Hall chip press-fitting structure

Abstract

The utility model relates to a Hall chip press-fitting structure. The device comprises a bottom die used for placing a current sensor; the current sensor comprises a shell and a Hall chip, the Hall chip comprises a chip body and a row of bent pins extending to the chip body, and each pin comprises a vertical part vertically extending to the chip body and a bent part vertically extending to the vertical part. The housing is provided with a notch for the Hall chip to insert and an accommodating groove for accommodating the bending parts of the pins. And the pressing die is movably arranged above the bottom die, and the pressing die comprises guide grooves arranged corresponding to the bending parts in the pins, pin pressing blocks for correspondingly pressing the bending parts into the accommodating grooves, and body pressing blocks for pressing the chip body into the notches. According to the utility model, the pin can be accurately guided and pressed into the accommodating groove of the shell, and the assembly precision and quality are obviously improved.

Description

Technical Field

[0001] The utility model relates to the technical field of sensor assembly, in particular to a press-fitting structure for a Hall chip. Background Art

[0002] Hall current sensors adopt the Hall effect principle and have the advantages of small package size, wide measurement range, light weight, low power consumption, etc. They are widely used for alternating or direct current detection in industrial, commercial and communication systems. Its main components include a low-temperature-drift linear Hall chip, a magnetic core, and a current conductor path with a built-in low insertion resistance. When an external current passes through this low-resistance current conductor path, a magnetic field will be generated, and the Hall chip will convert it into a voltage signal output proportional to the input current. Through the internal magnetic core, the interference of external common-mode magnetic fields on the product can be effectively suppressed, thereby improving the accuracy in a magnetic noise environment.

[0003] During the manufacturing process of Hall sensors, the Hall chip must be press-fitted into the housing for fixation, while ensuring that the pins of the Hall chip correctly enter the position of the accommodation groove on the housing. However, the traditional assembly method has the following problems: the pins of the Hall chip are difficult to align with the accommodation groove on the housing during press-fitting and are prone to deformation due to external force contact, which has an adverse impact on the product quality. Summary of the Invention

[0004] Therefore, the technical problem to be solved by the utility model is to overcome the problems that the Hall chip is difficult to align with the accommodation groove on the housing and is prone to deformation due to external force contact during press-fitting in the prior art.

[0005] To solve the above technical problems, the utility model provides a press-fitting structure for a Hall chip, including:

[0006] A bottom mold for placing a current sensor; wherein, the current sensor includes a housing and a Hall chip, the Hall chip includes a chip body and a row of multiple pins extending from the chip body and being bent, the pins include a vertical portion vertically extending from the chip body and a bent portion vertically extending from the vertical portion, and the housing is provided with a notch for inserting the Hall chip and an accommodation groove for accommodating the bent portions of the pins;

[0007] A press mold movably arranged above the bottom mold, the press mold includes a guiding groove corresponding to the bent portion in each of the pins, a pin pressing block for pressing the bent portion into the accommodation groove, and a body pressing block for pressing the chip body into the notch;

[0008] Among them, the pin pressing block includes convex teeth integrally formed on the pressing die and corresponding to the accommodating groove. When each convex tooth contacts the corresponding bending part, the body pressing block contacts the chip body; the guiding groove can guide the bending part to be in the same plane as the corresponding convex tooth during the pressing process, and the convex tooth can enter the accommodating groove.

[0009] In an embodiment of the present utility model, an elastic guiding component is further included. The elastic guiding component is arranged between the pressing die and the bottom die to provide an elastic force for the two to move away from each other.

[0010] In an embodiment of the present utility model, the elastic guiding component includes guiding columns connected to the bottom die, connecting sleeves and springs respectively sleeved on the guiding columns. The pressing die is provided with guiding holes for the guiding columns to slide, and the springs are arranged between the connecting sleeves and the guiding holes.

[0011] In an embodiment of the present utility model, two elastic guiding components are symmetrically arranged along the bottom die. The pressing die includes two pressing arms extending from both ends thereof, and each pressing arm is provided with the guiding holes.

