JPH09317951A - Seal structure, cable holding member, and equipment using seal structure - Google Patents

Abstract

PROBLEM TO BE SOLVED: To facilitate assembling of cables while securing sealability by provid ing circular ribs for pressing the cables inserted into holes all over its circumfer ence. SOLUTION: Height of a first inner rib 521 of a first hole 501 exceeds measurement of a gap between the first hole 501 and a first cable 8a. height of a second inner rib 522 of a second hole 502 exceeds measurement of a gap between the second hole 502 and a second cable 8b. The first cable 8a is pressed by the first inner ribs 521 all over is circumference. The second cable 8b is pressed by the second inner ribs 522 all over its circumference. A circular space between the first cable 8a and the first hole 501 and the circular space between the second cables 8b and the second holes 502 are sealed in water-tight condition.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a seal structure, and more particularly to a water-tight or air-tight seal for an annular space formed between a cable for electrical connection and a substrate having a hole through which the cable is inserted. The present invention relates to a structure, a cable holding member, particularly a cable holding member for holding a cable for electrical connection in a penetrating state provided in a wall body, and an apparatus using the seal structure. .

[0002]

2. Description of the Related Art FIG. 9 is an explanatory view of a seal structure in the prior art, and FIG. 10 is a front view of a bush (5) used in the seal structure of FIG. As shown in the figure, in the above-mentioned sealing structure, a bush (5) having a substantially disk shape for holding the cable (8) for electrical connection in a through hole (91) provided in the wall (9) is inserted. ) Is installed. This Bush (5)
The through hole (9) so that the contact area with the through hole (91) is watertight.
The bush (5) is fitted in (1), and a cross-shaped slit (59) is formed in the center of the bush (5).

In this case, when the cable (8) is pushed into the central portion of the bush (5) from its end, the central portion is divided into a plurality of pieces by the slit (59). , The cable (8) is inserted through the bush (5). In this inserted state, the plurality of pieces and the cable
Fill the gap between (8) and (8) with adhesive (92). As a result, the gap is sealed in a watertight state.

[0004]

However, in this conventional technique, since the adhesive (92) must be filled for the seal, the workability for the seal is poor and the seal structure is It took a long time to assemble. It is an object of the invention of claim 1 to provide a seal structure which facilitates the assembling of a cable while ensuring the sealing property.

It is an object of the invention of claim 6 to provide a cable holding member for use in a sealing structure in which the assembling of the cable is facilitated while ensuring the sealing property. Claim 9
The invention of "includes a casing configured in a watertight state, and a cable holding member for holding a cable for electrical connection in a through hole provided in the casing in a inserted state,
It is an object of the present invention to provide a device used in a sealing structure that secures the sealing property and facilitates the assembling of a cable in the "device using a structure for sealing the through hole in a watertight state".

[0006]

According to a first aspect of the present invention, there is provided "an annular space formed between a cable for electrical connection and a base body having a hole for inserting the cable in a watertight state or A structure for sealing in an airtight state, the cable protruding from the peripheral surface of the hole over the entire circumference, the width of which is smaller than the thickness of the base body, and being inserted into the hole. Is provided with an annular rib that presses all over the circumference. ”

In this structure, when the cable is inserted into the hole of the base body, the annular rib protruding from the peripheral surface of the hole presses the cable over the entire circumference. Further, since the width of the annular rib is formed smaller than the thickness of the base body, the width of contact with the cable in the axial direction of the hole is small.

Here, in the description of claim 1, the "annular rib for pressing the cable in the state of being inserted into the hole over the entire circumference" is specifically, the invention of claim 2. As described above, "the height of the annular rib is larger than the dimensional value of the gap between the hole and the cable".
Further, as in the invention of claim 3, in the "in which the annular rib is integrated with the peripheral surface of the hole portion", the annular rib does not contact the peripheral surface when the cable is inserted. It will not shift.

