JP4036969B2 - Waterproof structure - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a waterproof structure that prevents water from entering a first storage chamber from a partition that partitions a case body into a first storage chamber and a second storage chamber.
[0002]
[Prior art]
FIG. 4 shows the connector 1 using a waterproof plug. In this figure, the connector 1 is provided with a terminal accommodating chamber 4 in which a male terminal 3 is accommodated in a housing 2. The housing 2 is provided with a hood portion 6 on which a contact portion 5 of the male terminal 3 with the mating terminal protrudes, and a waterproof plug receiving recess 8 in which the waterproof plug 7 is stored on the rear end side. . The waterproof plug 7 is integrally formed of synthetic rubber or the like, and an insertion hole 10 through which the electric wire 9 is inserted is formed through the inside.
[0003]
In this waterproof plug 7, two electric wires 9 drawn out from the rear end side of the housing 2 are respectively inserted into two insertion holes 10, 10 provided in the waterproof plug 7, thereby being transmitted through the outer peripheral portion of the electric wire 9. Thus, water is prevented from entering the terminal accommodating chamber 4. Further, the outer periphery of the waterproof plug 7 is in close contact with the inner wall of the waterproof plug housing recess 8, thereby preventing water from entering between the outer periphery of the waterproof plug 7 and the inner wall of the waterproof plug housing recess 8.
[0004]
FIG. 5 shows the case body 12 fixed to the device body 11 or the like. The case body 12 is partitioned into a first storage chamber 14 and a second storage chamber 15 by a partition wall 13. The first storage chamber 14 is closed with a cover 16, and a liquid packing 17 is provided between the cover 16 and the case body 12. Thereby, the inside of the first storage chamber 14 is sealed in a waterproof state. A substrate 18 is disposed in the first storage chamber 14.
[0005]
On the other hand, an O-ring 19 is provided between the second housing chamber 15 and the case body 12. In addition, the one wall 12 a of the case body 12 is provided with a vent hole 20 that prevents a pressure difference between the inside and outside of the second storage chamber 15 from being generated. A circuit body 22 to which a plurality of solenoids 21 are attached is disposed in the second storage chamber 15. A branch circuit is formed inside the circuit body 22 by a bus bar (not shown), and a terminal portion 23 of the bus bar projects from the circuit body 22. The terminal portion 23 is connected to the substrate 18 in the first storage chamber 14 through the partition wall 13.
[0006]
Further, the periphery of the insertion portion through which the terminal portion 23 passes through the partition wall 13 is filled with an epoxy resin 24 so that the insertion portion is sealed, and the second accommodation chamber 15 is connected to the first accommodation chamber 14. Infiltration of water is prevented.
[0007]
And in such a case body 12, the waterproofness of the 1st storage chamber 14 is ensured by filling the periphery of the insertion part of the some terminal part 23 which penetrates the partition 13 with the epoxy resin 24, respectively. .
[0008]
[Problems to be solved by the invention]
However, in the waterproof structure of the connector 1 shown in FIG. 4, it takes time to insert the power supply 9 and 9 into the waterproof plug housing recess 8 with the power supplies 9 and 9 inserted through the insertion hole 10 of the waterproof plug 7. . That is, in order to bring the outer periphery of the waterproof plug 7 into close contact with the inner wall of the waterproof plug receiving recess 8, the outer diameter of the waterproof plug 7 needs to be set slightly larger than the inner diameter of the receiving recess 8. In order to insert 7 into the housing recess 8, the waterproof plug 7 must be inserted in a compressed state. As a result, there is a problem that it takes time to insert the waterproof plug 7 into the housing recess 8.
[0009]
On the other hand, in the waterproof structure of the insertion portion through which the terminal portion 23 is inserted through the partition wall 13 shown in FIG. There is a problem that the manufacturing cost is high.
[0010]
In view of the above, an object of the present invention is to provide a waterproof structure in which a waterproof plug can be easily attached and the number of work steps can be reduced to reduce the manufacturing cost.
