JP7008763B1 - Gasket for in-vehicle electrical equipment - Google Patents

Abstract

PROBLEM TO BE SOLVED: To reduce a reaction force applied to a member to be sealed from a gasket for an in-vehicle electric device in a mounted state, and to increase the contact length of the gasket for an in-vehicle electric device to the member to be sealed. SOLUTION: A gasket 1 for an in-vehicle electric device has a sealing member 11 and 12 relative to at least one contact portion of a contact portion with a first sealed member 11 and a contact portion with a second sealed member 12. It has a plurality of lips 2a, 3a arranged side by side so as to face each other in a direction orthogonal to the target facing direction, and the first straight line portions 4 and the second having different angles on each of the mutually facing inner walls of the lips. The straight line portion 5 is formed, and the first straight line portion 4 is formed at a position closer to the sealed member 11 with which the lips 2a and 3a come into contact than the second straight line portion 5, and the inner walls of the lips 2a and 3a facing each other. In each case, the angle 4a formed by the contact surface 13a of the sealed member 11 with the lips 2a and 3a and the first straight line portion 4 is formed to be smaller than the angle 5a formed by the contact surface 13a and the second straight line portion 5. ing. [Selection diagram] Fig. 1

Description

The present application relates to a gasket for an in-vehicle electric device that seals between a first sealed member and a second sealed member facing each other.

Conventionally, as a waterproof seal member, a gasket made of an elastic material formed so as to provide one or a plurality of lips side by side on a contact surface with a housing as described in Patent Document 1 is known. Further, Patent Document 2 describes a gasket capable of extending the durability of the sealing function in a salt-damaged environment by providing an auxiliary sealing portion.

Japanese Unexamined Patent Publication No. 2015-081627 Japanese Patent No. 6470473

In the gasket for in-vehicle electric equipment to be compared with the gasket for in-vehicle electric equipment of the present application, as illustrated in FIG. 8 of the present application, the gasket 90 has a narrow pressure between the two members 11 and 12 in the housing. When the gasket 90 is mounted in the closed state, the gasket 90 is compressed by the two members 11 and 12, and as the amount of compression of the gasket 90 increases, the gasket 90 applies to the two members 11 and 12 of the housing. Since the force increases rapidly, the deformation of the two members, which are the parts of the housing, may increase, resulting in a decrease in sealing performance. In addition, in the gasket for in-vehicle electrical equipment to be compared, it is the length of the part where the gasket is in contact with the two members that are housing parts in order to improve the durability of the sealing function in a salt-damaged environment. When the contact length is increased, the reaction force from the gasket for in-vehicle electrical equipment to be compared is large, so it is necessary to increase the rigidity of the two parts that are the housing parts by increasing the wall thickness and size, and the product cost. Will increase.

The present application discloses a technique made in view of the above-mentioned circumstances, and it is possible to reduce the reaction force applied to the member to be sealed from the gasket for in-vehicle electric equipment under the state where the gasket for in-vehicle electric equipment is attached, and to be sealed. The purpose is to make it possible to increase the contact length of the gasket for in-vehicle electric equipment to the member.

The gasket for an in-vehicle electric device disclosed in the present application is a first sealed member on the ground side of a housing for accommodating the in-vehicle electric device and a lid of the housing, which faces each other with the first sealed member. A gasket for an in-vehicle electric device that seals between the second member to be sealed, and the gasket for the in-vehicle electric device includes a contact portion with the first member to be sealed and the second member to be sealed. A plurality of lips arranged side by side so as to face each other in a direction orthogonal to the opposite direction at least on the contact portion on the ground side of the contact portion of the plurality of lips, and the inner wall of the plurality of lips facing each other. A first straight line portion and a second straight line portion having different angles are formed in each, and the first straight line portion is formed at a position closer to the sealed member with which the lip contacts than the second straight line portion, and the lip is formed. Each of the inner walls facing each other has a shape in which the angle formed by the contact surface of the sealed member with the lip and the first straight line portion is smaller than the angle formed by the contact surface and the second straight line portion. The first straight line portion is in surface contact with the contact portion on the ground side under the compressed state of the gasket for an in-vehicle electric device, and the second straight line portion is not in contact with the contact portion .

