Connector for CGM sensor

Abstract

The utility model relates to the technical field of connectors, in particular to a connector used for a CGM sensor, an elastic sheet of the connector is fixed in a shell through in-mold forming, on one hand, participation of manual assembly can be reduced, the structure is simple, production cost is reduced, on the other hand, connection strength between the elastic sheet and the shell can be enhanced, and product quality is improved. The arc-shaped part and the bent part are arranged on the fixed section, so that the bonding strength of the elastic piece and the shell in the horizontal direction and the vertical direction can be enhanced respectively, circulation and connection of the two sides of the fixed section are improved through the window when the shell is subjected to injection molding, the production efficiency and quality are improved, and the fixed area of the elastic piece and the shell is greatly increased; therefore, firmness and stability of connection are improved.

Description

Technical Field

[0001] This utility model relates to the field of connector technology, and in particular to a connector for CGM sensors. Background Technology

[0002] As people's living standards improve, they are paying more and more attention to their personal health. As a result, many families are equipped with blood glucose meters. In order to obtain accurate data when conducting blood glucose tests, continuous blood glucose monitoring is generally used. The blood glucose sensor is inserted into the body through a device, and the sensor transmits the data back to the meter.

[0003] Currently, a utility model patent (application number: 202420039334.9) discloses an electronic connector 10, which includes: a plastic housing 1, a insertion groove 13 in the middle of the lower end face of the plastic housing 1, and several mounting holes 12 on both sides of the plastic housing 1. A connecting terminal 2 is provided in each mounting hole 12. Further, the longitudinal sides of the snap-fit ​​portion 23 extend outwards with widened sections 22, and the sides of the mounting holes 12 are respectively provided with slots 15 that mate with the widened sections 22. The widened sections 22 are snapped into the slots 15. The widened sections 22 are provided such that the width of the snap-fit ​​portion 23 is greater than that of the electrical connection portion 21, the bent portion 25, and the elastic abutment portion. The widened sections 22 on both sides of the snap-fit ​​portion 23 snap into the slots 15, thus securing the connecting terminal 2 to the plastic housing 1.

[0004] However, during the production and assembly of the above structure, the applicant found that: the structure of the plastic shell is complex and there are many processing steps. At the same time, the installation of the connecting terminals still requires manual insertion one by one. After the connector is assembled, it is then assembled with the connecting terminal box PCB board, which is time-consuming, labor-intensive, and has low production efficiency. Furthermore, the connecting terminals rely solely on the structure of clamping with slots, resulting in poor firmness and stability. Utility Model Content

[0005] The purpose of this utility model is to provide a connector for CGM sensors. In view of the shortcomings of the existing technology, it aims to solve the technical problems of existing connectors having complex structures, requiring manual intervention to install and fasten multiple terminals to the housing, which is time-consuming, labor-intensive, and has poor firmness and stability.

[0006] To achieve the above objectives, the technical solution adopted by this utility model is as follows: a connector for a CGM sensor, comprising a housing, a cover disposed above the housing, and two rows of spring contacts fixedly connected to the housing by in-mold forming. The housing is provided with a placement cavity for accommodating the sensor and two slots. Each spring contact includes an abutment section and a fixing section connected to the abutment section. The end of the fixing section near the abutment section is provided with an arc-shaped portion extending to the left and right sides. The fixing section is provided with a window and a curved portion connected to the inner wall of the window. The curved portion bends upward and extends above the window. The placement cavity is connected to the slots. The abutment section is accommodated in the placement cavity and abuts against the sensor. The fixing section is accommodated in the housing.

[0007] The present invention is further configured such that the abutting section has a "Z" structure, and the end of the abutting section away from the fixed section is bent inward.

[0008] The present invention is further configured such that: the spring sheet also includes a welding section connected to the fixing section and extending out of the housing, and a circuit board is snapped into the lower part of the housing, and the welding section is welded to the circuit board.

[0009] The present invention is further configured such that at least one notch is provided at the end of the welded section.

[0010] The present invention is further configured such that: the circuit board is provided with positioning holes, and the bottom surface of the housing is provided with protrusions that match the positioning holes, so that the protrusions fit precisely into the positioning holes when the housing and the circuit board are assembled.

[0011] The present invention is further configured such that: the bottom surface of the housing is provided with a plurality of clearance grooves on the side edges, and the clearance grooves are provided on both sides of the welding section.

[0012] The present invention is further configured such that: a number of spring pieces are staggered to divide the placement cavity into several cavities, and a number of positioning posts for clamping the sensor are staggered and fixedly connected to the lower surface of the cover. When the cover and the housing are assembled, the positioning posts are inserted into the cavity.