[0012] In an embodiment of the present utility model, the bottom die is provided with a positioning groove for positioning and placing the housing of the current sensor.

[0013] In an embodiment of the present utility model, a guiding block is installed on the pressing die. The guiding block is provided with a row of guiding teeth, and the guiding grooves are formed between adjacent two guiding teeth.

[0014] In an embodiment of the present utility model, the convex teeth are strip-shaped, and the widths of the convex teeth are respectively smaller than the width of the pin and the gap of the accommodating groove. When pressed in place, the convex teeth can make the bending part abut against the bottom wall of the corresponding accommodating groove.

[0015] In an embodiment of the present utility model, the body pressing block is provided with a flat pressing step. The surface of the body pressing block facing away from the pressing step is parallel to and close to the vertical part. When pressed in place, the pressing step abuts against the upper side end of the notch.

[0016] In an embodiment of the present utility model, there are four pins. The bending parts of adjacent two pins are distributed at different horizontal heights, and the bending parts of two pins arranged at intervals are located at the same horizontal position; correspondingly, adjacent two accommodating grooves are distributed at different horizontal heights, and two accommodating grooves arranged at intervals are located at the same horizontal position.

[0017] In an embodiment of the present utility model, the bottom ends of the convex teeth are flat and the two side surfaces are provided with transition arc surfaces.

[0018] The above technical solution of the present utility model has the following advantages compared with the prior art:

[0019] For the press-fitting structure of a Hall chip of the present utility model, the pin pressing block and the body pressing block in the press mold ensure the correct fit of the pins and the chip body with the housing, reducing the risk of pin deformation or damage during the assembly process. The guiding groove prevents the pins from being misaligned during the press-fitting process, enabling the bent portion of the pins to be correctly positioned in the accommodating groove during the press-fitting process, and being able to accurately guide and press-fit the pins into the accommodating groove of the housing, significantly improving the assembly accuracy and quality. Description of the Drawings

[0020] In order to make the content of the present utility model easier to be clearly understood, the following further details the present utility model according to the specific embodiments of the present utility model in conjunction with the drawings.

[0021] Figure 1 It is a schematic diagram of the overall structure of the press-fitting mechanism of the Hall chip of the present utility model.

[0022] Figure 2 It is a schematic diagram of a partial structure of the press-fitting mechanism of the Hall chip of the present utility model.

[0023] Figure 3 It is a schematic diagram of the press mold structure of the present utility model.

[0024] Figure 4 It is a schematic diagram of the current sensor structure of the present utility model.

[0025] Figure 5 It is a schematic diagram of the Hall chip structure of the present utility model.

[0026] Figure 6 It is a schematic diagram of the housing structure of the present utility model.

[0027] Figure 7 It is a schematic diagram of the press-fitting of the present utility model.

[0028] Explanation of the reference numerals in the drawings of the specification:

[0029] 100, current sensor; 110, housing; 111, notch; 112, accommodating groove; 120, Hall chip; 121, chip body; 122, pins; 122a, vertical portion; 122b, bent portion;

[0030] 200, base;

[0031] 1, bottom mold; 11, limit post; 12, positioning groove;

[0032] 2. Die; 21. Guide block; 211. Guide groove; 212. Guide tooth; 22. Pin pressing block; 221. Convex tooth; 23. Body pressing block; 231. Pressing step; 24. Pressing arm

[0033] 3. Elastic guiding component; 31. Guide post; 32. Connecting sleeve; 33. Spring Detailed implementation manner

[0034] The following further describes the present utility model in conjunction with the accompanying drawings and specific embodiments, so that those skilled in the art can better understand the present utility model and be able to implement it, but the specific embodiments cited do not limit the present utility model

[0035] In the present utility model, when directions (up, down, left, right, front, and back) are described, it is only for the convenience of describing the technical solution of the present utility model, rather than indicating or implying that the technical features referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation to the present utility model