In the gasket for in-vehicle electric equipment disclosed in the present application, the first sealed member on the ground side of the housing for accommodating the in-vehicle electric equipment and the lid of the housing, which face each other with the first sealed member. A gasket for an in-vehicle electric device that seals between the second member to be sealed, and the gasket for the in-vehicle electric device includes a contact portion with the first member to be sealed and the second member to be sealed. A plurality of lips arranged side by side so as to face each other in a direction orthogonal to the opposite direction at least on the contact portion on the ground side of the contact portion of the plurality of lips, and the inner wall of the plurality of lips facing each other. A first straight portion and a second straight portion having different angles are formed in each, and the first straight portion is formed at a position closer to the sealed member with which the lip comes into contact than the second straight portion. Each of the inner walls facing each other has a shape in which the angle formed by the contact surface of the sealed member with the lip and the first straight portion is smaller than the angle formed by the contact surface and the second straight portion. In the compressed state of the gasket for in-vehicle electric equipment, the first straight portion is in surface contact with the contact portion on the ground side, and the second straight portion is not in contact with the contact portion. The first straight portion of the plurality of lips comes into surface contact with the sealed member, and the second straight portion of the plurality of lips is the sealed member. Therefore, the reaction force applied to the sealed member from the gasket for the in- vehicle electric device can be reduced, and the sealed member, which is a component of the housing for accommodating the in-vehicle electric device, can be downsized and reduced in cost. Etc. are possible. Further, the sealing function can be improved by ensuring a large contact length in which the first straight portion of the plurality of lips comes into contact with the member to be sealed.

It is sectional drawing of the seal structure for in-vehicle electric equipment using the gasket for in-vehicle electric equipment which concerns on Embodiment 1 of this application. It is sectional drawing for demonstrating in detail the lip shape of the gasket for an on-vehicle electric apparatus which concerns on Embodiment 1 of this application. Relationship between the amount of compression of the gasket for in-vehicle electric equipment when the gasket for in-vehicle electric equipment to be compared and the gasket for in-vehicle electric equipment according to the first embodiment is compressed, the reaction force from the gasket for in-vehicle electric equipment, and the seal length. It is a figure which illustrates by the graph which shows. It is sectional drawing explaining the detailed dimension of the gasket for in-vehicle electric equipment which concerns on Embodiment 1 of this application. It is sectional drawing of the seal structure for in-vehicle electric equipment using the gasket for in-vehicle electric equipment which concerns on Embodiment 2 of this application. It is sectional drawing of the seal structure for in-vehicle electric equipment using the gasket for in-vehicle electric equipment which concerns on Embodiment 3 of this application. It is sectional drawing of the seal structure for in-vehicle electric equipment using the gasket for in-vehicle electric equipment which concerns on Embodiment 4 of this application. It is sectional drawing of the seal structure for in-vehicle electric equipment using an example of the gasket for in-vehicle electric equipment for comparison. It is sectional drawing which shows the example of the compressed state of the gasket for the vehicle-mounted electric equipment of this application which is exemplified in Embodiment 1. FIG. It is a cross-sectional view which shows the compressed state of the gasket for an on-vehicle electric apparatus to be compared, and is the figure for comparison with FIG. It is a perspective view which shows the application example of the gasket for the vehicle-mounted electric equipment of this application to the housing of a vehicle equipment, and is the assembly completion drawing of the housing of a vehicle equipment. It is a perspective view which shows the application example of the gasket for in-vehicle electric equipment to the housing of a vehicle equipment, and is the exploded view of the housing of a vehicle equipment.

Embodiment 1.
The first embodiment of the waterproof seal structure using the gasket for an in-vehicle electric device which is a sealing member and the gasket for an in-vehicle electric device which is a sealing member according to the first embodiment will be described with reference to FIGS. 1 to 4.
FIG. 1 is a sectional view of a seal structure for an in-vehicle electric device using the gasket 1 for an in-vehicle electric device according to the present embodiment, and FIG. 2 is a detailed explanation of the lip shape of the gasket 1 for the in-vehicle electric device according to the present embodiment. FIG. 3 shows a cross-sectional view for making the vehicle-mounted electric device, and FIG. It is a figure which illustrates the relationship with the reaction force from the device gasket 1 and the contact length of the gasket for an on-vehicle electric device to a member to be sealed by a graph.