According to a fourth aspect of the present invention, in which "a plurality of the annular ribs are arranged in the axial direction of the hole", a plurality of pressing portions of the annular ribs in the cable are set in the axial direction. Will be done. According to the invention of claim 5, "at least one end of the hole is
It may be a tapered hole portion whose diameter increases toward the edge side.

According to a sixth aspect of the present invention, there is provided a cable holding member for holding a cable for electrical connection in a penetrating hole provided in a wall body so that the cable can be inserted therethrough. A main body portion having a hole portion, which can be fitted and mounted in the through hole so that a contact portion with the through hole is in a watertight state or an airtight state, and a body portion which projects over the entire circumference from the peripheral surface of the hole portion, An annular rib that is formed to have a width smaller than the thickness of the main body and that presses the cable that is inserted into the hole over the entire circumference. ”

In this structure, when the cable is inserted into the hole of the main body, the annular rib protruding from the peripheral surface of the hole presses the cable over the entire circumference. Since the annular rib is formed so that its width is smaller than the thickness of the main body portion, the contact width with the cable in the axial direction of the hole is small.

Here, in the claim 6, "a main body part which can be fitted and mounted in the through hole so that a contact portion with the through hole is in a watertight state or an airtight state" is specifically, According to a seventh aspect of the present invention, “the body portion is formed so as to project over the entire circumference and the width thereof is smaller than the thickness of the body portion, and the body portion is inserted into the through hole. In this state, the second annular rib that is pressed over the entire circumference by the peripheral surface of the through hole is provided. ”

In this structure, when the main body is inserted into the through hole, the second annular rib is pressed against the peripheral surface of the through hole over the entire circumference. As in the invention of claim 8, "the main body portion, the annular rib, and the second annular rib are integrally formed of rubber, and the annular rib and the second annular rib are the through holes. Located on the same plane that is substantially perpendicular to the axis of "the pressing force applied to the cable from the annular rib and the peripheral surface of the through hole from the second annular rib. The pressing force exerted on the same plane.

According to a ninth aspect of the present invention, there is provided a means for solving the problem that "the cable holding member has a hole through which the cable is inserted, and a contact portion with the through hole is in a watertight state or an airtight state. A main body part that can be fitted and mounted in the through hole
It projects over the entire circumference from the peripheral surface of the hole, and its width is formed smaller than the thickness of the main body, and presses the cable inserted into the hole over the entire circumference. And an annular rib ”.

In this case, the same operation as that of the invention of claim 6 is achieved. Here, the “through hole” may be “provided on the outer wall portion of the casing exposed to the outside” as in the invention of claim 10, and as in the invention of claim 11, It is provided in a partition wall portion that partitions the inside of the casing in a watertight state.

[0016]

As described above, according to the first aspect of the invention, the annular space formed between the cables is simply sealed by the annular rib by simply inserting the cable into the hole. Unlike the above-mentioned conventional technique, it is not necessary to use an adhesive, and the cable can be easily assembled.

Further, since the contact width between the cable and the annular rib in the axial direction of the hole is small,
The pushing force required to insert the cable is small,
Also in this respect, the assembling becomes easy. Further, even if a connector for closing the hole is provided and the cable is relayed through the connector, it is not necessary to use the adhesive, but the configuration of the relay portion of the cable including the connector becomes complicated. On the other hand, according to the first aspect of the invention, since the annular rib only needs to be provided on the peripheral surface of the hole, the structure thereof is simplified. In addition, the connection failure of the cable in the relay section does not occur.

In the invention of claim 3, when the cable is inserted, the annular rib does not shift with respect to the peripheral surface.
The insertion of the cable becomes smooth, and the sealing by the annular rib becomes more reliable. According to the invention of claim 4, since a plurality of pressing portions by the annular rib in the cable are set in the axial direction, the sealing property by the annular rib is further improved.

