Horizontal negative temperature thermistor

Abstract

The utility model discloses a horizontal negative temperature thermistor, and belongs to the technical field of thermistors. Comprising a pressing piece which is a cylinder, two end faces of the pressing piece are plated with metal layers, each metal layer is provided with a lead, the other end of each lead bends and extends towards the edge of the pressing piece, the axis of the end, away from the pressing piece, of each lead is parallel to the axis of the pressing piece, the pressing piece is sleeved with a wrapping shell, and the wrapping shell is a cylinder containing shell. The inner diameter of the wrapping shell is the same as the diameter of the pressing piece, a containing cavity is formed between the inner wall end face of the wrapping shell and the end face of the pressing piece and filled with heat-conducting glue to form a heat-conducting layer, and a packaging layer is arranged outside the wrapping shell. According to the utility model, the wrapping shell is arranged outside the pressing sheet, the accommodating cavity is formed between the wrapping shell and the pressing sheet, and the accommodating cavity formed between the pressing sheet and the wrapping shell is filled with the heat-conducting glue to form the heat-conducting layer, so that the heat dissipation of the pressing sheet is improved, the overall heat dissipation performance is improved, and the reliability is high.

Description

Technical Field

[0001] The utility model belongs to the technical field of thermistors, and in particular relates to a horizontal negative temperature thermistor. Background Art

[0002] A thermistor is an electronic component that converts temperature changes into resistance changes. The thermistor is assembled by plating a metal layer on the surface of the thermistor chip, installing leads on the metal layer, and wrapping a packaging layer around the leads. However, due to the limited gap between the packaging layer and the thermistor chip, the alternating hot and cold between the thermistor chip and the outside is affected, resulting in a decrease in the reliability of the thermistor. Secondly, thermistors mostly adopt a plug-in structure. When installed on external equipment, although they have good heat dissipation performance, they require a large space, resulting in limited application scenarios. Traditional chip thermistors, although they occupy a small space, will generate a lot of heat during use, causing an impact on external connection equipment. Utility Model Content

[0003] Purpose of the utility model: to provide a horizontal negative temperature thermistor to solve the above problems existing in the prior art.

[0004] Technical solution: A horizontal negative temperature thermistor, including a pressing sheet, which is a cylinder. Both end surfaces of the pressing sheet are plated with metal layers, and leads are installed on each group of metal layers. The other end of the lead is bent and extended toward the edge of the pressing sheet, and the axis of the end of the lead away from the pressing sheet is parallel to the axis of the pressing sheet. A wrapping shell is sleeved on the outside of the pressing sheet, and the wrapping shell is a cylindrical accommodating shell. The inner diameter of the wrapping shell is the same as the diameter of the pressing sheet. A accommodating cavity is formed between the end face of the inner wall of the wrapping shell and the end face of the pressing sheet, and the accommodating cavity is filled with thermal conductive glue to form a thermal conductive layer. An encapsulation layer is provided on the outside of the wrapping shell.

[0005] Preferably, the lead includes a connecting section, a bending section and an installation section, the connecting section is located at the two end surfaces of the pressing sheet and is connected to the metal layer, the bending section is located at the edge of the pressing sheet, the bending section includes a connecting end and a guiding end, the connecting ends are respectively connected to the connecting sections on both sides of the pressing sheet, the axis of the guiding end is parallel to the axis of the pressing sheet, the guiding end is connected to the installation section, and the lead installation sections located on both sides of the pressing sheet are oriented in the same direction.

[0006] Preferably, the wrapping shell includes an upper shell and a lower shell, both of which are open hollow structures, and the upper shell and the lower shell are spliced ​​to form a cylindrical wrapping shell, and a groove is provided at the opening of the upper shell, and a plurality of protrusions are installed on two groups of opposite inner walls of the groove close to the hollow structure, and the protrusions are arranged in a linear array on the inner wall of the groove, and a mounting ring is provided at the opening of the connection between the lower shell and the upper shell, and mounting grooves are provided on two inner walls opposite to the mounting ring, and when the upper shell and the lower shell are in a connected state, the mounting ring in the lower shell is inserted into the groove of the upper shell, and at this time, the protrusion is snapped into the mounting groove to form a limiting connection.

[0007] Preferably, an arc-shaped hole is formed on the side wall of the lower shell, and the arc-shaped hole is arranged opposite to the opening of the lower shell, and the arc-shaped hole is used for the lead wire to pass through.

[0008] Preferably, a spherical shell is installed on one end surface of the upper shell, the spherical shell is a hollow structure, and the hollow structure of the sphere is connected to the hollow structure of the upper shell.

[0009] Preferably, the encapsulation layer is made of silicone resin material.