[0013] The present invention is further configured such that the positioning post and the cover are integrally formed, and the number of positioning posts and spring pieces are the same.

[0014] The present invention is further provided with a chamfered structure at the bottom end of the positioning column.

[0015] The present invention is further configured such that: the slot opening faces upward and is symmetrically distributed on the opposite side of the placement cavity, and the top surface opening of the slot is provided with a chamfer structure.

[0016] Compared with the prior art, the beneficial effects of this application are as follows: The spring sheet of this utility model is fixed inside the shell by in-mold molding. On the one hand, it can reduce the participation of manual assembly, simplify the structure, and reduce production costs. On the other hand, it can enhance the connection strength between the spring sheet and the shell. Furthermore, the arc-shaped part and the curved part set in the fixed section can enhance the bonding strength between the spring sheet and the shell in the horizontal and vertical directions, respectively. Moreover, the window during the injection molding of the shell improves the flow and connection on both sides of the fixed section, improves production efficiency and quality, and greatly increases the fixing area between the spring sheet and the shell, thereby improving the firmness and stability of the connection. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of this application, 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 some embodiments of this application. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0018] Figure 1 This is a schematic diagram of the structure of this utility model from one perspective;

[0019] Figure 2 This is a structural schematic diagram from another perspective of the present invention;

[0020] Figure 3 This is a perspective view of the shell and spring contact structure in this utility model;

[0021] Figure 4 This is another perspective view of the shell and spring contact structure in this utility model;

[0022] Figure 5 This is a schematic diagram of the structure of the spring clip in this utility model;

[0023] Figure 6 This is a schematic diagram of the circuit board structure in this utility model.

[0024] The details of the reference numerals used in the above figures are as follows:

[0025] 1-Housing shell, 11-Placement cavity, 12-Slot, 13-Protrusion, 14-Relief groove;

[0026] 2-Cover, 21-Positioning pin;

[0027] 3-Spring, 31-Abutting section, 32-Fixing section, 321-Curved part, 322-Window, 323-Bent part, 33-Welding section, 331-Notch;

[0028] 4-Circuit board, 41-Positioning hole, 42-Mounting hole, 43-Soldering area;

[0029] 5-Sensors. Detailed Implementation

[0030] In the description of this application, the term "several" refers to two or more (including two). The terms "installed," "connected," and "linked" should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; "linked" can be a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0031] In the description of this application, the technical terms "upper", "lower", "front", "rear", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the embodiments of this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the embodiments of this application.

[0032] In order to better understand the above-mentioned objectives, technical solutions and advantages of this application, the technical solutions of this application will be clearly and completely described below with reference to the accompanying drawings, and to understand in detail how to solve the problems raised in the background art.

[0033] like Figures 1 to 6 As shown, a connector for a CGM sensor includes a housing 1, a cover 2 disposed above the housing 1, and two rows of spring contacts 3 fixedly connected to the housing 1 by in-mold forming. The housing 1 is provided with a placement cavity 11 for accommodating a sensor 5 and two slots 12. The spring contacts 3 include an abutment section 31 and a fixing section 32 connected to the abutment section 31. The end of the fixing section 32 near the abutment section 31 is provided with an arc-shaped portion 321 extending to the left and right sides. The fixing section 32 is provided with a window 322 and a curved portion 323 connected to the inner wall of the window 322. The curved portion 323 bends upward and extends above the window 322. The placement cavity 11 is connected to the slots 12. The abutment section 31 is accommodated in the placement cavity 11 and abuts against the sensor 5. The fixing section 32 is accommodated in the housing 1.

[0034] With the above solution, when the connector of the present utility model is actually applied: First, a plurality of elastic pieces 3 are formed by stamping conductive metal, and then a plurality of elastic pieces 3 are fixed inside the housing 1 by in-mold forming, so that the housing 1 and the elastic pieces 3 are of an integral structure. On the one hand, it can reduce the manual assembly of the elastic pieces 3, with a simple structure, omitting various clamping or fastening structure designs and processing for the elastic pieces 3, reducing production costs. On the other hand, it can enhance the connection strength between the elastic pieces 3 and the housing 1. Then, through the arc portion 321 and the bending portion 323 provided on the fixed section 32 of the elastic piece 3, the bonding strength and wrapping property between the elastic piece 3 and the housing 1 in the horizontal and vertical directions can be enhanced respectively. For example, the arc portion 321 extends outward toward the left and right sides, and the bending portion 323 extends upward. Compared with the straight rectangular fixed section 32 in the prior art, the left-right and up-down bonding areas between the elastic piece 3 and the housing 1 are increased. And when the housing 1 is injection molded, the window 322 can improve the circulation and connection on both sides of the elastic piece 3. At this time, the window 322 can be used as a flow channel, enabling the molten plastic on both sides of the fixed section 32 to flow quickly and connect to form a connecting column, improving production efficiency and quality, and greatly increasing the fixing area between the elastic piece 3 and the housing 1, thereby improving the firmness and stability of the connection.