[0011]
[Means for Solving the Problems]
In order to achieve the above-mentioned object, the invention according to claim 1 is characterized in that a partition that divides the interior of the case body into a first housing chamber and a second housing chamber in which the circuit body is disposed projects from the circuit body. The terminal portion provided is provided with an insertion hole through which the terminal portion is inserted from the second storage chamber side to the first storage chamber side, and a waterproof plug is attached to the second storage chamber side of the terminal portion, A waterproof structure for preventing water from entering the first storage chamber from the insertion hole, and pressing the waterproof plug toward the partition wall when the circuit body is disposed in the second storage chamber A peripheral wall is erected along the protruding direction of the terminal portion from the periphery of the terminal portion of the circuit body, and one side of the waterproof plug is brought into contact with the opening on the second storage chamber side of the insertion hole of the partition wall. A waterproof plug supporting concave portion having a receiving inner wall in contact with and a regulating inner wall with which the outer periphery abuts is provided .
[0012]
In this waterproof structure, a waterproof plug is attached to the second accommodation chamber side of the terminal portion, the terminal portion is inserted into the insertion hole of the partition wall, and protrudes toward the first accommodation chamber side, so that the circuit body is in the second accommodation chamber. When arranged in the side, the pressing peripheral wall of the circuit body presses the waterproof plug toward the partition wall. When the pressing peripheral wall presses the waterproof plug toward the partition wall, the waterproof plug is compressed. Therefore, the inner wall of the insertion hole of the waterproof plug is deformed to the terminal portion side and comes into close contact with the terminal portion. Further, the partition wall and the waterproof plug are brought into close contact with the pressing peripheral wall. This prevents water from entering from the insertion hole of the partition wall.
[0013]
In this case, since it is not necessary to store the waterproof plug in the recessed portion or the like, it is easy to attach the waterproof plug, and no epoxy resin, silicon, or the like is used.
[0015]
Further, in this waterproof structure, a waterproof plug is attached to the second housing chamber side of the terminal portion, the terminal portion is inserted through the insertion hole of the partition wall and protruded to the first housing chamber side, When the waterproof plug is accommodated in the second housing chamber, the peripheral wall of the circuit body presses the waterproof plug toward the partition wall. When the pressing peripheral wall presses the waterproof plug toward the partition wall, the waterproof plug is compressed. Therefore, the inner wall of the insertion hole of the waterproof plug is deformed to the terminal portion side and comes into close contact with the terminal portion. At the same time, the outer peripheral portion of the waterproof plug is deformed outward and comes into close contact with the inner wall of the pressing peripheral wall. Furthermore, since it is pressed by the pressing peripheral wall, one side of the waterproof plug comes into close contact with the receiving inner wall. This prevents water from entering from the insertion hole of the partition wall.
[0016]
In this case, even if the inner diameter of the waterproof plug support recess is set to be slightly larger than the outer diameter of the waterproof plug, the outer periphery of the waterproof plug is deformed to the outside by pressing against the partition wall by the pressing peripheral wall, and the waterproof performance is maintained. Can be secured. Therefore, the work of inserting the waterproof plug into the waterproof plug supporting recess is facilitated.
[0017]
According to a second aspect of the invention, there is provided the first aspect of the invention, wherein a plurality of terminal portions projecting from the circuit body are provided, and the pressing peripheral wall projects from the periphery of the plurality of terminal portions. It is characterized by being.
[0018]
In this waterproof structure, water penetration from the insertion hole is prevented by pressing the waterproof plugs attached to the respective terminal portions toward the partition wall by pressing peripheral walls provided around the plurality of terminal portions.
[0019]
In this case, it is not necessary to fill the insertion portion of each terminal portion with the partition wall with epoxy resin, silicon, or the like. If each terminal portion is inserted into the plurality of insertion holes of the partition wall, the plurality of terminal portions are inserted respectively. The hole can be waterproofed in one operation.
[0020]
According to invention of Claim 3, it is invention of Claim 1 or Claim 2, Comprising: The said circuit body is embed | buried in this main body, and while forming a branch circuit, a main body It is characterized by comprising a bus bar having a plate-like terminal portion projecting from the wall, and the pressing peripheral wall presses the waterproof plug toward the partition wall side by fixing the main body to the partition wall.
