Ceramic chip holder

Abstract

A ceramic chip holder comprises a plurality of wiring terminals and a pair of ceramic clamps, the surfaces of the ceramic clamps are provided with a plurality of grooves, and the wiring terminals are embedded in the grooves respectively. The wiring terminal comprises a clamping body which is a long and thin component, one end of the clamping body is reversely bent in the length direction to form a head pin, the middle of the clamping body forms a rear pin in the direction roughly perpendicular to the clamping body, and the other end of the clamping body forms a hollow thickened tail end sleeve; the clamping body is located in an area between the head pin and the rear pin, a first bending part and a second bending part are sequentially formed in the direction from the head pin to the rear pin, the radius of the first bending part is R1.45 mm, the clamping force of the first bending part on the ceramic chip is maintained at 6 + / -2N, the radius of the second bending part is R0.7 mm, and the clamping force of the second bending part on the ceramic chip is maintained at 20 + / -3N. According to the utility model, the chip is not damaged under large clamping pressure, and the tail design of the ceramic clamp ensures that the bending angle of the terminal is small, thereby ensuring the mechanical strength of the terminal.

Description

Technical Field

[0001] The utility model relates to the field of gas sensors, in particular to a holder for a ceramic chip. Background Art

[0002] Gas sensors, especially nitrogen oxide gas sensors, play an important role in the fields of industry, environmental monitoring and automobile emission control. For applications in the field of automobile emission control, the nitrogen oxide sensor probe is installed in the automobile exhaust pipe, and the operating environment is extremely harsh. During the production test of the nitrogen oxide sensor, the vibration test needs to be done for 94 hours, and the acceleration can reach up to 25G. If the clamping structure of the ceramic chip of the nitrogen oxide sensor is unreliable, it will lead to serious consequences such as electrode short circuit, ceramic chip terminal breakage, ceramic chip falling off or even fragmentation. In addition, the ceramic chip itself has a complex structure, and the material properties determine that its mechanical strength is poor, and there is a risk of damage during the installation process.

[0003] There are many different ceramic chip clamping structures in the prior art, which generally include multiple terminals and a clamp for fixing the terminals. The ceramic chip is clamped in the clamp, and the clamp connects multiple terminals. The ends of the multiple terminals are fixed in the rubber sleeve or the rubber part of the wire. However, the prior art does not optimize the relative position and angle of the clamp, the terminal and the rubber sleeve / wire, resulting in the terminal being in a state of easy breakage, which indirectly leads to the fragility of the nitrogen oxide sensor. Alternatively, another prior art uses a terminal with a thicker thickness, which results in a larger size of the nitrogen oxide sensor and limited usage scenarios. Utility Model Content

[0004] In view of the above problems existing in the prior art, the utility model provides a holder for a ceramic chip.

[0005] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0006] A ceramic chip holder includes a plurality of connection terminals and a pair of ceramic clips, wherein the ceramic clips are provided with a plurality of grooves on their surfaces, and the connection terminals are respectively embedded in the grooves. The connection terminals include: a clamping body, which is a slender member, one end of which is reversely bent along the length direction to form a head pin, the middle part of which is formed along a direction roughly perpendicular to the clamping body to form a rear pin, and the other end of which forms a hollow thickened end sleeve; the clamping body is located in the area between the head pin and the rear pin, and a first bending part and a second bending part are formed in sequence from the head pin to the rear pin, wherein the radius of the first bending part is R1.45mm and the clamping force on the ceramic chip is maintained at 6±2N, and the radius of the second bending part is R0.7mm and the clamping force on the ceramic chip is maintained at 20±3N.

[0007] As an implementation mode of the present utility model, the bending direction of the rear pin is toward the direction of the head pin, and the rear pin clamps the end of the ceramic clip.

[0008] As an embodiment of the present invention, the middle portion of the clamping body, a section between the second curved portion and the rear pin, has a first inclined section, and the first inclined section has an inclined angle of 5 degrees compared to the front section of the clamping body.

[0009] As an embodiment of the present invention, the wall thickness of the clamping body is 0.2 mm, and the tail of the clamping body, the section between the rear pin and the end sleeve has a second inclined section, and the second inclined section has a bending angle of 35 degrees compared with the first inclined section.