[0010] Beneficial effects: The utility model relates to a horizontal negative temperature thermistor, which forms a receiving cavity between the wrapping shell and the pressed sheet by installing a wrapping shell outside the pressed sheet, and forms a heat conducting layer by filling the receiving cavity formed between the pressed sheet and the wrapping shell with a heat conducting adhesive, thereby improving the heat dissipation of the pressed sheet, improving the overall heat dissipation performance, improving the reliability of the thermistor, and extending the service life of the thermistor;

[0011] Secondly, by designing the lead with a bent section, the mounting end of the lead is made perpendicular to the chip body, so that the chip body and the mounting portion can be placed parallel to each other during installation, thereby reducing temporary space during installation. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0013] Figure 2 This is a schematic diagram of the lead structure of the utility model;

[0014] Figure 3 It is an overall exploded view of the utility model;

[0015] Figure 4 This is a schematic diagram of the lower shell structure of the utility model;

[0016] Figure 5 It is an exploded view of the package shell of the utility model;

[0017] Figure 6 for Figure 5Enlarged view of point A in the middle.

[0018] Figures 1 to 6 The figures are marked as follows: 1. pressing sheet; 2. lead; 3. wrapping shell; 4. heat conductive layer; 5. packaging layer; 21. connecting end; 22. bending section; 23. mounting section; 31. upper shell; 32. groove; 33. protrusion; 34. lower shell; 35. mounting groove; 36. arc hole; 37. spherical shell; 38. mounting ring. DETAILED DESCRIPTION

[0019] like Figures 1 to 6 As shown, the utility model provides a technical solution: a horizontal negative temperature thermistor, including a pressing sheet 1, a metal layer, two sets of lead wires 2, a wrapping shell 3, a heat conducting layer 4 and a packaging layer 5, the pressing sheet 1 is a cylinder, both end surfaces of the pressing sheet 1 are plated with a metal layer, the lead wires 2 are respectively installed on the metal layer, and the lead wires 2 are used to connect with external equipment, such as Figure 2 As shown, the lead 2 includes a connecting section, a bending section 22 and a mounting section 23, and the connecting section, the bending section 22 and the mounting section 23 are integrally formed to form the lead 2, the connecting section is located at the two end surfaces of the pressing sheet 1 and is connected to the metal layer, the bending section 22 is located at the edge of the pressing sheet 1, the bending section 22 includes a connecting end 21 and a guiding end, the connecting end 21 is connected to the connecting sections on both sides of the pressing sheet 1, the axis of the guiding end is parallel to the axis of the pressing sheet 1, the guiding end is connected to the mounting section 23, and the mounting sections 23 of the lead 2 located on both sides of the pressing sheet 1 face the same direction, so that when the chip is installed with an external device, the chip and the mounting portion are level. The wrapping shell 3 is placed in a row to reduce temporary space during installation. The outer part of the pressing piece 1 is sleeved with a wrapping shell 3, and the wrapping shell 3 is a cylindrical containing shell. The inner diameter of the wrapping shell 3 is the same as the diameter of the pressing piece 1. A containing cavity is formed between the inner wall end face of the wrapping shell 3 and the end face of the pressing piece 1. The containing cavity is filled with thermally conductive adhesive to form a thermally conductive layer 4. An encapsulation layer 5 is provided on the outer side of the wrapping shell 3. The encapsulation layer 5 is made of silicone resin material. The thermally conductive layer 4 is formed by filling the containing cavity formed between the wrapping shell 3 and the pressing piece 1 with thermally conductive adhesive to dissipate heat for the pressing piece 1, thereby improving the overall heat dissipation performance, improving the reliability of the thermistor, and extending the service life of the resistor.

[0020] In a further embodiment, Figures 4 to 6 As shown, the wrapping shell 3 includes an upper shell 31 and a lower shell 34. Both the upper shell 31 and the lower shell 34 are open hollow structures. The upper shell 31 and the lower shell 34 are spliced ​​to form a cylindrical wrapping shell 3. Figure 6As shown, a groove 32 is provided at the opening of the upper shell 31, and a plurality of protrusions 33 are installed on two sets of opposite inner walls of the groove 32 near the hollow structure, and the protrusions 33 are arranged in a linear array on the inner wall of the groove 32. A mounting ring 38 is provided at the opening where the lower shell 34 is connected to the upper shell 31, and mounting grooves 35 are provided on the two inner walls opposite to the mounting ring 38. An arc hole 36 is provided on the side wall of the lower shell 34, and the arc hole 36 is arranged opposite to the opening of the lower shell 34. The arc hole 36 is used for the lead 2 to pass through, that is, when it is needed When placing the pressing piece 1 with the lead 2 installed in the wrapping shell 3, first pass the lead 2 into the lower shell 34 and out from the arc hole 36. At this time, the lower shell 34 is sleeved on a part of the pressing piece 1. After the sleeve connection of the lower shell 34 is completed, the part of the pressing piece 1 that leaks out of the lower shell 34 is sleeved on the upper shell 31. At this time, the mounting ring 38 of the lower shell 34 is inserted into the groove 32 of the upper shell 31, and the protrusion 33 on the inner wall of the groove 32 of the upper shell 31 is clamped in the mounting groove 35. With the cooperation of the protrusion 33 and the mounting groove 35, the upper shell 31 and the lower shell 34 form a limiting connection.