[0021]
In this waterproof structure, when the terminal portion of the bus bar is inserted into the insertion hole of the partition wall so as to protrude toward the first storage chamber and the main body is fixed to the partition wall, the pressing peripheral wall presses the waterproof plug toward the peripheral side.
[0022]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the waterproof structure according to the present invention will be described. FIG. 1 shows a part of a case body 25 to which a waterproof structure according to the present invention is applied. FIG. 2A shows a state before the terminal portion 32 is inserted into the insertion hole 26a. ) Shows a state where the waterproof plug 35 is compressed.
[0023]
As shown in FIGS. 1, 2 (a), and 2 (b), the case body 25 is partitioned into a first accommodation chamber 27 and a second accommodation chamber 28 by a partition wall 26. A substrate (not shown) is disposed in the first storage chamber 27, and the inside is sealed. A circuit body 29 is disposed in the second storage chamber 28. The circuit body 29 includes a plate-shaped main body 30 and a bus bar 33 that is built in the main body 30 to form a branch circuit and that has terminal portions 31 and 32 projecting from both sides of the main body 30. The terminal portion 31 projecting from one side is electrically connected to the terminal 34 a of the solenoid 34 disposed in the second storage chamber 28, and the terminal portion 32 projecting from the other side is inserted through the partition wall 26. And it is inserted in the 1st accommodating chamber 27 side, and is conductively connected with the said board | substrate. Further, the terminal portion 32 protruding from the other side is inserted into the insertion hole 35 a of the waterproof plug 35.
[0024]
Further, in the main body 30 of the circuit body 29, a pressing peripheral wall 36 is erected along the protruding direction of the terminal portion 32 around the terminal portion 32 protruding from the other side. The pressing peripheral wall 36 protrudes integrally from the main body 30 so as to surround the terminal portion 32, and the upper surface side is a pressing contact surface 37 that contacts the other side of the waterproof plug 35. Then, in a state where the main body 30 is fixed to the partition wall 26 with the screw 39, the pressing peripheral wall 36 presses the waterproof plug 35 toward the partition wall 26 side.
[0025]
The partition wall 26 is provided with an insertion hole 26 a through which the terminal portion 32 protruding from the other side of the circuit body 29 is inserted. A waterproof plug support recess 38 is formed at the opening edge of the insertion hole 26a on the second storage chamber 28 side. The waterproof plug 35 is inserted and supported in the waterproof plug support recess 38. The waterproof plug support recess 38 is provided with a regulation inner wall 38a facing the outer periphery of the waterproof plug 35 and a receiving inner wall 38b with which one side in the axial direction of the waterproof plug 35 abuts. Further, the inner diameter of the waterproof plug support recess 38 is slightly larger than the outer diameter of the waterproof plug 35 so that when the waterproof plug 35 is compressed and the outer periphery is deformed outward, the regulation inner wall 38a and the outer periphery are in close contact with each other. Is set to
[0026]
The waterproof plug 35 is formed in a cylindrical shape, provided with an insertion hole 35a through which the terminal portion 32 is inserted at the center, and provided with a lip portion 35b on the outer periphery. Further, the outer diameter of the waterproof plug 35 is formed to be the same as or slightly smaller than the inner diameter of the waterproof plug support recess 38, and can be easily inserted into the waterproof plug support recess 38.
[0027]
Next, a procedure for waterproofing between the first storage chamber 27 and the second storage chamber 28 with the waterproof plug 35 will be described.
[0028]
First, the waterproof plug 35 is attached to the terminal 32 by inserting the terminal portion 32 protruding from the circuit body 29 into the insertion hole 35 a of the waterproof plug 35. At this time, the waterproof plug 35 is mounted up to the pressing contact surface 37 of the pressing peripheral wall 36. From this state, the circuit body 29 is arranged on the second housing chamber 28 side of the partition wall 26, the waterproof plug 35 is inserted into the waterproof plug support recess 38, and the terminal portion 32 is inserted into the insertion hole 26 a of the partition wall 26. And it is made to protrude to the 1st storage chamber 27 side. Next, the main body 30 of the circuit body 29 is fixed to the second accommodating chamber 28 side of the partition wall 26 with screws 39. At this time, the pressing peripheral wall 36 presses the waterproof plug 35 toward the partition wall 26 and compresses it with the receiving wall 38b.