[0010] As an embodiment of the present invention, the wall thickness of the clamping body is 0.2 mm, and the tail of the clamping body, the section between the rear pin and the end sleeve has a second inclined section, and the second inclined section has a bending angle of -35 degrees compared with the first inclined section.

[0011] As an implementation mode of the present invention, the bottom end of the ceramic clip protrudes outward to form a chip limiting structure, and the chip limiting structure abuts against the end of the ceramic chip, so that the second bend coincides with the center position of the ceramic chip lead.

[0012] As an embodiment of the present invention, the upper surface of the ceramic clip has a front protrusion and a rear protrusion, the front protrusion defines the bending position of the head pin, and the rear protrusion defines the bending position of the rear pin.

[0013] As an implementation mode of the present utility model, the position of the rear protrusion is opposite to the position of the chip limiting structure.

[0014] As an embodiment of the present invention, the first curved portion and the second curved portion are located between the front protrusion and the rear protrusion.

[0015] As an implementation mode of the utility model, there are eight wiring terminals, and the eight end sleeves of the wiring terminals are fixed in the rubber sleeve, and the eight end sleeves are arranged in four rows with two in a row.

[0016] In the above technical solution, the utility model effectively avoids the damage that may be caused to the chip during the plugging process in the design details of the terminal, and through the coordinated use of other parts, the clamping force of the chip is kept above 120N, and the chip will not be damaged under such a large clamping pressure. At the same time, the tail design of the ceramic clip ensures that the bending angle of the terminal is small, ensuring the mechanical strength of the terminal during use. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1It is a structural schematic diagram of a ceramic chip holder of the utility model;

[0018] Figure 2 is a schematic diagram of a holder disposed in a nitrogen oxide sensor;

[0019] Figure 3 is a schematic diagram of the structure of the ceramic clip;

[0020] Figure 4 It is a schematic diagram of the structure of the terminal block;

[0021] Figure 5 It is a schematic diagram of the structure of the wiring terminal;

[0022] Figure 6 It is a schematic diagram of the structure of the wiring terminal. DETAILED DESCRIPTION

[0023] The following is a further clear and complete description of the technical solutions in the embodiments of the present utility model in conjunction with the accompanying drawings and embodiments. Obviously, the described embodiments are used to explain the technical solutions of the present utility model, and do not mean that all implementation methods of the present utility model have been exhaustively listed.

[0024] Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present invention, and should not be construed as limiting the present invention.

[0025] Reference Figures 1 to 6 The utility model discloses in detail the internal structure design of a nitrogen oxide sensor, especially a clamp structure dedicated to a ceramic chip. The clamp is not only exquisite in structure but also highly functional and can meet the needs of various application scenarios.

[0026] like Figure 1 and Figure 3 As shown, the core component of the clamp includes a pair of symmetrically arranged ceramic clips 1, and a plurality of connecting terminals 2 fixed to the ceramic clips 1. In a conventional configuration, the number of these connecting terminals 2 is eight, but it is worth noting that this number is not absolutely fixed, and technicians in this field can flexibly adjust it according to the specific needs of actual applications to adapt to ceramic chips 3 of different specifications and sizes.

[0027] like Figures 1 to 3As shown, a plurality of grooves are provided on the surface of the ceramic clip 1, and the number and position of the grooves match the terminal 2, which plays a role of precise fixing, and a terminal 2 is embedded in each groove. A pair of ceramic clips 1 are arranged face to face and symmetrically, and each ceramic clip 1 has a top surface (upper surface) and a bottom surface. The upper surface of the ceramic clip 1 has two outwardly protruding parts, namely the front protrusion 11 and the rear protrusion 12. The end of the bottom surface of the ceramic clip 1 protrudes outward to form a chip limiting structure 13, which can be tightly against the end of the ceramic chip 3.

[0028] like Figure 4 As shown, the terminal block 2 is composed of an elongated clamping body 21, one end of which is bent in the reverse direction along the length direction to form a head pin 22; the other end of the clamping body 21 is provided with a hollow thickened end sleeve 24, which is convenient for connection with an external circuit. The middle part of the clamping body 21 is bent roughly perpendicular to the direction of the clamping body 21 to form a rear pin 23. The bending direction of the rear pin 23 can be toward the direction of the head pin 22, that is, the bending direction of the rear pin 23 is opposite to the bending direction of the head pin 22, forming two face-to-face hook shapes. Such a bending method can clamp the two ends of the ceramic clip 1 more firmly and enhance the stability of the connection. As another embodiment of the present utility model, the rear pin 23 may not be bent in the reverse direction to form a structure such as Figure 1 , Figure 2 , Figure 5 and Figure 6 The sleeve ring structure shown can also achieve corresponding technical effects.