In the invention of claim 5, since at least one end of the hole is the tapered hole,
By inserting the cable through the tapered hole, the cable can be smoothly inserted into the hole. In the invention of claim 6, the annular space formed between the cables is sealed by the annular ribs only by inserting the cable into the hole of the main body. Since it is not necessary to use an adhesive, the cable can be easily assembled.

Further, since the contact width between the cable and the annular rib in the axial direction of the hole is small,
The pushing force required to insert the cable is small,
Also in this respect, the assembling becomes easy. In the invention of claim 7, the annular space between the peripheral surface of the through hole and the main body is sealed by the second annular rib, so that the configuration for this sealing is simplified.

According to the invention of claim 8, the pressing force applied to the cable from the annular rib and the pressing force applied to the peripheral surface of the through hole from the second annular rib are the same. Since they act on a plane, both pressing forces effectively act on the peripheral surfaces of the cable and the through hole. According to the invention of claim 9, the same effect as that of claim 6 can be obtained.

[0022]

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, embodiments of the present invention will be described.
This will be described with reference to the drawings. [Embodiment 1] FIG. 1 is a perspective view of a remote controller with a TV for a water heater according to Embodiment 1 of the present invention.
FIG. 2 is a sectional view taken along line II-II of the TV-equipped remote controller shown in FIG.

FIG. 3 is a front view of the first bush (5a) used in the television device (1) of FIG. 1, and FIG. 4 is a side view of the first bush (5a) of FIG. FIG. 5 is a sectional view of the first bush (5a) of FIG. 3, taken along line VV. FIG. 6 is a front view of the second bush (5b) used in the television device (1) of FIG.
FIG. 7 is a sectional view of the second bush (5b) of FIG. 6 taken along line VII-VII.

FIG. 8 is a sectional view of the first bush 5a in use. [Structure of each part] * About the television device (1) * The casing (100) of the television device (1) is made of synthetic resin, and as shown in FIGS. 1 and 2, a liquid crystal display type image output portion (11). ) Built-in rectangular box-shaped case body (1a) and a rectangular box-shaped mounting base that is continuous downward with respect to this case body (1a)
(1b) consists of

The case body (1a) is equipped with the image output section (11) so as to be exposed on the front surface thereof. The case body (1a) also has an operation unit (13) and a voice output unit (12) built in so as to be exposed on the front surface thereof. Furthermore,
The case body (1a) is provided with a circuit (14) for displaying an image on the image output unit (11). The mounting base (1b) is
The back surface is continuous with the back surface of the case body (1a) on the same plane, and the front-rear width is smaller than the front-rear width of the case body (1a). At the center of the front wall (101) of the mounting base (1b), a tubular portion (18) protruding rearward is provided. The first through hole (7a) is formed by the hole formed by the tubular portion (18) and the hole formed in the front wall (101) so as to be continuous with the hole with the same diameter. There is. This first through hole (7a)
Serves as an insertion portion for a cylindrical body (23) described later.

Further, the front surface of the front wall (101) has a first through hole (7a).
An annular projecting portion (17) having a substantially triangular cross-section located concentrically with is projectingly provided. The rear wall (102) of the casing (100) is formed with a recessed part (15) which is recessed forward at the boundary position between the case body (1a) and the mounting base (1b), and the bottom of this recessed part (15). At the center of the wall (151) is a protruding tube (1
5a) is provided. A second through hole is formed by the hole formed by the protruding cylinder (15a) and the hole formed in the bottom wall (151) so as to be continuous with the hole with the same diameter.
(7b) is formed. This second through hole (7b) is the first
It is the insertion part of the bush (5a).