[0036] In the present utility model, the meaning of "several" is one or more, the meaning of "multiple" is two or more, and "greater than", "less than", "exceeding", etc. are understood not to include the present number; "above", "below", "within", etc. are understood to include the present number. In the description of the present utility model, if "first" and "second" are described, they are only for the purpose of distinguishing technical features, and cannot be understood as indicating or implying relative importance or implicitly indicating the quantity of the indicated technical features or implicitly indicating the sequence relationship of the indicated technical features

[0037] In the present utility model, unless otherwise clearly defined, words such as "set", "installed", "connected", etc. should be understood in a broad sense. For example, they can be directly connected, or indirectly connected through an intermediate medium; they can be fixedly connected, or detachably connected, or integrally formed; they can be mechanically connected, or electrically connected or capable of communicating with each other; they can be the communication inside two components or the interaction relationship between two components. Those skilled in the art can reasonably determine the specific meaning of the above words in the present utility model in combination with the specific content of the technical solution

[0038] Refer to Figures 1-6 As shown, a pressing mechanism for a Hall chip 120 of the present utility model includes:

[0039] The bottom die 1 disposed on the base 200 is used to place the current sensor 100. Among them, the current sensor 100 includes a housing 110 and a Hall chip 120. The Hall chip 120 includes a chip body 121 and a row of multiple pins 122 extending from the chip body 121 and being bent. The pins 122 include a vertical portion 122a vertically extending from the chip body 121 and a bent portion 122b vertically extending from the vertical portion 122a. The housing 110 is provided with a notch 111 for inserting the Hall chip 120 and a receiving groove 112 for receiving (and clamping) the bent portions 122b of the pins 122.

[0040] The pressing die 2 is movably disposed above the bottom die 1. The pressing die 2 includes a guiding groove 211 corresponding to the bent portion 122b in each of the pins 122, a pin pressing block 22 for pressing the bent portion 122b into the receiving groove 112 correspondingly, and a body pressing block 23 for pressing the chip body 121 into the notch 111.

[0041] The settings of the pin pressing block 22, the body pressing block 23 and the guiding groove 211 reduce the risk of deformation or damage of the pins 122 during the assembly process, and ensure the stability of the position of the Hall chip 120 during the pressing-down process, prevent misalignment, ensure that the pins 122 do not deviate from the predetermined trajectory during the pressing process, and ensure that the functionality of the Hall chip 120 is not affected.

[0042] If the body pressing block 23 is set separately, deformation may occur during the process of the bent portion 122b being clamped into the receiving groove 112. Referring to Figure 7 As shown, while each of the convex teeth 221 contacts the corresponding bent portion 122b, the pressing step 231 contacts the chip body 121 to ensure that the angle between the vertical portion 122a and the bent portion 122b remains unchanged during the pressing process.

[0043] To improve the stability of the pressing process and ensure the accurate positioning when the pressing die 2 returns, an elastic guiding component 3 is further provided. The elastic guiding component 3 is disposed between the pressing die 2 and the bottom die 1 to provide an elastic force for the two to move away from each other, provide a buffering effect between the pressing die 2 and the bottom die 1, make the pin pressing block and the body pressing block have a certain flexibility, protect the precise cooperation during the pressing process, and at the same time make the mechanism reposition quickly and accurately.

[0044] In one embodiment, referring to Figure 2As shown, the elastic guiding assembly 3 includes a guiding column 31 connected to the bottom die 1, a connecting sleeve 32 and a spring 33 sleeved on the guiding column 31 respectively. The pressing die 2 is provided with a guiding hole for the guiding column 31 to slide. The spring 33 is arranged between the connecting sleeve 32 and the guiding hole. A limiting column 11 slidably connected to the pressing die 2 is further arranged on the bottom die 1.

[0045] In one embodiment, two elastic guiding assemblies 3 are symmetrically arranged along the bottom die 1. The pressing die 2 includes two pressing arms 24 extending from both ends of it, and each pressing arm 24 is provided with the guiding hole.

[0046] In one embodiment, referring to Figure 2 As shown, the bottom die 1 is provided with a positioning groove 12 for positioning and placing the housing of the current sensor 100.

[0047] In one embodiment, referring to Figure 2 As shown, a guiding block 21 is installed on the pressing die 2. The guiding block 21 is provided with a row of guiding teeth 212, and a guiding groove 211 is formed between two adjacent guiding teeth 212.