[0035] In this embodiment, the housing 1 and the machine cover 2 are matched and both are plastic parts. The machine cover 2 can cover the upper part of the housing 1. The number of elastic pieces 3 is 3. One elastic piece 3 and two elastic pieces 3 can be arranged opposite and staggered to form two rows in a "pin" shape, that is, one elastic piece 3 corresponds to the center points of the two elastic pieces 3. Of course, in some embodiments, the number of elastic pieces 3 can also be 4. For example, 4 elastic pieces 3 are arranged in two rows in a pairwise side-by-side and staggered manner, and the positioning columns 21 are correspondingly arranged in 4; the placement cavity 11 is a rectangular through hole and penetrates the entire housing 1 up and down. The slots 12 are opened on the side walls of the housing 1 on both sides of the placement cavity 11. The two slots 12 are arranged in the same straight line, and the structure of the slots 12 is matched with the sensor 5; the arc portion 321 is one of a semicircle, a hook shape or an arc shape, the window 322 is one of a circle, a rectangle or a trapezoid, the bending portion 323 and the fixed section 32 are of an integral molding structure, and the bending portion 323 is composed of a connected rising section and a horizontal section. Rounding structures are provided at the connections of the fixed section 32, the rising section and the horizontal section in sequence to ensure the structural strength. The horizontal section and the fixed section 32 are arranged parallel or at an acute angle; the sensor 5 is of a "T" shape, and 3 connection areas corresponding to the elastic pieces 3 are provided on both side surfaces of the sensor 5, and the abutting section 31 contacts with this connection area.

[0036] Such as Figure 2 and Figure 3As shown, in one specific embodiment of the improvement, the abutment section 31 has a "Z" structure, and the end of the abutment section 31 away from the fixing section 32 is bent inward. Specifically, the end of the abutment section 31 is bent inward in the direction away from the sensor 5, which facilitates the quick installation and removal of the sensor 5. When the sensor 5 is inserted into the placement cavity 11 and the slot 12, the abutment section 31 can abut against the connection area of ​​the sensor 5, ensuring the connection and stability between the sensor 5 and the spring piece 3, strengthening the clamping and fixing of the left and right sides of the sensor 5, and preventing the sensor 5 from shifting or falling off. When the sensor 5 needs to be replaced, it can be simply pulled out, which is beneficial for later maintenance.

[0037] like Figure 1 and Figure 5 As shown, in one specific embodiment of the improvement, the spring 3 further includes a welding section 33 connected to the fixing section 32 and extending out of the housing 1. A circuit board 4 is snapped onto the lower part of the housing 1, and the welding section 33 is welded to the circuit board 4. Specifically, the circuit board 4 has a U-shaped mounting hole 42, and a welding area 43 corresponding to the welding section 33 is provided on the opposite side of the mounting hole 42 (see...). Figure 6 The area of ​​the welding area 43 is larger than the area of ​​the bottom surface of the welding section 33. In actual assembly, the bottom surface of the housing 1 has a snap-fit ​​structure. For example, the two symmetrical edges of the bottom surface are set into an L-shaped groove structure, so that the rectangular protrusion formed on the bottom surface of the housing 1 can be embedded in the mounting hole 42 and placed on the surface of the circuit board 4. This can form a support and snap-fit ​​structure to ensure the accuracy of the installation of the circuit board 4 and the housing 1. Finally, the welding section 33 and the circuit board 4 are fixed by welding, thereby ensuring the electrical connection between the spring 3 and the circuit board 4. It also provides a limiting fixation for the snap-fit ​​between the housing 1 and the circuit board 4 to prevent the housing 1 from shifting on the circuit board 4.

[0038] like Figure 1 and Figure 5 As shown, in one specific embodiment of the improvement, the end of the welding section 33 is provided with at least one notch 331. Specifically, in this embodiment, the notch 331 is provided and is located at the center of the side of the welding section 33 away from the fixing section 32. The notch 331 is one of U-shaped, rectangular, trapezoidal or arc-shaped. In this embodiment, a U-shaped notch 331 is preferred. When using surface mount technology for welding, it can increase the amount of solder applied to fix the spring 3, thereby improving the welding strength.