In the mounting base (1b), below the recessed portion (15) and above the tubular portion (18), the space inside the mounting base (1b) is partitioned vertically into a watertight state. A wall (16) is provided. The partition wall portion (16) is provided with a third through hole (7c) having an oval cross section that penetrates vertically. The third through hole (7c) serves as an insertion portion of a second bush (5b) described later. * Regarding the remote control device (2) * The casing (200) of the remote control device (2) is a flat rectangular box shape with a small front and rear width. And this casing (20
In (0), a liquid crystal display type display section (21) showing the operation state and a hot water supply operation section (24) for operating the water heater are built in so as to be exposed on the front surface. . The casing (200) is made of synthetic resin.

The casing (200) has a cylindrical body (2
3) is protruding. The inside of this cylinder (23) is the casing
It communicates with the inside of (200). In addition, inside the casing (200), the operation state of the hot water supply operation unit (24) is displayed on the display unit (21).
There is provided a control circuit (22) for displaying an operation signal for remote-controlling the water heater and sending it to the circuit (14). A cable for electrical connection connected to the control circuit (22) is inserted into the tubular body (23) and extends to the outside of the remote controller (2).

The tubular body (23) is fitted in the first through hole (7a) and is attached, and the contact portion with the peripheral surface of the first through hole (7a) is sealed in a watertight state. 1 It is tightly fitted in the packing (3). The outer diameter of this cylinder (23) is
Is set in such a manner that the contact portion with the first packing (3) is sealed in a watertight state when the first packing (3) is inserted into the first packing (3). Therefore, the inside of the casing (100) is kept watertight.

Further, the remote control device (2) and the front wall (1
An annular second packing (4) which surrounds the first through hole (7a) over the entire circumference is interposed between the first and second holes (01). The size of the second packing (4) is set so that the substantially middle portion in the width direction thereof coincides with the annular convex portion (17). Although not shown, the remote control device (2) is screwed to the mounting base (1b). Thereby, the second
The entire packing (4) is compressed by the remote control device (2) and the front wall (101), and the annular protrusion (17) is the second packing.
In contrast to (4), it is in a state of biting over the entire circumference. Therefore, the inside of the casing (100) is also kept watertight by the second packing (4).

The casing (2
00) can be divided into two parts in the front-back direction, and the first part on the front side
The case (25) and the rear second case (26) are fitted in a watertight state. Although not shown, the casing (100) of the television device (1) is also composed of a pair of cases that can be divided into two parts in the front and rear, and these cases are fitted in a watertight state.

* Regarding the first bush (5a) * The first bush (5a) extends from the cylindrical main body portion (50) and one end of the main body portion (50) in the axial direction toward the outer peripheral side. It is configured to include an annular portion (51) and a flange portion (52) protruding from the other end of the main body portion (50) in the axial direction toward the outer peripheral side.

On the outer peripheral surface of the main body (50), between the annular portion (51) and the flange portion (52), a pair of annular first outer ribs (53) projecting over the entire circumference. (53) is provided. Main body (5
The outer diameter of (0) is set to be slightly smaller than the diameter of the second through hole (7b), and the outer diameter of the first outer ribs (53) (53) is set to the second through hole.
It is set slightly larger than the diameter of (7b). Body
(50) has a first hole (5
01) is provided. A certain range from the edge on the side of the annular portion (51) in the first hole portion (501) is a first tapered hole portion (511) whose diameter increases toward the edge. A plurality of annular first inner ribs (521) projecting over the entire circumference are formed on the peripheral surface of the hole on the opposite side of the first tapered hole (511) in the first hole (501). (521) are installed side by side.

A first cable (8a) having a circular cross section for supplying electric power to the circuit (14) is inserted into the first hole (501). The height of the first inner ribs (521) (521) from the peripheral surface of the first hole portion (501) is determined by the gap between the peripheral surface and the inserted first cable (8a). It is set to be larger than the dimension value of. The outer peripheral edges of the first inner ribs (521) (521) are formed in a substantially arc shape.