[0048] In one embodiment, referring to Figure 3 As shown, the pin pressing block 22 includes a convex tooth 221 integrally formed on the pressing die 2 and corresponding to the accommodating groove 112. The guiding groove 211 can guide the bending part 122b to be in the same plane as the corresponding convex tooth 221 during the press-fitting process. When pressed in place, the convex tooth 221 can make the bending part 122b abut against the bottom wall of the corresponding accommodating groove 112. The convex tooth 221 is strip-shaped, with a width smaller than the width of the pin 122 and smaller than the gap of the accommodating groove 112, so that it can smoothly enter the accommodating groove 112 when pressed down and clamp the pin 122 into the accommodating groove 112. Each convex tooth 221 is connected and in the same straight line as the corresponding guiding groove 211.

[0049] Through the above settings, the guiding teeth 212 and the guiding groove 211 provide accurate guidance for the pins. The guiding groove prevents the pins from being misaligned during the press-fitting process, avoiding the problem that the pins 122 may be deformed or damaged during the press-fitting process. The convex tooth 221 cooperating with the accommodating groove 112 can accurately press-fit the bending part 122b, realizing the precise fixation of the pins 122 of the Hall chip 120.

[0050] In one embodiment, referring to Figure 2As shown, an adjustment rod is connected between the guiding block 32 and the body pressing block 23. The guiding block 32 is embedded in the pressing die 2, and the body pressing block 23 is installed at the side end of the pressing die 2. The relative distance between the guiding block 32 and the body pressing block 23 can be adjusted through the adjustment rod to adapt to bending parts 122b of different lengths.

[0051] In one embodiment, referring to Figure 2 As shown, the body pressing block 23 is provided with a flat pressing step 231. The side of the body pressing block 23 facing away from the pressing step 231 is parallel to and close to the vertical part 122a, and can contact and guide the vertical part 122a during the downward pressing process to prevent it from being misaligned. When the downward pressing is in place, the pressing step 231 abuts against the upper side end of the notch 111.

[0052] In one embodiment, referring to Figure 5 As shown, there are four pins 122. The bending parts 122b of two adjacent pins 122 are distributed at different horizontal heights, and the bending parts 122b of two spaced-apart pins 122 are located at the same horizontal position; correspondingly, two adjacent receiving grooves 112 are distributed at different horizontal heights, and two spaced-apart receiving grooves 112 are located at the same horizontal position. It can be understood that the height of each convex tooth 221 corresponds to the height of the bending part 122b one by one.

[0053] In one embodiment, referring to Figure 7 As shown, the bottom end of each convex tooth 221 is a plane and the two side surfaces are provided with transition arc surfaces to prevent damage to the pins. The bottom end of the guiding groove 211 is open to form two guiding inclined surfaces that expand downward, which facilitates the bending part 122b to enter the guiding groove 211.

[0054] The operator places the housing 110 of the current sensor 100 in the positioning groove 12 of the bottom die 1, and places the Hall chip 120 at the position of the notch 111 of the housing 110; the pressing die 2 starts to move downward under the action of the power device. The pins 122 of the Hall chip 120 first enter the guiding groove 211, and then the pin pressing block 22 and the body pressing block 23 respectively contact the bending part 122b and the chip body 121 of the Hall chip 120 at the same time. When the downward pressing is in place, the pressing step 231 abuts against the upper side end of the notch 111. At this time, the chip body 121 enters the notch 111 of the housing 110 and the pins abut against the bottom wall of the receiving groove 112 of the housing 110. After the pressing is completed, the power device rises, and the elastic guiding assembly 3 causes the pressing die 2 to rise and reset.

[0055] Finally, it should be noted that the above specific embodiments are only used to illustrate the technical solutions of the present utility model and not to limit them. Although the present utility model has been described in detail with reference to the examples, those of ordinary skill in the art should understand that the technical solutions of the present utility model can be modified or equivalently replaced without departing from the spirit and scope of the technical solutions of the present utility model, and they should all be covered within the scope of the claims of the present utility model.