[0021] In a further embodiment, a spherical shell 37 is installed on one end face of the upper shell 31. The spherical shell 37 is a hollow structure. The hollow structure of the sphere is connected to the hollow structure of the upper shell 31. When filling the thermal conductive glue, the design of the spherical shell 37 increases the heat dissipation area and improves the heat dissipation speed.

[0022] The preferred embodiments of the present invention are described in detail above. However, the present invention is not limited to the specific details in the above embodiments. Within the technical concept of the present invention, various equivalent transformations can be made to the technical scheme of the present invention, and these equivalent transformations all belong to the protection scope of the present invention.

Claims

1. A horizontal negative temperature thermistor, characterized in that: The invention comprises a pressing sheet (1), wherein the pressing sheet (1) is a cylinder, and both end surfaces of the pressing sheet (1) are plated with metal layers, and each group of metal layers is provided with a lead wire (2), and the other end of the lead wire (2) is bent and extended toward the edge of the pressing sheet (1), and the axis of the end of the lead wire (2) away from the pressing sheet (1) is parallel to the axis of the pressing sheet (1), and the outside of the pressing sheet (1) is sleeved with a wrapping shell (3), and the wrapping shell (3) is a cylindrical accommodating shell, and the inner diameter of the wrapping shell (3) is the same as the diameter of the pressing sheet (1), and an accommodating cavity is formed between the inner wall end surface of the wrapping shell (3) and the end surface of the pressing sheet (1), and the accommodating cavity is filled with heat-conducting glue to form a heat-conducting layer (4), and the outside of the wrapping shell (3) is provided with a packaging layer (5).

2. A horizontal negative temperature thermistor according to claim 1, characterized in that: The lead wire (2) comprises a connecting section, a bending section (22) and a mounting section (23); the connecting section is located at both end surfaces of the pressing sheet (1) and is connected to the metal layer; the bending section (22) is located at the edge of the pressing sheet (1); the bending section (22) comprises a connecting end (21) and a guiding end; the connecting end (21) is respectively connected to the connecting sections on both sides of the pressing sheet (1); the axis of the guiding end is parallel to the axis of the pressing sheet (1); the guiding end is connected to the mounting section (23); and the mounting sections (23) of the lead wire (2) located on both sides of the pressing sheet (1) face the same direction.

3. A horizontal negative temperature thermistor according to claim 1, characterized in that: The wrapping shell (3) comprises an upper shell (31) and a lower shell (34); the upper shell (31) and the lower shell (34) are both open hollow structures; the upper shell (31) and the lower shell (34) are spliced ​​together to form a cylindrical wrapping shell (3); a groove (32) is provided at the opening of the upper shell (31); a plurality of protrusions (33) are installed on two sets of opposite inner walls of the hollow structure near the groove (32); the protrusions (33) are arranged in a linear array. The lower shell (34) and the upper shell (31) are connected to each other by a mounting ring (38). The mounting ring (38) is arranged on the inner wall of the groove (32). The opening at the connection between the lower shell (34) and the upper shell (31) is provided with a mounting ring (38). Two inner walls opposite to the mounting ring (38) are provided with mounting grooves (35). When the upper shell (31) and the lower shell (34) are in a connected state, the mounting ring (38) in the lower shell (34) is inserted into the groove (32) of the upper shell (31). At this time, the protrusion (33) is snap-fitted into the mounting groove (35) to form a limit connection.

4. A horizontal negative temperature thermistor according to claim 3, characterized in that: An arc-shaped hole (36) is provided on the side wall of the lower shell (34), the arc-shaped hole (36) being arranged opposite to the opening of the lower shell (34), and the arc-shaped hole (36) is used for the lead wire (2) to pass through.

5. A horizontal negative temperature thermistor according to claim 3, characterized in that: A spherical shell (37) is installed on one end surface of the upper shell (31); the spherical shell (37) is a hollow structure; the hollow structure of the spherical shell (37) is connected to the hollow structure of the upper shell (31).

6. A horizontal negative temperature thermistor according to claim 1, characterized in that: The packaging layer (5) is made of silicone resin material.

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