Further, the main body portion (50) has a plurality of second hole portions (5) penetrating in the axial direction at a position surrounding the first hole portion (501).
02) and (502) are also provided. A certain range from the edge on the side of the annular portion (51) in each second hole portion (502) is a second taper hole portion (512) whose diameter increases toward the edge. A plurality of annular second inner ribs (522) projecting over the entire circumference are formed on the peripheral surface of the hole opposite to the second taper hole (512) in the second hole (502). (522) are installed side by side.

A second cable (8b) having a circular cross section for electrically connecting the circuit (14) and a water heater (not shown) is inserted into the second hole (502). And the second inner rib (522) (522)
The height of the second hole (502) from the peripheral surface is set to be larger than the dimension value of the gap between the peripheral surface and the inserted second cable (8b). ing. Also, the second
The outer peripheral edge of the cross section of the inner ribs (522) (522) is formed in a substantially arc shape.

One of the pair of first outer ribs (53) (53), one of the first inner ribs (521) (521), and the second inner rib (522).
One of (522) is located on the same plane substantially perpendicular to the axis. Also, the other of the pair of first outer ribs (53) (53), another of the first inner ribs (521) (521), and the other of the second inner ribs (522) (522). Tsutomu is located on the same plane as the above, which is substantially perpendicular to the axis.

The outer peripheral surface of the annular portion (51) is a flange portion.
(52) Taper surface (5
1a), and the diameter of the edge is set to be slightly smaller than the diameter of the second through hole (7b). Also, the annular part (5
The distance between 1) and the flange portion (52) is the thickness from the inner surface of the bottom wall portion (151) to the tip surface of the protruding tube (15a), that is, the second
The length substantially coincides with the axial length of the through hole (7b).

* Regarding the second bush (5b) * This second bush (5b) has a pillar-shaped main body (5
5), an annular portion (56) protruding from one end in the axial direction of the main body (55) to the outer peripheral side, and an outer peripheral side extending from the other end in the axial direction of the main body (55). Outlet flange (57)
And a configuration comprising:

On the outer peripheral surface of the main body part (55), like the first bush (5a), an annular shape projecting over the entire circumference between the annular part (56) and the flange part (57). A pair of second outer ribs (58)
(58) is provided. Body part (55) and second outer rib (58)
The outer peripheral dimension of (58) is set in the same relationship as the first bush (5a) with respect to the third through hole (7c). The body portion (55) has a pair of third hole portions (503) penetrating in the axial direction.
(503) is provided. Each third hole (503) is provided with a third taper hole (513), like the first bush (5a). Further, a plurality of third inner ribs (523) (523) having a substantially arcuate cross section are juxtaposed on the peripheral surface of the third hole portion (503) similarly to the first bush (5a).

A third cable (8) having a circular cross section for electrically connecting the circuit (14) and the control circuit (22) is provided in each third hole (503).
c) is inserted. The heights of the third inner ribs (523) (523) are set to the same relationship as the case of the first bush (5a) with respect to the inserted third cable (8c).
The pair of second outer ribs (58) (58) and the third inner ribs (523) (52)
Like 3rd bush (5a) mentioned above, 3) is set so that it is located on the same plane perpendicular to the axis.

The outer peripheral surface of the annular portion (56) is a tapered surface (56a) similar to the first bush (5a). or,
The distance between the annular portion (56) and the flange portion (57) is the third through hole.
It is approximately the same as the axial length of (7c). Each of the first bush (5a) and the second bush (5b) described above is made of integrally molded rubber.

The third cable (8c) is provided with a relay connector (88) which can be separated from the second bush (5b) on the remote control device (2) side. Therefore, the remote control device (2) can be separated from the television device (1). On the contrary, when attaching the remote control device (2) to the TV device (1), connect the relay connector before screwing it in.
Join (88).

[Mounting of the first and second cables (8a) and (8b)] The above first and second cables (8a) and (8) are attached to the television device (1).
To attach b), first bush (5a) first hole (50
1) Insert the first cable (8a) into the
The second cables (8b) (8b) are inserted into the second hole portions (502) (502) of the bush (5a).