As shown in FIG. 1, the gasket 1 for an in-vehicle electric device according to the present embodiment has two first sealed members 11 (hereinafter, abbreviated as "sealed member 11") of a housing facing each other. It is a gasket for an in-vehicle electric device which is a single elastic body that seals between a second member to be sealed 12 (hereinafter, abbreviated as “member to be sealed 12”). The gasket 1 for an in-vehicle electric device has two lips, a lip 2a and a lip 3a, in the lower direction in the height direction in contact with the contact surface 13a on the bottom surface of the groove 13 provided on one of the sealed members 11. It has two lips, a lip 2b and a lip 3b, above the height direction in contact with the contact surface 12a on the flat surface of the member 12 to be sealed. In the first embodiment, the sealed member 11 and the sealed member 12 of the housing, which are sealed to each other, are both made of a metal material that is affected by corrosion in a salt-damaged environment. Is.

Next, with reference to FIG. 2, the lip shape of the gasket 1 for an in-vehicle electric device will be described in detail. In FIG. 2, 4 is a first straight line portion on the inner surface of the lip portion, 4a is an angle between the first straight line portion and the contact surface, 5 is a second straight line portion on the inner surface of the lip portion, and 5a is a second straight line portion. The angle between the portion and the contact surface.
As shown in FIG. 1, each of the lips 2a, 2b, 3a, and 3b has two straight portions having different angles on the inner surface thereof, and is formed on the contact surface with the sealed members 11 and 12 of the housing. With respect to the angle 4a between the first straight line portion 4 on the near side and the contact surface 13a on the bottom surface of the groove 13 of the sealed member 11 of the housing, the second straight line portion 5 and the casing on the side close to the center of the gasket for in-vehicle electrical equipment. The angle 5a with the contact surface 13a on the bottom surface of the groove 13 of the member to be sealed 11 of the body has a larger shape. As shown in the figure, the first straight line portion 4 and the second straight line portion 5 of the lips 2a and 3a that come into contact with the contact surface 13a which is the bottom surface of the groove 13 of the member to be sealed 11 are continuous straight lines adjacent to each other. .. Similarly, the first straight line portion 4 and the second straight line portion 5 of the lips 2b and 3b that come into contact with the contact surface 12a which is the lower surface of the sealed member 12 are continuous straight lines adjacent to each other as shown in the figure.

Next, using FIG. 3, the amount of compression when compressing the gasket 90 for an in-vehicle electric device and the gasket 1 for an in-vehicle electric device according to the present application, and the gasket reaction force and the seal for the in-vehicle electric device, which are exemplified in FIG. The relationship with length will be explained.
In FIG. 3, the reaction force A of the gasket for in-vehicle electric equipment to be compared, the seal length B of the gasket for in-vehicle electric equipment to be compared, the reaction force a of the gasket 1 for in-vehicle electric equipment of the present application, and the in-vehicle electric equipment of the present application. The seal length b of the gasket 1 is illustrated in a comparative graph, and 20 is the seal length when the entire surface of the first straight line portion comes into contact with the member to be sealed under the compression of the gasket for in-vehicle electrical equipment of the present application. ..
As shown in FIG. 3, the gasket 1 for in-vehicle electric equipment of the present application has a small increase in reaction force with respect to the gasket 90 for in-vehicle electric equipment to be compared even if the amount of compression increases.
Further, the seal length (the length of the first straight portion 4 + the length of the first straight portion 4) at the time when the first straight portion 4 comes into contact with the sealed members 11 and 12 of the housing is largely secured (first straight portion 4). Since the portion 4 is inclined at an angle of 4a, the seal length can be made larger than that in the case without the inclination).
In the gasket 90 for in-vehicle electric equipment (see FIG. 8), which is an example of the gasket for in-vehicle electric equipment to be compared described in the present specification, the first straight portion 4 of the gasket 1 for in-vehicle electric equipment of the present application is sealed of the housing. When ensuring a seal length of at least the seal length (reference numeral 20 in FIG. 3) at the time of contact with the members 11 and 12, the reaction force from the gasket for in-vehicle electrical equipment is more than doubled (see FIG. 3). ).
From the above, by using the gasket 1 for in-vehicle electric equipment of the present application, it is possible to reduce the reaction force when compressing the gasket for in-vehicle electric equipment. It is possible to reduce the cost by reducing the size and size.
Further, since it is possible to increase the seal length when compressing the gasket for an in-vehicle electric device, it is possible to improve the durability of the seal function when the device is used in a salt-damaged environment.