[0029] like Figures 4 to 6 As shown, in the area where the clamping body 21 is located between the head pin 22 and the rear pin 23, the first bend 25 and the second bend 26 are specially designed in sequence from the head pin 22 to the rear pin 23. These two bends are not set arbitrarily, but have been strictly calculated and tested. The radius of the first bend 25 is set to R1.45mm. This design allows the clamping force of the clamp on the ceramic chip 3 to be maintained within the range of 6±2N, which not only ensures the stability of the connection, but also avoids damage to the ceramic chip 3 due to excessive clamping force. The radius of the second bend 26 is set to R0.7mm. This design allows the clamping force of the clamp on the ceramic chip to be further increased to 20±3N, ensuring stability and reliability in a high-intensity working environment. The above parameter selection can effectively avoid possible damage to the ceramic chip 3 during the plug-in process, and through the coordinated use of other parts, the clamping force of the ceramic chip 3 is maintained above 120N, and the ceramic chip 3 will not be damaged under such a large clamping pressure.

[0030] Continue to refer to Figure 1 and Figure 2The front protrusion 11 and the rear protrusion 12 of the ceramic clip 1 respectively define the bending positions of the head pin 22 and the rear pin 23, making the installation of the terminal block 2 more accurate and convenient. The bending structures of the head pin 22 and the rear pin 23 are respectively stuck in the positions of the front protrusion 11 and the rear protrusion 12 of the ceramic clip 1, ensuring a stable connection between the terminal block 2 and the ceramic clip 1. The position of the rear protrusion 12 is opposite to the position of the chip limiting structure 13. Such a design not only enhances the symmetry of the structure, but also improves the overall stability and aesthetics. The first bend 25 and the second bend 26 are not only located in the area between the head pin 22 and the rear pin 23, but also between the front protrusion 11 and the rear protrusion 12. This allows the second bend 26 to coincide with the center position of the lead of the ceramic chip 3, further improving the accuracy and stability of the connection.

[0031] like Figure 5 and Figure 6 As shown, the wall thickness of the terminal block 2 is controlled at about 0.2 mm. This wall thickness parameter not only ensures sufficient strength, but also reduces the overall weight of the clamp. The middle section of the clamp body 21 of the terminal block 2, located between the second bend 26 and the rear pin 23, has a first inclined section 211. The first inclined section 211 has a 5-degree bevel angle compared to the front section of the clamp body 21 (i.e., the section of the clamp body 21 between the head pin 22 and the second bend 26). In addition, referring to Figure 1 and Figure 2 In order to cooperate with the rubber sleeve 4 at the rear, the tail of the clamping body 21 of the terminal 2, located between the rear pin 23 and the end sleeve 24, has a second inclined section 212. The end sleeve 24 of the terminal 2 has two structures: one is lifted upward, that is, lifted toward the protruding direction of the rear pin 23, such as Figure 5 Correspondingly, the second inclined section 212 is inclined upward, that is, inclined toward the direction in which the rear pin 23 protrudes. The other is lifted downward, that is, lifted in the opposite direction of the protruding direction of the rear pin 23, as shown in FIG. Figure 6 Correspondingly, the second inclined section 212 is inclined downward, that is, inclined in the opposite direction of the protruding direction of the rear pin 23 .

[0032] like Figure 5 and Figure 6 As shown, if Figure 5 The lifting direction shown is the positive direction, then Figure 6 The lifting direction shown is the opposite direction. The utility model makes the second inclined section 212 of a part of the clamping body 21 have a bending angle of 35 degrees compared with the first inclined section 211. Figure 5 As shown; the second inclined section 212 of the other part of the clamping body 21 has a bending angle of -35 degrees compared to the first inclined section 211, such as Figure 6shown.

[0033] In general, the utility model maintains the bending angle of the tail of the terminal 2 at 35 degrees, which is convenient for installation and removal, and can ensure the stability and durability of the terminal 2 during long-term use. The tail of the ceramic clip 1 is defined as the part of the ceramic clip 1 between the rear protrusion and the rear pin 23, and the tail of the terminal 2 is defined as the part of the terminal 2 between the rear pin 23 and the end sleeve 24.