At this time, the first inner rib (5) of the first hole (501)
21) The height of (521) is set to be larger than the dimension value of the gap between the peripheral surface of the first hole (501) and the inserted first cable (8a), and The height of the inner ribs (522) (522) is the height of the second hole (502) and the inserted second cable (8b).
Since it is set to be larger than the dimension value of the gap between the first cable (8a) and the first inner ribs (521) (521), the first cable (8a) is pressed over the entire circumference, and the second cable (8b) is pressed. ) Is pressed by the second inner ribs 522, 522 over the entire circumference. Therefore, the annular space between the first cable (8a) and the first hole (501), and the second cable (8b) (8b) and the second hole (5).
The annular space between 02) and (502) is sealed in a watertight state.

After this, one ends of the first and second cables (8a) and (8b) are connected to the circuit (14), and the first bush (5a) is
The casing (100) is inserted into the second through hole (7b) from the inside. At this time, since the diameter of the edge of the tapered surface (51a) of the annular portion (51) of the first bush (5a) is smaller than the diameter of the second through hole (7b), the second through hole (7b) is formed. On the other hand, the annular part (51) can be pushed in smoothly.

By this pushing, the annular portion (51)
Has passed through the second through hole (7b) with its diameter reduced,
With the (51) protruding toward the tip of the protruding tube (15a),
(51) is restored by its elastic return force, and the protruding cylinder (15a)
Is engaged with. In this state, this first
The flange portion (52) of the bush (5a) is in contact with the bottom wall portion (151). Therefore, the projecting cylinder (15a) and the bottom wall (151) are clamped by the annular portion (51) and the flange portion (52), and the first bush (5a) is attached to the casing (100). Will be things.

In this mounted state, the outer diameter of the first outer ribs (53) (53) of the body portion (50) of the first bush (5a) is set to be slightly larger than the diameter of the second through hole (7b). Because it is done, the first
The outer ribs (53) (53) are pressed against the peripheral surface of the second through hole (7b) over the entire circumference. Therefore, the main body (30) and the second through hole (7
The space between b) and is sealed in a watertight state. By mounting the first bush (5a), the second through hole (7b) is closed in a watertight state, and the casing (100) is maintained in a watertight state.

In this structure, unlike the above-mentioned conventional technique, it is not necessary to use an adhesive, and the cable can be easily assembled. Since the widths of the first inner ribs (521) (521) and the second inner ribs (522) (522) are smaller than the width of the first bush (5a) in the axial direction, the first ribs in the axial direction are formed. The contact width between the inner ribs (521) (521) and the first cable (8a) and the contact width between the second inner ribs (522) (522) and the second cables (8b) (8b) are reduced. Therefore, the pushing force required to insert the first and second cables (8a) and (8b) can be small, and in this respect also, the assembling can be facilitated.

The first inner ribs (521) and (521) are integrated with the first hole portion (501), and the second inner ribs (522) and (522) are integrated with the second hole portion (502). Therefore, when the first and second cables (8a) and (8b) are inserted, the first inner ribs (521) (521) and the second inner ribs (522)
(522) does not shift. Therefore, the first and second cables (8a) (8
b) Insertion is smooth and the first inner ribs (521) (52
The seal by the 1) and the second inner ribs 522, 522 becomes more reliable.

The first inner ribs (521) (521) and the second inner ribs (52)
2) Since a plurality of (522) are arranged in the axial direction of the first hole portion (501) and the second hole portions (502) (502), the first inner ribs (521) (52)
The sealability due to 1) and the second inner ribs 522, 522 is further improved. A first tapered hole (511) is provided at one end of the first hole (501), and a second tapered hole (512) is provided at one end of the second hole (502) (502). ) (512) is provided, the first and second cables (8a) and (8b) are inserted from the first and second taper hole portions (511) and (512) to form the first hole portion (501).
Inserting the first and second cables (8a) and (8b) into (502) is smooth.