In FIG. 1, the four angles 4a of the first straight portions 4 of the four lip portions 2a, 2b, 3a, and 3b and the sealed members 11 and 12 which are the parts of the housing are shown as equal angles. However, in the present application, the four angles 4a do not necessarily have to be equal. Similarly, the four angles 5a of the second straight line portion 5 and the sealed members 11 and 12 which are parts of the housing do not necessarily have to be the same angle. Further, in any of the four lip portions 2a, 2b, 3a and 3b, the relationship between the sizes of the angles 4a and 5a may be such that 4a <5a. Further, in order to stably improve the durability of the sealing function, the sealed members 11 and 12, which are parts of the housing, and the gasket for the in-vehicle electric device are provided in the compression direction of the gasket for the in-vehicle electric device shown in FIG. The total of the distances 41 and 42 from the contact surface to the inner end of the first straight portion 4 is set to be smaller than the design minimum compression amount of the gasket 1 for an in-vehicle electric device. In FIG. 4, 41 is the distance in the direction of compression of the gasket for in-vehicle electric equipment from the contact surface 12a of the gasket for in-vehicle electric equipment in the housing component to the end of the first straight portion 4 in the state before compression of the gasket for in-vehicle electric equipment. 42 is the distance in the compression direction of the gasket for the vehicle-mounted electric device from the contact surface 13a of the gasket for the vehicle-mounted electric device to the end of the first straight line portion 4 in the housing component before the gasket for the vehicle-mounted electric device is compressed.

Embodiment 2.
Hereinafter, the second embodiment of the present application will be described, but the description of the parts overlapping with the first embodiment is omitted, and the same parts or the corresponding parts as those of the first embodiment are designated by the same reference numerals.
Hereinafter, with reference to FIG. 5, a seal structure for an in-vehicle electric device using a gasket for an in-vehicle electric device according to the second embodiment will be described. FIG. 5 is a cross-sectional view showing a gasket 6 for an in-vehicle electric device according to the present embodiment. In FIG. 5, 7 is the outer surface of the lip portion, 7a is the angle between the outer surface of the lip portion and the contact surface, and 12a is the contact surface of the second sealed member 12 with the gasket for an in-vehicle electric device.

In the gasket 6 for an in-vehicle electric device according to the second embodiment, each of the lip portions 2a, 2b, 3a and 3b has a contact surface 12a between the outer surface surface 7 of the lip portion and the sealed members 11 and 12 which are parts of the housing. , 13a has an angle of 7a of 90 ° or more, which is larger than that of the first embodiment. When the gasket 6 for an in-vehicle electric device shown in the present embodiment is compressed, each of the lip portions 2a, 2b, 3a, and 3b is compared with the case where the gasket 1 for an in-vehicle electric device shown in the first embodiment is compressed. However, as compared with the first embodiment described above, the gasket 6 for an in-vehicle electric device can be further reduced in reaction force because the gasket 6 is more easily tilted outward. Therefore, it is possible to realize cost reduction by further thinning and downsizing the sealed members 11 and 12, which are parts of the housing. Further, since the seal length is the same as that of the gasket 1 for in-vehicle electric equipment shown in the first embodiment, the equipment is damaged by salt as compared with the case where the gasket 90 for in-vehicle electric equipment (see FIG. 8) to be compared is also used. It is possible to improve the durability of the sealing function when used in an environment.

Further, in FIG. 5, the four angles 7a of the outer surface 7 of each of the four lip portions 2a, 2b, 3a, and 3b and the sealed members 11 and 12 which are the parts of the housing are shown as equal angles. However, in the present application, the four angles 4a do not necessarily have to be the same angle, and it is sufficient that the size of the angle 7a is 7a ≧ 90 ° in any of the lip portions.