Claims

1. A Hall chip press-fit structure, characterized in that: include: A bottom mold (1) for placing a current sensor (100); wherein the current sensor (100) comprises a housing (110) and a Hall chip (120); the Hall chip (120) comprises a chip body (121) and a row of a plurality of pins (122) extending from the chip body (121) and being bent; the pins (122) comprise a vertical portion (122a) extending perpendicularly to the chip body (121) and a bent portion (122b) extending perpendicularly to the vertical portion (122a); the housing (110) is provided with a notch (111) for inserting the Hall chip (120) and a receiving groove (112) for receiving the bent portion (122b) of each pin (122); A pressing die (2) is movably arranged above the bottom die (1), the pressing die (2) comprising a guide groove (211) arranged corresponding to the bent portion (122b) in each of the pins (122), a pin pressing block (22) for pressing the bent portion (122b) into the receiving groove (112), and a body pressing block (23) for pressing the chip body (121) into the notch (111); The pin pressing block (22) comprises a protruding tooth (221) integrally formed with the pressing die (2) and arranged corresponding to the receiving groove (112), and each protruding tooth (221) is in contact with the corresponding bending portion (122b), while the body pressing block (23) is in contact with the chip body (121); The guide groove (211) can guide the bent portion (122b) to be in the same plane as the corresponding convex tooth (221) during the press-fitting process, and the convex tooth (221) can enter the accommodating groove (112).

2. A Hall chip press-fit structure according to claim 1, characterized in that: It also comprises an elastic guide component (3), wherein the elastic guide component (3) is arranged between the pressing die (2) and the bottom die (1) to provide an elastic force to move the two away from each other.

3. A Hall chip press-fit structure according to claim 2, characterized in that: The elastic guide assembly (3) comprises a guide column (31) connected to the bottom mold (1), and a connecting sleeve (32) and a spring (33) respectively sleeved on the guide column (31); the pressing mold (2) is provided with a guide hole for the guide column (31) to slide; and the spring (33) is arranged between the connecting sleeve (32) and the guide hole.

4. A Hall chip press-fit structure according to claim 3, characterized in that: Two of the elastic guide components (3) are symmetrically arranged along the bottom mold (1), and the pressing mold (2) includes two pressing arms (24) extending from both side ends thereof, and each of the pressing arms (24) is provided with the guide hole.

5. The Hall chip press-fit structure according to claim 1, characterized in that: The bottom mold (1) is provided with a positioning groove (12) for positioning a housing of the current sensor (100).

6. A Hall chip press-fit structure according to claim 1, characterized in that: The die (2) is provided with a guide block (21), the guide block (21) being provided with a row of guide teeth (212), and the guide groove (211) being formed between two adjacent guide teeth (212).

7. The Hall chip press-fit structure according to claim 1, characterized in that: When pressed down into place, the convex tooth (221) is in the shape of an elongated strip, and the width of the convex tooth (221) is respectively smaller than the width of the pin (122) and the gap of the accommodating groove (112). When pressed down into place, the convex tooth (221) can cause the bent portion (122b) to abut against the corresponding bottom wall of the accommodating groove (112).

8. A Hall chip press-fit structure according to claim 7, characterized in that: The main body pressing block (23) is provided with a flat pressing step (231); a side of the main body pressing block (23) facing away from the pressing step (231) is close to and parallel to the vertical portion (122a); when pressed down into place, the pressing step (231) abuts against the upper side end of the notch (111).

9. A Hall chip press-fit structure according to claim 8, characterized in that: Four pins (122) are provided, the bent portions (122b) of two adjacent pins (122) are horizontally distributed in height, and the bent portions (122b) of two spaced-apart pins (122) are located at the same horizontal position; correspondingly, two adjacent accommodating grooves (112) are horizontally distributed in height, and the two spaced-apart accommodating grooves (112) are located at the same horizontal position.

10. The Hall chip press-fit structure according to claim 7, characterized in that: The bottom end of each of the protruding teeth (221) is a plane and both side surfaces are provided with transitional arc surfaces.

Images