[0034] Reference Figure 1 and Figure 2 Since there are eight terminals 2 in normal circumstances, there are also eight terminal sleeves 24 of the terminals 2 in normal circumstances, all of which are fixed in a rubber sleeve 4. By setting the 5-degree bevel angle and 35-degree bending angle of the clamping body 21, the eight terminal sleeves 24 can be arranged in four rows, two in a row, and the positions of the terminal sleeves 24 between two adjacent rows are staggered. Such a design can enhance the overall stability, save space in layout, make the structure of the entire clamp more compact and orderly, and effectively protect the terminals 2 from interference and damage from the external environment.

[0035] Those skilled in the art will appreciate that the “installation”, “connection”, “connection” and “coupling” described in the present invention should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected, indirectly connected through an intermediate medium, or connected inside two components. However, if other words have the same purpose, they can be replaced by other expressions.

[0036] As shown in this specification and claims, the words "a", "an", "an" and / or "the" do not specifically refer to the singular, but may include the plural, unless the context clearly implies an exception. In general, the terms "comprises" and "including" only mean that the steps and elements specifically identified are included, which do not constitute an exclusive list, and the method or apparatus may include other steps or elements.

[0037] Those skilled in the art should recognize that the above embodiments are only used to illustrate the present invention and are not intended to limit the present invention. As long as they are within the spirit of the present invention, any changes or modifications to the above embodiments will fall within the scope of the claims of the present invention.

Claims

1. A ceramic chip holder, comprising a plurality of connection terminals and a pair of ceramic clips, characterized in that: The surface of the ceramic clip is provided with a plurality of grooves, and the wiring terminals are respectively embedded in the grooves; The wiring terminal comprises: The clamping body is a slender member, one end of which is bent in the reverse direction along the length direction to form a head pin, the middle part of which is formed along a direction substantially perpendicular to the clamping body to form a rear pin, and the other end of which forms a hollow and thickened end sleeve; The clamping body is located in the area between the head pin and the rear pin, and forms a first bending portion and a second bending portion in sequence from the head pin to the rear pin, wherein the radius of the first bending portion is R1.45mm and the clamping force on the ceramic chip is maintained at 6±2N, and the radius of the second bending portion is R0.7mm and the clamping force on the ceramic chip is maintained at 20±3N.

2. The ceramic chip holder according to claim 1, characterized in that: The bending direction of the rear pin is toward the direction of the head pin, and the rear pin clamps the end of the ceramic clip.

3. The ceramic chip holder according to claim 1, characterized in that: The middle portion of the clamping body, located between the second bent portion and the rear pin, has a first inclined section, and the first inclined section has an inclined angle of 5 degrees compared to the front section of the clamping body.

4. The ceramic chip holder according to claim 3, characterized in that: The wall thickness of the clamping body is 0.2 mm. The tail of the clamping body, a section between the rear pin and the end sleeve, has a second inclined section, and the second inclined section has a bending angle of 35 degrees compared with the first inclined section.

5. The ceramic chip holder according to claim 3, characterized in that: The wall thickness of the clamping body is 0.2 mm. The tail of the clamping body, a section between the rear pin and the end sleeve, has a second inclined section. The second inclined section has a bending angle of -35 degrees compared with the first inclined section.

6. The ceramic chip holder according to claim 1, characterized in that: The end of the bottom surface of the ceramic clip protrudes outward to form a chip limiting structure, and the chip limiting structure abuts against the end of the ceramic chip, so that the second bending portion coincides with the center position of the ceramic chip lead.

7. The ceramic chip holder according to claim 6, characterized in that: The upper surface of the ceramic clip has a front protrusion and a rear protrusion, the front protrusion defines a bending position of the head pin, and the rear protrusion defines a bending position of the rear pin.

8. The ceramic chip holder according to claim 7, characterized in that: The position of the rear protrusion is opposite to the position of the chip limiting structure.

9. The ceramic chip holder according to claim 7, characterized in that: The first curved portion and the second curved portion are located between the front protrusion and the rear protrusion.

10. The ceramic chip holder according to claim 1, characterized in that: There are eight wiring terminals, and eight end sleeves of the wiring terminals are fixed in rubber sleeves. The eight end sleeves are arranged in four rows with two in a row.

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