Embodiment 3.
Hereinafter, the third embodiment of the present application will be described, but the description of the parts overlapping with the first and second embodiments is omitted, and the same parts or the corresponding parts as those of the first embodiment are designated by the same reference numerals. ..
Hereinafter, with reference to FIG. 6, a seal structure for an in-vehicle electric device using a gasket for an in-vehicle electric device according to the third embodiment will be described. FIG. 6 is a cross-sectional view of a seal structure for an in-vehicle electric device using the gasket 8 for an in-vehicle electric device according to the present embodiment. In FIG. 6, 13 is a gasket mounting groove for an in-vehicle electric device provided in a housing component, 13a is a contact surface with a gasket for an in-vehicle electric device in the gasket mounting groove 13 for an in-vehicle electric device, and 12 is a second sealed surface. The member, 12a, is a contact surface of the second sealed member 12 with a gasket for an in-vehicle electric device.

As shown in FIG. 6, the gasket 8 for an in-vehicle electric device according to the third embodiment has two first sealed members 11 (hereinafter, abbreviated as “sealed member 11”) and a second sealed member 11 facing each other. It is a gasket for an in-vehicle electric device that seals between the member to be sealed 12 (hereinafter, abbreviated as “member to be sealed 12”). The gasket 8 for an in-vehicle electric device has two lips, a lip 2a and a lip 3a, in the lower direction in the height direction in contact with the contact surface 13a on the bottom surface of the groove 13 provided in one of the sealed members 11. A single lip 9 is provided above the height direction in contact with the planar contact surface 12a of the member to be sealed 12. It should be noted that the sealed members 11 and 12, which are parts of the housing, are examples of cases where the members 11 and 12 to be sealed are made of a material such as a resin material that does not corrode even in a salt-damaged environment.

In the case of the seal configuration for in-vehicle electric equipment shown in FIG. 6, the contact surface between the sealed member 11 made of a metal material and the gasket 8 for in-vehicle electric equipment is sealed by the lip 2a and the lip 3a. Similar to Form 1, the sealing length is long, and the durability of the sealing function in a salt-damaged environment can be improved as compared with the gasket 90 for in-vehicle electric equipment (see FIG. 8) to be compared. On the other hand, although the sealing length at the contact portion between the single lip 9 and the sealed member 12 is short, the sealed member 12 is made of a resin or the like that is less corrosive than metal even in a salt-damaged environment. Does not corrode even in a salt-damaged environment.

Since the gasket 8 for in-vehicle electric equipment shown in the present embodiment has a single lip on one side, the gasket for in-vehicle electric equipment is further compressed as compared with the case where the gasket 1 for in-vehicle electric equipment shown in the first embodiment is used. It is possible to reduce the reaction force at the time of this, and it is possible to realize cost reduction by further thinning and downsizing the sealed members 11 and 12, which are parts of the housing.

In a salt-damaged environment, corrosive media such as salt water tend to accumulate in the direction of the ground side when the equipment is installed. Therefore, in the state where the equipment is installed, only the seal portion on the ground side is used as a plurality of lips.

Embodiment 4.
The fourth embodiment exemplifies a more suitable seal structure for an in-vehicle electric device as compared with the third embodiment. As shown in FIG. 7, it is a seal structure for in-vehicle electric equipment that seals between two sheets to be sealed 11 and a member 12 to be sealed facing each other by using a gasket 30 for in-vehicle electric equipment, and is in a device installation state. In the vehicle-mounted electric device 11 on the top surface side, a mounting groove 13 for installing the gasket 30 for the vehicle-mounted electric device is provided, and in the vehicle-mounted electrical device installed state, the vehicle-mounted electricity of the other sealed member 12 on the ground side is provided. The contact surface 12a with the equipment gasket 30 is not provided with a groove shape.