The above-mentioned pair of first outer ribs (53) (53), the pair of first inner ribs (521) (521), and the pair of second inner ribs (522).
Since (522) is located on the same plane substantially perpendicular to the axis, the first outer ribs (53) (53) to the second through hole (7a)
From the pressing force applied to the first inner rib (521) (521)
The pressing force applied to the cable (8a) and the second inner rib (522)
The pressing force applied from (522) to the second cable (8b) is
It operates on the same plane. Therefore, all the pressing forces described above act effectively.

The first bush (5a) is attached to the casing (100).
Alternatively, the first and second cables (8a) and (8b) may be inserted into the first bush (5a) after being mounted on. Moreover, one end of the first and second cables (8a), (8b) is pre-connected to the circuit (14), and the other end is inserted into the first and second hole portions (501) (502). But it's okay. [Attachment of the third cable (8c)] To attach the above-mentioned third cable (8c) to the above television device (1),
The third cable (8c) is inserted into each of the third hole portions (503) of the second bush (5b).

At this time, the third inner rib (5) of the third hole (503) is
23) Since the height of (523) is set larger than the dimension value of the gap between the peripheral surface of the third hole (503) and the inserted third cable (8c), The cable (8c) is in a state of being pressed over the entire circumference by the third inner ribs (523) (523). Therefore, the annular space between the third cable (8c) and the third hole (503) is sealed in a watertight state.

After this, one end of the third cable (8c) is connected to the circuit (1
4) and connect the second bush (5b) to the partition wall (1
6) Insert from above into the above-mentioned third through hole (7c). At this time, the tapered surface (56) of the annular portion (56) of the second bush (5b) is
Since the diameter of the edge of (a) is smaller than the diameter of the third through hole (7c), the annular portion (56) can be smoothly pushed into the third through hole (7c).

By this pushing, the second bush (5b) is attached to the casing (100) in the same manner as the above-mentioned first bush (5a). In this mounted state, the outer diameter of the second outer ribs (58) (58) of the second bush (5b) is set to be slightly larger than the diameter of the third through hole (7c), so that the second outer rib The ribs (58) (58) are pressed against the peripheral surface of the third through hole (7c) over the entire circumference. Therefore, the space between the body portion (30) and the third through hole (7c) is sealed in a watertight state.

By mounting the second bush (5b), the third through hole (7c) is closed in a watertight state, and the casing (100) is maintained in a watertight state. This second bush (5
Also in b), the same action and effect as the above-mentioned first bush (5a) are exhibited. In this embodiment, the first, second, and third cables (8a), (8b), and (8c) are the "cables" described in the claims. The first, second and third holes (50
1) (502) (503) is the "hole" described in the claims.
It is. The first, second and third inner ribs (521) (522) (52)
3) is the “annular rib” described in the claims. The first and second bushes (5a), (5b) are the "cable holding member" described in the claims. The above-mentioned first and second outer ribs (53) (58) are the "second annular ribs" described in the claims. Second and third through holes (7b) above
(7c) is the "through hole" described in the claims. The casing (100) is the “casing” described in the claims. [Other embodiments]. The aforementioned “annular rib” may not be integrated with the peripheral surface of the aforementioned “hole”. For example, the "annular rib" may be an O-ring held in an annular groove provided on the peripheral surface.

.. In any of the bushes described above, the "taper hole" is provided in the hole for inserting the cable, but the hole may not be provided. . In any of the bushes described above, the outer peripheral surface of the main body portion may be directly pressed against the peripheral surface of the "through hole" over the entire circumference without providing the "outer rib".

[Brief description of drawings]

FIG. 1 is a perspective view of a remote controller with a TV for a water heater according to Embodiment 1 of the present invention.

FIG. 2 is a cross-sectional view taken along the line II-II of the TV-equipped remote controller shown in FIG.