[0029]
When the waterproof plug 35 is compressed, the inner wall of the insertion hole 35a of the waterproof plug 35 is deformed toward the inserted terminal portion 32, so that the terminal portion 32 and the inner wall of the insertion hole 35a come into close contact with each other. Further, when the waterproof plug 35 is compressed, the outer periphery of the waterproof plug 35 tends to be deformed outward, but the deformation is restricted by the restriction inner wall 38a. As a result, the outer periphery of the waterproof plug 35 and the regulation inner wall 38a are in close contact with each other. Further, when the waterproof plug 35 is pressed toward the partition wall 26 by the pressing peripheral wall 36, one side in the axial direction of the waterproof plug 36 comes into close contact with the receiving inner wall 38b. As described above, the waterproof plug 36 is assembled to the case body 25, and water does not enter the first accommodation chamber 27 side from the second accommodation chamber 28 side through the insertion hole 26 a of the partition wall 26.
[0030]
According to the present embodiment, since the waterproof plug 35 is compressed by the pressing peripheral wall 36, the outer periphery of the waterproof plug 35 comes into close contact with the regulation inner wall 38a, so the first from the second storage chamber 28 side. Intrusion of water into the storage chamber 27 can be prevented.
[0031]
Further, since the waterproof plug 35 is compressed by the pressing peripheral wall 36, the outer periphery of the waterproof plug 35 comes into close contact with the regulation inner wall 38 a, so that the inner diameter of the waterproof plug support recess 38 is smaller than the outer diameter of the waterproof plug 35. No need to set. As a result, the waterproof plug 35 can be easily inserted into the waterproof plug support recess 38.
[0032]
Also, with respect to the insertion hole 35a provided in the waterproof plug 35, the inner wall of the insertion hole 35a and the terminal portion 32 are brought into close contact with each other as the waterproof plug 35 is compressed, so that the terminal portion 32 can be easily inserted into the insertion hole 35a. The terminal portion 32 can be easily inserted into the insertion hole 35a.
[0033]
Further, since the waterproof plug 35 can be mounted in the waterproof plug support recess 38 simply by attaching the waterproof plug 35 to the terminal portion 32 and fixing the circuit body 29 to the partition wall 26, the mounting operation of the waterproof plug is easy. In addition, since the number of work steps is small, the manufacturing cost can be reduced.
[0034]
Moreover, since the waterproof structure of the present embodiment can be achieved and the rubber waterproof plug is used without using an epoxy resin or silicon, the manufacturing cost can be reduced.
[0035]
Next, another embodiment shown in FIG. 3 will be described. In this embodiment, it is an example of a waterproof structure when the several terminal part 41 is protrudingly provided from the circuit body 40. FIG. As shown in FIG. 3, an elliptical pressing peripheral wall 42 protrudes from the periphery of the plurality of terminal portions 41. In addition, a plurality of individual peripheral walls 43 are formed inside the pressing peripheral wall 42 so as to partition each terminal portion 41.
[0036]
On the other hand, in the partition wall (not shown) in which the insertion holes through which the respective terminal portions 41 are inserted are formed, respectively, as in the above-described embodiment, waterproof plug support concave portions each having a regulation inner wall and a receiving inner wall.
[0037]
Then, with the waterproof plug 35 attached to each terminal portion 41, the circuit body 40 is fixed to the partition wall, whereby the pressing peripheral wall 42 and the individual peripheral wall 43 press the waterproof plug 35 toward the partition wall side. By this pressing, the waterproof plug 35 is compressed in the same manner as in the above-described embodiment, and the inner wall of the regulation and the outer periphery of the waterproof plug are brought into close contact with each other, and the upper inner wall and one side of the waterproof plug are brought into close contact with each other.