The gasket 30 for an in-vehicle electric device is installed so that the side having the plurality of lips 2a and 3a is on the ground side and the side of the single lip 9 is on the top surface side in the device installation state. Further, in order to prevent the gasket 30 from falling out of the mounting groove 13, fixing protrusions 31 are provided on both side surfaces of the gasket 30 for an in-vehicle electric device. The widthwise dimension between the tips of the pair of fixing protrusions 31 and 31 provided on both side surfaces of the gasket 30 for in-vehicle electrical equipment is larger than the widthwise dimension of the mounting groove 13, and the mounting groove of the member to be sealed 11 is sealed. After the gasket 30 for an in-vehicle electric device is attached to 13, when the member 11 to be sealed is fixed to the member 12 to be sealed, it is possible to prevent the gasket 30 for an in-vehicle electric device from falling off from the member 11 to be sealed.
Further, in a salt-damaged environment, a corrosive medium such as salt water tends to accumulate in the direction of the ground side when the equipment is installed. However, in the configuration shown in FIG. 7, the gasket 30 mounting groove 13 is provided in the sealed member 12 on the ground side. Since it is not provided, it is possible to prevent the invasion of corrosion due to the accumulation of a corrosive medium such as salt water in the mounting groove 13.

By adopting the configurations of the first to fourth embodiments of the present embodiment, the reaction force from the gasket for in-vehicle electric equipment can be reduced as compared with the configuration to be compared, and the sealing function in a salt-damaged environment can be achieved. Since it is possible to improve the durability, it is possible to realize cost reduction by thinning and downsizing the sealed member which is a component of the housing.

9 and 10 show the compressed states of the gaskets for in-vehicle electric devices to be compared, which are exemplified in the first and eighth embodiments. To the contact length 1L (see FIG. 9) of the gasket 1 for in-vehicle electric equipment of the present application to the second sealed member 12 in the first embodiment and to the second to be sealed member 12 in the gasket for in-vehicle electric equipment to be compared. Comparing with the contact length 90L (see FIG. 10) of the gasket 90 for in-vehicle electric equipment, the contact length 1L is sufficiently longer than the contact length 90L, and the sealing performance can be improved.
Further, if the cross-sectional area of the gasket 1 for in-vehicle electric equipment is reduced so that the contact length 1L becomes the same length as the contact length 90L, the weight of the gasket 1 for in-vehicle electric equipment can be reduced. It is useful for in-vehicle electrical equipment that requires lighter weight.

11 and 12 are perspective views showing an example of application of the gasket for an in-vehicle electric device of the present application to a housing of a vehicle device. FIG. 11 is an assembled completed view of the housing of the vehicle equipment, and FIG. 12 is an exploded view of the housing of the vehicle equipment.
As illustrated in FIG. 12, the housing 100 and its lid 101 are used as members to be sealed, and the sealing performance is realized by the gasket 102 for an in-vehicle electric device having an annular planar shape.
That is, the housing 100 in FIGS. 11 and 12 corresponds to the first sealed member 11 in FIGS. 1, 2, 4, 5, 6, 7, 8, 9, and 10, and the lid in FIGS. 11 and 12. The body 101 corresponds to the second sealed member 12 in FIGS. 1, 2, 4, 5, 6, 7, 8, 9, and 10.
The gasket 102 for in-vehicle electric equipment in FIGS. 11 and 12 corresponds to the gasket 1,6,8,30,90 for in-vehicle electric equipment in FIGS. 1,2,4,5,6,7,8,9,10. ..
Further, the cross sections in FIGS. 1, 2, 4, 5, 6, 7, 8, 9, and 10 correspond to the cross sections in XI-XI in FIG. 11 viewed in the direction of the arrow.

A high voltage harness 103 is joined to the housing 100, and the high voltage harness 103 is used as a power line for an in-vehicle electric device (for example, an inverter, etc.) installed in the housing 100.

