary contact. The connecting portion is connected and fixed to the stationary contact.

10. The DC relay with sampling signal pin according to claim 9, characterized in that: The inner side surface of the through hole is provided with an arc-shaped flange portion, and the flange portion and the connecting portion are combined to form an annular body sleeved outside the static contact.

11. The DC relay with sampling signal pin according to claim 10, characterized in that: The outer side surface of the stationary contact is provided with a circle of annular bosses, and the connecting portion and / or the flange portion overlaps the annular bosses in the axial direction of the through hole.

12. The DC relay with a sampling signal pin according to claim 9, characterized in that: An arc-shaped limiting convex strip is disposed on the inner side surface of the through hole corresponding to the connecting portion, and the limiting convex strip abuts against the outer side surface of the connecting portion.

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