[0039] like Figures 2 to 4 and Figure 6As shown, in one specific embodiment of the improvement, the circuit board 4 is provided with positioning holes 41, and the bottom surface of the housing 1 is provided with protrusions 13 that match the positioning holes 41. When the housing 1 and the circuit board 4 are assembled, the protrusions 13 are precisely embedded in the positioning holes 41. Specifically, there are two positioning holes 41 symmetrically distributed on both sides of the front end of the aforementioned mounting holes 42. There are two protrusions 13 symmetrically distributed on the two symmetrical angles of the rectangular protrusions on the bottom surface of the housing 1. The protrusions 13 extend downward and are coplanar with the bottom surface of the housing 1. Both the positioning holes 41 and the protrusions 13 are U-shaped structures. The positioning holes 41 are connected to the aforementioned mounting holes 42. The bottom surface of the protrusions 13 is coplanar with the bottom surface of the circuit board 4. Therefore, when the housing 1 and the circuit board 4 are assembled, the protrusions 13 are precisely embedded in the positioning holes 41. On the one hand, this further improves the accuracy of the engagement between the housing 1 and the circuit board 4, preventing the housing 1 from shifting left and right on the circuit board 4. On the other hand, it facilitates the positioning and welding of the spring 3 and the circuit board 4, improving the welding quality and efficiency.

[0040] like Figure 1 and Figure 4 As shown, in one specific embodiment of the improvement, the bottom surface of the housing 1 has several clearance grooves 14 on its side edges, and the clearance grooves 14 are located on both sides of the welding section 33. Specifically, the clearance grooves 14 can be formed by setting several downwardly extending bosses on the surface of the two symmetrical L-shaped grooves on the bottom surface of the housing 1. The number of bosses is the same as the number of spring pieces 3, and they wrap around part of the fixing section 32, so that part of the bottom surface of the fixing section 32 is coplanar with the bottom surface of the bosses. The welding section 33 extends outward from the side of the bosses, and part of the bottom surface of the fixing section 32 participates in the actual welding. This ensures the housing 1's wrapping of the spring pieces 3, while also increasing the welding area of ​​the spring pieces 3, strengthening the stability and firmness of the welding between the spring pieces 3 and the circuit board 4. The clearance grooves 14 enable the welding section 33 and part of the fixing section 32 to wrap around the spring pieces 3. During soldering, the excess liquid solder paste squeezed out by the fixed section 32 can enter the relief groove 14. Furthermore, since the area of ​​the soldering area 43 is larger than that of the soldering section 33, it can prevent the bottom surface of the housing 1 from being directly pressed into the soldering area 43, thus avoiding the product from floating when the solder paste cools and forms a solid connection. It is worth noting that the window 322 is set close to the abutment section 31 within the fixed section 32. The part of the fixed section 32 that participates in soldering is the rear section close to the soldering section 33, so that the design of the window 322 avoids the part of the fixed section 32 that participates in soldering, thus avoiding interference with the flow function of the window 322.

[0041] like Figures 2 to 4As shown, as a specific implementation of the improvement, a plurality of elastic pieces 3 are staggered to divide the placement cavity 11 into several cavities. A plurality of positioning columns 21 for clamping the sensor 5 are fixedly connected in an alternating manner on the lower surface of the machine cover 2. When the machine cover 2 and the housing 1 are assembled, the positioning columns 21 are exactly inserted into the cavities. Specifically, there are 3 cavities and positioning columns 21 formed. The structures of the cavities and the positioning columns 21 match each other, which can utilize the internal space of the housing 1, reduce the size of the product, and make the structure compact. During actual assembly, the sensor 5 can first be placed between the positioning columns 21 for clamping, or directly installed and clamped in the placement cavity 11 and the slot 12. Then, the machine cover 2 is covered above the housing 1. At this time, the positioning columns 21 are accurately inserted into the cavities. On the one hand, the positioning columns 21 can limit the elastic pieces 3 in the cavities, and on the other hand, they can also limit and fix the sensor 5, and cooperate with the two rows of elastic pieces 3 to clamp the sensor 5, achieving the accuracy of connection and the assembly efficiency.

[0042] As Figure 2 shown, as a specific implementation of the improvement, the positioning column 21 and the machine cover 2 are of an integrally formed structure, and the number of the positioning columns 21 is the same as that of the elastic pieces 3. Specifically, the positioning columns 21 are arranged on the bottom surface of the machine cover 2, and the three positioning columns 21 also form a two-row structure in a "pin" shape, which can ensure that the positioning columns 21 are inserted into the cavities, improving the convenience and accuracy of assembly; the positioning columns 21 and the machine cover 2 are of an integral structure, which can enhance the structural strength. When the machine cover 2 is covered above the housing 1, it can improve the sealing performance and anti-collision or anti-vibration ability of the whole product.