The above-described embodiment of the present application has the following features.
Feature 1: In a gasket for in-vehicle electrical equipment made of an elastic material that seals between two members, a plurality of lips are attached to either or both of the lip portions that come into contact with the housing parts. prepare. Among the lip portions provided with a plurality of lips, in the two lips located on the outermost side in the width direction of the gasket for in-vehicle electric equipment, the inner wall of the lip portion has two or more straight portions having different angles, and the casing. A gasket for in-vehicle electric equipment having a shape in which the angle of the second straight part on the side near the center of the gasket for in-vehicle electric equipment is larger than the angle of the first straight part on the side closer to the body component. When the amount of compression is less than a certain level, the lip portion is deformed so as to fall outward, so that the reaction force from the gasket for in-vehicle electric equipment is small. When the amount of compression exceeds a certain level, the first straight part comes into contact with the housing, so a large contact length between the housing and the gasket for in-vehicle electrical equipment can be secured, and the durability of the sealing function in a salt-damaged environment is improved. It is possible to do. Even when the amount of compression is further increased, since the second straight line portion is not in contact with the housing, it is possible to suppress a sudden increase in the reaction force of the gasket for an in-vehicle electric device.

Feature 2: In the gasket for in-vehicle electric equipment according to the feature 1, the gasket for in-vehicle electric equipment having a blunt angle of 90 ° or more with respect to the surface of the housing with which the angle of the outer wall of the designated lip portion contacts, and the in-vehicle. When compressing a gasket for electrical equipment, the angle of the outer wall is blunt with respect to the contact surface, so the lip is easily deformed so that it falls outward, and the reaction force from the gasket for in-vehicle electrical equipment when the amount of compression increases. Can be suppressed.

Feature 3: In the gasket for in-vehicle electrical equipment according to Feature 1 or 2, when one of the housings of the sealed member is made of a resin material and the other is made of a metal material. It is a gasket for in-vehicle electrical equipment that has multiple lips only for the seal part in contact with the housing on the metal material side and a single lip for the seal part in contact with the housing on the resin material side. Since corrosion does not invade even in an environment, the durability of the sealing function in a salt-damaged environment can be improved even when only the sealing portion on the side in contact with the metal material has a plurality of lips. Further, the reaction force can be further reduced as compared with the gasket for in-vehicle electric equipment of the feature item 1.

Feature 4: In the gasket for in-vehicle electrical equipment of Feature 1 or Feature 2, with the housing of the member to be sealed installed in the actual equipment, only the seal portion on the ground side has multiple lips and corresponds to the top surface side. It is a gasket for in-vehicle electric equipment having a single lip as a seal portion. Due to the structure of the gasket for in-vehicle electric equipment, in a salt-damaged environment, a corrosive medium such as salt water tends to accumulate in the direction of the ground side when the equipment is installed. Therefore, it is possible to improve the durability of the sealing function in a salt-damaged environment even when a plurality of lips are used only for the sealing portion on the ground side in the device installation state. Further, the reaction force can be further reduced as compared with the gasket for in-vehicle electric equipment of the feature item 1.

Feature 5: In the gasket for in-vehicle electric equipment of any one of the characteristics 1 to 4, when the gasket for in-vehicle electric equipment is used as a waterproof seal for the in-vehicle equipment, it is inevitable in the usage environment. In an in-vehicle device that is subject to salt damage, it is possible to improve the durability of the sealing function of the in-vehicle device by using the gasket for the in-vehicle electric device.

Feature 6: As illustrated in FIG. 2, a gasket for an in-vehicle electric device that seals between a first member to be sealed and a second member to be sealed facing each other, and is used for the in-vehicle electric device. The gasket is arranged so as to face at least one of the contact portion with the first sealed member and the contact portion with the second sealed member so as to face each other in a direction orthogonal to the facing direction. A first straight line portion and a second straight line portion having different angles are formed on each of the inner walls facing each other of the plurality of provided lips, and the first straight line portion is described by the second straight line portion. It is formed at a position close to the member to be sealed with which the lip comes into contact, and each of the inner walls facing each other of the lip has an angle formed by the contact surface of the member to be sealed with the lip and the first straight line portion. , The shape is smaller than the angle formed by the contact surface and the second straight line portion. Further, in the gasket for an in-vehicle electric device having such a structure, the second straight line portion is located on the center side of the first straight line portion in a direction orthogonal to the facing direction between the first sealed member and the second sealed member. positioned.

In each figure, the same sign indicates the same or equivalent part.
Although various exemplary embodiments and examples are described in the present application, the various features, embodiments, and functions described in one or more embodiments are specific embodiments. It is not limited to the application of, but can be applied to the embodiment alone or in various combinations.
Therefore, innumerable variations not exemplified are envisioned within the scope of the techniques disclosed in the present application. For example, it is assumed that at least one component is modified, added or omitted, and further, at least one component is extracted and combined with the components of other embodiments.
It should be noted that each embodiment can be appropriately combined, modified, or omitted.