3 is a first bush (5) used in the television device (1) of FIG.
Front view of a)

4 is a side view of the first bush (5a) of FIG.

5 is a sectional view of the first bush (5a) of FIG. 3 taken along line VV.

6 is a second bush (5) used in the television device (1) of FIG.
b) front view

7 is a cross-sectional view of the second bush (5b) of FIG. 6 taken along line VII-VII.

FIG. 8 is a sectional view of the first bush (5a) in use.

FIG. 9 is an explanatory view of a seal structure according to a conventional technique.

FIG. 10 is a front view of a bush (5) used in the seal structure of FIG.

[Explanation of symbols]

 (501) ・ ・ ・ First hole (502) ・ ・ ・ Second hole (503) ・ ・ ・ Third hole (521) ・ ・ ・ First inner rib (522) ・ ・ ・ Second inner rib (523) ・ ・ ・ Third inner rib (8a) ・ ・ ・ First cable (8b) ・ ・ ・ Second cable (8c) ・ ・ ・ Third cable

─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. ⁶ Identification code Internal reference number FI Technical display location H02G 3/22 H02G 3/22 A

Claims (11)

[Claims] 1. A structure for sealing an annular space formed between a cable for electrical connection and a base body having a hole through which the cable is inserted in a watertight state or an airtight state, the peripheral surface of the hole being formed. A sealing structure having an annular rib that projects from the entire circumference of the cable, has a width smaller than the thickness of the base body, and presses the cable inserted into the hole over the entire circumference. . 2. The seal structure according to claim 1, wherein a height of the annular rib is larger than a dimensional value of a gap between the hole and the cable. 3. The seal structure according to claim 1, wherein the annular rib is integrated with the peripheral surface of the hole. 4. The seal structure according to claim 1, wherein a plurality of the annular ribs are arranged in the axial direction of the hole. 5. The seal structure according to claim 1, wherein at least one end of the hole is a tapered hole whose diameter increases toward the edge of the hole. 6. A cable holding member for holding a cable for electric connection in an inserted state in a through hole provided in a wall body, the cable holding member having a hole portion for inserting the cable, A body portion that can be fitted and mounted in the through hole so that the contact portion is in a watertight state or an airtight state; and a body portion that projects over the entire circumference from the peripheral surface of the hole portion and has a width smaller than the thickness of the body portion. And a ring-shaped rib that presses the cable in the state of being inserted into the hole over the entire circumference, and a cable holding member. 7. The body is formed so as to protrude from the outer peripheral surface of the body over the entire circumference thereof and has a width smaller than the thickness of the body.
The cable holding member according to claim 6, further comprising a second annular rib that is pressed by the peripheral surface of the through hole over the entire circumference in a state where the main body portion is inserted into the through hole. 8. The body, the annular rib, and the second annular rib are made of rubber integrally formed, and the annular rib and the second annular rib are with respect to the axis of the through hole. The cable holding member according to claim 7, wherein the cable holding member is located on substantially the same plane at right angles. 9. A watertight casing, comprising: a casing formed in a watertight state; and a cable holding member for holding a cable for electrical connection in a penetrated hole provided in the casing in a watertight state. In the device using a structure for sealing the cable, the cable holding member includes a hole for inserting the cable, and is fitted into the through hole so that a contact portion with the through hole is in a watertight state or an airtight state. The main body part that can be plugged in and installed, and the entire length of the cable that protrudes from the peripheral surface of the hole part over the entire circumference and has a width smaller than the thickness of the main body part and that is inserted into the hole part. A device that uses a seal structure that includes an annular rib that presses around the circumference. 10. The device using the seal structure according to claim 9, wherein the through hole is provided in an outer wall portion of the casing exposed to the outside. 11. The device using the seal structure according to claim 9, wherein the through hole is provided in a partition wall portion that partitions the inside of the casing in a watertight state.