A single-ended glass-sealed resistor temperature sensor and a manufacturing method thereof

Abstract

The present invention relates to the field of temperature sensors, and in particular to a single-ended glass-sealed resistor temperature sensor and a manufacturing method thereof. It includes a resistor unit, a connecting wire with a connecting portion at the end thereof, wherein the resistor unit includes two resistor pins and a glass-sealed resistor head with a built-in thermistor, wherein one end of the two resistor pins is respectively connected to the two ends of the thermistor, and the other ends of the two resistor pins extend out of the glass-sealed resistor head and bend toward the glass-sealed resistor head to form a bending portion, and the two bending portions are respectively electrically connected to the connecting portion. In the present application, by bending the end of the resistor pin away from the glass-sealed resistor head and forming a bend toward the glass-sealed resistor head to form a bending portion, the OD and length size problems of the subsequent packaging of the overall product after the resistor is welded can be reduced, so that the head size OD and length of the sensor in a specific use environment can be met with more stringent requirements.

Description

Technical Field

[0001] The invention relates to the field of temperature sensors, in particular to a single-ended glass-sealed resistance temperature sensor and a manufacturing method thereof. Background Art

[0002] A temperature sensor is a sensor that can sense temperature and convert it into a usable output signal. Temperature sensors are the core of temperature measuring instruments. They come in many types and can be adapted to a variety of different working environments. However, some working environments have strict requirements on the head size OD and length of the sensor.

[0003] At present, the packaging method of temperature sensors has formed a relatively unified process, but it has not yet been able to meet the problem of small requirements for the OD and length of the sensor head. The details are as follows:

[0004] 1) Glass-sealed resistor: After the glass-sealed resistor is welded to the wire, it is encapsulated with epoxy resin. Generally, to increase the sealing of the product, the encapsulation times will be as many as two or three times. Therefore, the head OD of the product will reach about 5mm and the length will reach 18mm;

[0005] 2) Single-ended glass-sealed resistor: The process of single-ended resistor is similar to that of glass-sealed resistor. The wire is encapsulated with epoxy resin after welding. Due to the different shape of the resistor, the OD size will be improved to a certain extent, but the length is still above 10mm;

[0006] 3) Epoxy resin encapsulated thermistor: Since the resistor itself has been encapsulated with epoxy resin, it is then welded with the wire and then encapsulated with resin for the second time. The OD and length dimensions still cannot reach OD below 3mm and length below 10mm. Summary of the invention

[0007] In order to solve the above problems, the present invention provides a single-ended glass-sealed resistor temperature sensor and a manufacturing method thereof. In the present application, by bending the end of the resistor pin away from the glass-sealed resistor head and forming a bent portion bent toward the glass-sealed resistor head, the OD and length size problems of the subsequent packaging of the overall product after the resistor is welded can be reduced, so that the head size OD and length of the sensor in a specific use environment can be met with more stringent requirements.

[0008] To achieve the above-mentioned purpose, the technical solution adopted by the present invention is: a single-ended glass-sealed resistor temperature sensor, comprising a resistor unit and a connecting wire with a connecting part at the end thereof, wherein the resistor unit comprises two resistor pins and a glass-sealed resistor head with a built-in thermistor, wherein one end of the two resistor pins is respectively connected to the two ends of the thermistor, and the other ends of the two resistor pins extend out of the glass-sealed resistor head and have a bending part bent toward the direction of the glass-sealed resistor head, and the two bending parts are respectively electrically connected to the connecting part.

[0009] Furthermore, the two bending portions are offset in directions away from each other, and the two bending portions are arranged in an "eight" shape.

[0010] Furthermore, a bent connection end parallel to the corresponding connection portion is integrally formed at the end of the bent portion.

[0011] Furthermore, a yielding bent portion is provided at the connection point between the connecting wire and the connecting portion, wherein the two yielding bent portions are bent away from each other, thereby forming a yielding gap between the two yielding bent portions, and the head of the glass-sealed resistor is located on the yielding gap.

[0012] Furthermore, it also includes a heat shrink tube, which wraps the connecting part and the resistance unit.

[0013] Furthermore, the two connecting portions of the connecting wires are parallel to each other.

[0014] The present application also provides a method for manufacturing a single-ended glass-sealed resistor temperature sensor, comprising the following steps: Step 1, welding two resistor pins of a resistor unit to connecting portions of two connecting wires;

[0015] Step 2, bend the end of the resistor pin away from the glass-sealed resistor head to form a bent portion toward the glass-sealed resistor head, and at the same time offset the two bent portions away from each other so that the two bent portions are arranged in an "eight" shape.

[0016] The beneficial effect of the present invention is that in the present application, by bending the end of the resistor pin away from the glass-sealed resistor head and forming a bend toward the glass-sealed resistor head to form a bent portion, the OD and length dimension problems of the subsequent packaging of the overall product after the resistor is welded can be reduced, so that the head size OD and length of the sensor in a specific use environment can be met with more stringent requirements. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the structure of the temperature sensor.

[0018] Figure 2 It is a schematic diagram of the structure of connecting wires.

[0019] Figure 3 It is a structural diagram of the resistance unit.