1,6,8,30,90,102 Gasket for in-vehicle electrical equipment, 2a, 2b, 3a, 3b Lip, 4 First straight part on the inner side surface of the lip part, 4a Angle between the first straight part and the contact surface, 5 Inner side surface of the lip part 2nd straight part, 5a angle between the second straight part and the contact surface, 7 the outer surface of the lip part, 7a the angle between the outer surface of the lip part and the contact surface, 9 single lip, 11 first member to be sealed, 12th. In the second member to be sealed, 12a the contact surface of the second member 12 to be sealed with the gasket for in-vehicle electric equipment, 13 the gasket mounting groove for in-vehicle electric equipment provided in the housing component, and 13a the gasket mounting groove for in-vehicle electric equipment 13. Contact surface with gasket for in-vehicle electric equipment, 20 Seal length when the entire first straight part comes into contact with the member to be sealed under compression of gasket for in-vehicle electric equipment, 31 Fixing protrusion, 41 Before compression of gasket for in-vehicle electric equipment In-vehicle electrical equipment gasket in the state The distance from the contact surface 12a to the end of the first straight line portion 4 in the vehicle-mounted electrical equipment gasket compression direction, 42 Vehicle-mounted electrical equipment gasket in the vehicle-mounted state before compression Electrical equipment gasket Contact length from contact surface 13a to the end of the first straight line portion 4 in the compression direction, 90 In-vehicle electric equipment gasket to be compared, 1L Contact length of the in-vehicle electric equipment gasket of the present application, 90L In-vehicle electricity to be compared Contact length of equipment gasket, 100 housing, 101 lid, 103 high voltage harness.

Claims (5)

A seal is provided between the first sealed member on the ground side of the housing that houses the in-vehicle electrical equipment and the second sealed member that is the lid of the housing and faces the first sealed member. It is a gasket for in-vehicle electrical equipment.
The gasket for an in-vehicle electric device is oriented in a direction orthogonal to the opposite direction to at least the ground-side contact portion of the contact portion with the first sealed member and the contact portion with the second sealed member. It has multiple lips arranged side by side so as to face each other,
A first straight line portion and a second straight line portion having different angles are formed on each of the inner walls facing each other of the plurality of lips.
The first straight line portion is formed at a position closer to the sealed member with which the lip comes into contact than the second straight line portion.
In each of the inner walls facing each other of the lips, the angle formed by the contact surface of the sealed member with the lips and the first straight line portion is smaller than the angle formed by the contact surface and the second straight line portion. It is formed in the shape of
Under the compressed state of the gasket for in-vehicle electric equipment, the first straight line portion is in surface contact with the contact portion on the ground side, and the second straight line portion is not in contact with the contact portion.
Gasket for in-vehicle electrical equipment. In the gasket for in-vehicle electric equipment according to claim 1,
The second straight line portion is located on the center side between both end faces of the gasket in a direction orthogonal to the opposite direction of the first sealed member and the second sealed member from the first straight line portion. Characterized gasket for in-vehicle electrical equipment. In the gasket for an in-vehicle electric device according to claim 1 or 2.
The angle of the outer surface of the gasket for in-vehicle electrical equipment in a direction orthogonal to the opposite direction between the first sealed member and the second sealed member with respect to the contact surface of the sealed member with the lip is , A gasket for in-vehicle electrical equipment characterized by an obtuse angle of 90 ° or more. The gasket for an in-vehicle electric device according to any one of claims 1 to 3.
One of the first sealed member and the second sealed member is made of a resin material, the other is made of a metal material, and the plurality of lips are provided at a portion in contact with the sealed member made of the metal material. A gasket for in-vehicle electrical equipment, characterized in that a single lip is provided at a portion in contact with a member to be sealed made of the resin material. In the gasket for an in-vehicle electric device according to claim 4,
A gasket for an in-vehicle electric device, characterized in that the plurality of lips are located on the ground side and the single lip is located on the top surface side.

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