JPH04118641U - temperature detection sensor - Google Patents

Abstract

(57) [Summary] [Purpose] To prevent thermal stress on the temperature sensing element during the assembly process and to ensure dimensional accuracy of the connector part. [Structure] The temperature detection sensor S includes a terminal 1, a fixed part 2, a temperature sensing element 3, a seal part 4, and a case 5. The fixed part 2 supports the temperature sensing element 3 and the terminal 1. The temperature sensing element 3 and the terminal 1 are covered with a sealing part 4. Fixed part 2
is press-fitted into case 5.

Description

[Detailed explanation of the idea]

0001

[Industrial application field]

This idea is a temperature detection sensor that has a temperature sensing element built into the case that has the connector part. Regarding improvements to the sensor.

0002

[Conventional technology]

A conventional temperature detection sensor of this kind is disclosed in Japanese Patent Application Laid-Open No. 2-227624. There was something. In this prior art, the lead wire of the temperature sensing element held by the fixed part is removed. Insert the lead wire into the insertion hole and connect it to the terminal, then insert the subassembly into the insert tree. The case was made of fat molding.

0003

[Problem that the idea aims to solve]

The above-mentioned conventional technology had the following problems. In other words, insert resin molding is performed using thermoplastic materials such as nylon or polyaceter. The subassembly parts are melted at a temperature of 200 (°C) or more, and the subassembly parts are prepared in advance. The molten resin is injected into the set molding die. Therefore, the temperature sensor The child is subjected to so-called high-temperature thermal shock, causing thermal stress and failure. There was a risk of doing so.

0004

[Means to solve the problem]

This idea addresses the above-mentioned issues and is designed to prevent temperature-sensing elements from being In order to prevent thermal stress on the connector and ensure dimensional accuracy of the connector, In a temperature detection sensor that has a temperature sensing element built into a case with a terminal, , a fixed part supporting the terminal, a temperature sensing element connected to one end of the terminal, and a temperature sensing element connected to one end of the terminal. Press fit the sealing part that covers the temperature sensing element together with one end of the terminal and the fixing part. Provided is a temperature detection sensor equipped with a case supported by the temperature detection sensor.

[0005]

【Example】 The attached drawing is a drawing showing a preferred embodiment of the temperature detection sensor S according to this invention. Therefore, Figure 1 is a front view with the main parts cut away, Figure 2 is a right side view, and Figure 3 is the case shown in Figure 1. 5 is a sectional view taken in the direction of arrow A-A of case 5, and FIG. 4 is a cross-sectional view of case 5 shown in FIG. 2 in the direction of arrow B-B. FIG. In the figure, 1 is a terminal. The terminal 1 is supported by a fixed part 2, one of which A temperature sensing element 3 is connected to the end 1a. The temperature sensing element 3 is connected to one end 1 of the terminal 1. It is covered with a seal portion 4 made of, for example, epoxy resin.

[0006] The fixing part 2 is molded from thermoplastic resin, and has positioning protrusions 2 on the side wall. a, 2b, locking claws 2c, 2d, and chamfered portions 2e, 2f. In detail, the position The determining protrusions 2a and 2b are designed to prevent the fixing part 2 from being installed in the wrong direction when the fixing part 2 is installed in the case 5. The dimensions are different from each other so that there is no difference. In addition, the locking claws 2c and 2d have elastic pieces 2g , 2h. In addition, the chamfered portions 2e and 2f are provided with ventilation holes 2i between them and the case 5. , 2j.

[0007] Next, the case 5 is molded from thermoplastic resin, and includes a connector part 5a and a mating part 5a. Stop portion 5b, protrusion 5c, positioning step portions 5d, 5e, recesses 5f, 5g, small bead 5 h, 5i, 5j, 5k, 5l, 5m, and large beads 5n, 5o, 5p, 5q. do. Specifically, the connector portion 5a has the other end 1b of the terminal 1 protruding from the connector portion 5a, and has a waterproof structure. A rubber 6 is provided. Furthermore, the locking portion 5b and the protruding portion 5c can be used, for example, when the temperature detection sensor S is mounted on the vehicle body. This is a structure for the purpose of providing information, and is provided on the outer wall of the case 5.

[0008] Further, the positioning step portions 5d and 5e fit into the positioning protrusions 2a and 2b of the fixed portion 2. There are small beads 5h and 5i. The small beads 5h and 5i prevent the fixed part 2 from wobbling in the axial direction of the case 5. It is something that That is, the small beads 5h and 5i press fit the fixing part 2 into the case 5. When it is pressed, it is crushed by the positioning protrusions 2a and 2b of the fixing part 2, and due to the dimensional tolerance. This prevents the occurrence of looseness.

[0009] Further, the recesses 5f and 5g are parts for hooking the locking claws 2c and 2d of the fixed part 2, The position of the fixing part 2 with respect to the axial direction of the case 5 is set by the recesses 5f and 5g. Ru. In addition, the small beads 5j, 5k, 5l, and 5m are oriented in the direction perpendicular to the axis of the case 5. This prevents the fixed part 2 from wobbling. That is, small beads 5j, 5k, 5l , 5m are for preventing the fixed part 2 from wobbling. That is, the small beads 5j, 5 l, 5m is pushed by the side wall of the fixing part 2 when the fixing part 2 is press-fitted into the case 5. This prevents the occurrence of looseness due to dimensional tolerances. At this time, on the axis of case 5 The position of the fixing part 2 in the orthogonal direction is determined by the large beads 5n, 5o, 5p, and 5q. is set.

0010 The case 5 is filled with a filler 7 inside. The filler 7 is placed in the case 5. It is injected into the case 5 before the fixing part 2 is press-fitted, and is hardened after the fixing part 2 is press-fitted. During the hardening of the filler 7, the vent holes 2i and 2j allow the gas generated by the filler 7 to escape. functions to ventilate the material to the outside or to alleviate the effects of volume changes during curing. .

[0011]

[Effect of the idea]

This device, which has the above-mentioned structural effects, has the following effects. That is, the temperature detection sensor according to this invention has a temperature sensing element and a terminal. Since the fixing part is press-fitted into the case and supported, it is possible to avoid temperature fluctuations during the assembly process. Thermal stress that would cause the sensing element to fail is not applied to the temperature sensing element; In addition, the dimensional accuracy of the connector part must be ensured by crushing the small bead when press-fitting the fixing part. It has excellent effects such as being able to

[Brief explanation of drawings]

FIG. 1 is a front view of a preferred embodiment of the invention, with main parts cut away.

FIG. 2 is a right side view of what is shown in FIG. 1;

FIG. 3 is a cross-sectional view of the case shown in FIG. 1 in the direction of the arrow AA line.

FIG. 4 is a cross-sectional view of the case shown in FIG. 2 in the direction of the arrow BB line.

[Explanation of symbols]

1 terminal 2 Fixed part 3 Temperature sensing element 4 Seal part 5 cases 5h, 5i, 5j, 5k, 5l, 5m small bead 6 Waterproof rubber 7 Filler

Claims (1)

[Scope of utility model registration request] 1. A temperature detection sensor in which a temperature sensing element is installed inside a case having a connector part, which comprises a terminal, a fixed part supporting the terminal, a temperature sensing element connected to one end of the terminal, and a temperature sensing element connected to one end of the terminal. A temperature detection sensor comprising: a seal portion that covers the temperature sensing element together with one end of the terminal; and a case that press-fits and supports the fixing portion.