[0020] Description of the accompanying drawings: glass-sealed resistor head 11, resistor pin 12, bent portion 13, bent connecting end 131, connecting wire 2, connecting portion 21, yielding bent portion 22, yielding gap 23. DETAILED DESCRIPTION

[0021] See also Figure 1-3As shown, the present invention relates to a single-ended glass-sealed resistor temperature sensor, comprising a resistor unit, a connecting wire 2 with a connecting portion 21 at the end thereof, wherein the resistor unit comprises two resistor pins 12 and a glass-sealed resistor head 11 with a built-in thermistor, wherein one end of the two resistor pins 12 is respectively connected to the two ends of the thermistor, and the other ends of the two resistor pins 12 extend out of the glass-sealed resistor head 11 and form a bending portion 13 bent toward the direction of the glass-sealed resistor head 11, and the two bending portions 13 are respectively electrically connected to the connecting portion 21.

[0022] Furthermore, the two bending parts 13 are offset in a direction away from each other, and the two bending parts 13 are placed in an "eight" shape. The two bending parts 13 are placed in an "eight" shape to ensure that the two bending parts 13 maintain a certain distance, avoiding signal interference or direct contact that affects normal operation.

[0023] Furthermore, a bent connecting end 131 parallel to the corresponding connecting portion 21 is integrally formed at the end of the bent portion 13 , and the bent connecting end 131 can be conveniently welded to the connecting portion 21 .

[0024] Furthermore, a yielding bent portion 22 is provided at the connection between the connecting wire 2 and the connecting portion 21, wherein the two yielding bent portions 22 are bent in a direction away from each other, and a yielding gap 23 is formed between the two yielding bent portions 22, and the glass-sealed resistor head 11 is located on the yielding gap 23. The glass-sealed resistor head 11 is bent on the yielding gap 23, which can effectively reduce the length dimension of the overall product.

[0025] Furthermore, a heat shrink tube is included, which wraps the connecting portion 21 and the resistor unit.

[0026] Furthermore, the connection portions 21 of the two connection wires 2 are parallel to each other.

[0027] The present application also provides a method for manufacturing a single-ended glass-sealed resistor temperature sensor, comprising the following steps: Step 1, welding two resistor pins 12 of a resistor unit to connecting portions 21 of two connecting wires 2;

[0028] Step 2, bend the end of the resistor pin 12 away from the glass-sealed resistor head 11 to form a bent portion 13 bent toward the glass-sealed resistor head 11, and at the same time offset the two bent portions 13 in a direction away from each other so that the two bent portions 13 are arranged in an "eight" shape.

[0029] In a specific embodiment, a 5.Φ3.5mm transparent heat shrink tubing is used, with a length of 6.5mm;

[0030] 2. Wire, OD: 1mm, core OD: 0.6mm

[0031] 3. Resistor pin 12OD: 0.2mm, resistor bending length: 1.77mm

[0032] 4.58D small head resistor, resistor head OD: 1.17mm, total length after bending: 5.43mm.

[0033] To summarize, in the present application, by bending the resistor pin 12 away from one end of the glass-sealed resistor head 11 and bending it toward the glass-sealed resistor head 11 to form a bending portion 13, the OD and length dimension problems of the subsequent packaging of the overall product after the resistor is welded can be reduced, so that the head size OD and length of the sensor in a specific usage environment can be met with more stringent requirements.

[0034] The above implementation modes are merely descriptions of the preferred implementation modes of the present invention, and are not intended to limit the scope of the present invention. Without departing from the design spirit of the present invention, various modifications and improvements made to the technical solutions of the present invention by ordinary engineering and technical personnel in the field shall fall within the protection scope determined by the claims of the present invention.

Claims

1. A single-ended glass-sealed resistance temperature sensor, characterized in that: A connection wire comprising a resistor unit and a connecting portion at the end thereof, wherein the resistor unit comprises two resistor pins and a glass-sealed resistor head with a built-in thermistor, wherein one end of the two resistor pins is respectively connected to the two ends of the thermistor, and the other ends of the two resistor pins extend out of the glass-sealed resistor head and bend toward the glass-sealed resistor head to form a bent portion, and the two bent portions are respectively electrically connected to the connecting portion; The two bending parts are offset in the direction away from each other, and the two bending parts are arranged in an "eight" shape; A yielding bent portion is provided at the connection point between the connecting wire and the connecting portion, wherein the two yielding bent portions are bent in directions away from each other, thereby forming a yielding gap between the two yielding bent portions, and the head of the glass-sealed resistor is located on the yielding gap.

2. A single-ended glass-sealed resistance temperature sensor according to claim 1, characterized in that: The end of the bending portion is also integrally formed with a bending connection end which is parallel to the corresponding connection portion.

3. A single-ended glass-sealed resistance temperature sensor according to claim 1 or 2, characterized in that: The device further comprises a heat shrink tube, which wraps the connecting portion and the resistor unit.

4. A single-ended glass-sealed resistance temperature sensor according to claim 1 or 2, characterized in that: The two connecting portions of the connecting wires are parallel to each other.

5. A method for manufacturing a single-ended glass-sealed resistance temperature sensor as claimed in claim 1, characterized in that: The following steps are involved: Step 1, welding two resistor pins of the resistor unit to the connecting parts of two connecting wires; Step 2, bend the end of the resistor pin away from the glass-sealed resistor head to form a bent portion bent toward the glass-sealed resistor head, and at the same time offset the two bent portions in a direction away from each other so that the two bent portions are arranged in an "eight" shape; Step 3, a yielding bend portion is provided at the connection point between the connecting wire and the connecting portion, and the two yielding bend portions are bent away from each other, so that a yielding gap is formed between the two yielding bend portions, and the head of the glass-sealed resistor is located on the yielding gap.

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