[0043] As Figure 2 shown, as a specific implementation of the improvement, a chamfered structure is provided at the end of the bottom surface of the positioning column 21. Specifically, the chamfered structure forms an inclined surface at the four peripheral edges of the end of the bottom surface of the positioning column 21. When the machine cover 2 and the housing 1 are assembled, when a sensor 5 has been inserted into the placement cavity 11 and the slot 12, the inclined surface can guide the positioning column 21 to enter accurately. In another case, when the sensor 5 is first fixed between the positioning columns 21, the inclined surface can guide the sensor 5 to enter quickly and accurately, both of which can reduce the resistance and friction during the assembly process.

[0044] As Figure 3As shown, in one specific embodiment of the improvement, the slots 12 have upward openings and are symmetrically distributed on the opposite side of the placement cavity 11, and the top opening of the slots 12 has a chamfered structure. Specifically, the slots 12 allow the sensor 5 to be precisely inserted into a predetermined position. For example, the installation height of the sensor 5 can be changed by adjusting the depth of the slots 12, ensuring correct alignment between the sensor 5 and the internal structure of the connector, with high precision and tightness. Furthermore, by cooperating with the placement cavity 11, the middle part of the "T"-shaped sensor 5 sinks into the placement cavity 11, and the two protruding parts can be accommodated in the slots 12, further ensuring that the sensor 5 is not easily loosened or dislodged during operation, thereby ensuring the stability of the connection. Therefore, the chamfered structure of the slots 12 can, on the one hand, help guide the sensor 5 to enter accurately, and on the other hand, reduce the resistance or friction encountered by the sensor 5 when inserting into the slots 12, making the assembly process smoother and improving the accuracy and efficiency of assembly.

[0045] Finally, it should be noted that the above description is only a preferred embodiment of this utility model, and the protection scope of this utility model is not limited to the above embodiments. All technical solutions within the scope of this utility model's concept are within the protection scope of this utility model. It should be pointed out that for those skilled in the art, any improvements and modifications made without departing from the principle of this utility model should also be considered within the protection scope of this utility model.

Claims

1. A connector for a CGM sensor, characterized in that, The device includes a housing, a cover disposed above the housing, and two rows of spring tabs fixedly connected to the housing by in-mold forming. The housing has a placement cavity for accommodating a sensor and two slots. Each spring tab includes an abutment section and a fixing section connected to the abutment section. The fixing section has an arc-shaped portion extending to the left and right sides at its end near the abutment section. The fixing section has a window and a curved portion connected to the inner wall of the window. The curved portion bends upward and extends above the window. The placement cavity communicates with the slots. The abutment section is accommodated in the placement cavity and abuts against the sensor. The fixing section is accommodated in the housing.

2. The connector for a CGM sensor of claim 1, wherein, The abutting section has a "Z" structure, and the end of the abutting section away from the fixed section is bent inward.

3. The connector for a CGM sensor of claim 1, wherein, The spring also includes a welding section that is connected to the fixing section and extends out of the housing. A circuit board is snapped into the lower part of the housing, and the welding section is welded to the circuit board.

4. The connector for a CGM sensor of claim 3, wherein, The end of the welded section is provided with at least one notch.

5. The connector for a CGM sensor of claim 3, wherein, The circuit board is provided with positioning holes, and the bottom surface of the housing is provided with protrusions that match the positioning holes. When the housing and the circuit board are assembled, the protrusions fit precisely into the positioning holes.

6. A connector for a CGM sensor according to claim 5, wherein, The bottom surface of the housing is provided with a plurality of clearance grooves on its side edges, and the clearance grooves are provided on both sides of the welded section.

7. The connector for a CGM sensor of claim 1, wherein, Several spring clips are staggered to divide the placement cavity into several cavities. Several positioning posts for clamping the sensor are staggered and fixedly connected to the lower surface of the cover. When the cover and the housing are assembled, the positioning posts are inserted into the cavities.

8. The connector for a CGM sensor of claim 7, wherein, The positioning post and the cover are integrally formed, and the number of positioning posts is the same as the number of spring pieces.

9. The connector for a CGM sensor of claim 8, wherein, The bottom end of the positioning post is provided with a chamfered structure.

10. The connector for a CGM sensor of claim 1, wherein, The slots have upward-facing openings and are symmetrically distributed on the opposite side of the placement cavity, and the top opening of the slots has a chamfered structure.

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