[0038]
Thereby, in addition to the same effects as the above embodiment, in this embodiment, a single operation of projecting the plurality of terminal portions 41 toward the first storage chamber 27 and fixing the circuit body 40 to the partition wall. Since a plurality of insertion portions can be waterproofed at a time, the number of work steps can be greatly reduced and the manufacturing cost can be reduced.
[0039]
Furthermore, as a modification of the other embodiment described above, by using one large waterproof plug, the number of work steps can be further reduced, and the manufacturing cost can be further reduced.
[0040]
That is, in the said embodiment, although the waterproof plug was attached to the terminal part 41, respectively, this waterproof plug is united, a some insertion hole is formed, and the terminal part 41 is previously put in each insertion hole of one waterproof plug. By fixing the circuit body 40 to the partition wall in the inserted state, the plurality of inserted portions can be waterproofed by a single operation.
[0041]
In each of the above embodiments, the terminal portion 32 is formed by projecting the bus bar 33 built in the main body 30 from the main body 30. However, the terminal portion 32 is a separate body connected to the branch circuit formed in the main body 30. It may be a terminal.
[0042]
Furthermore, in each of the above-described embodiments, only the example in which the circuit body 29 is fixed to the partition wall 26 has been shown. However, the circuit body 29 can be fixed in a state where the pressing peripheral walls 36 and 42 press the waterproof plug 35. Other fixed structures may be used.
[0043]
Further, in each of the above-described embodiments, the example in which the pressing peripheral walls 36 and 42 are integrally projected from the main body 30 of the circuit body 29 has been described. However, the pressing peripheral walls 36 and 42 are separate from the main body 30. There may be.
[0044]
【The invention's effect】
As described above, according to the first aspect of the present invention, when the pressing peripheral wall presses the waterproof plug toward the partition wall, the waterproof plug is compressed, so that the inner wall of the insertion hole of the waterproof plug and the terminal portion are formed. Because of the close contact, water can be prevented from entering from the insertion hole of the partition wall. In addition, it is not necessary to store the waterproof plug in the recessed portion or the like in a compressed state, the number of work steps is small, and furthermore, since no epoxy resin or silicon is used, the manufacturing cost can be reduced.
[0045]
Further, when the peripheral wall presses the waterproof plug toward the partition wall, the waterproof plug is compressed. Therefore, the inner wall of the insertion hole of the waterproof plug is deformed to the terminal portion side and comes into close contact with the terminal portion, and is waterproof. The outer peripheral portion of the stopper is deformed outward and comes into close contact with the inner wall of the pressing peripheral wall and is pressed by the pressing peripheral wall, so that one side of the waterproof plug comes into close contact with the inner wall of the receiver. Thereby, the infiltration of water from the insertion hole of the partition wall can be prevented.
[0046]
Further, according to the present invention, even if the inner diameter of the waterproof plug support recess is set to be slightly larger than the outer diameter of the waterproof plug, the outer periphery of the waterproof plug is in close contact with the inner wall of the regulation by pressing toward the partition wall by the pressing peripheral wall. The waterproof performance can be ensured, and the waterproof plug can be easily inserted into the waterproof plug support recess.
[0047]
According to the invention of claim 3, it is not necessary to fill the insertion portion of the plurality of terminal portions into the partition wall with epoxy resin, silicon, or the like, and if each terminal portion is inserted into the plurality of insertion holes of the partition wall, a plurality of terminals are provided. The insertion holes through which the respective parts are inserted can be waterproofed by a single operation.
[0048]
According to the invention of claim 3, when the terminal portion of the bus bar is inserted into the insertion hole of the partition wall and protrudes toward the first storage chamber side, and the main body is fixed to the partition wall, the pressing peripheral wall is provided with the waterproof plug on the partition wall side. The waterproof plug can be easily attached.
[Brief description of the drawings]
FIG. 1 is a cross-sectional view showing a part of a case body to which a waterproof structure according to the present invention is applied.
2 is an enlarged view of a waterproof structure portion of the case body shown in FIG. 1, (a) is a cross-sectional view showing a state before the waterproof plug is inserted into the waterproof plug support recess, and (b) is a waterproof plug. It is sectional drawing which shows the state pressed by the press surrounding wall.
FIG. 3 is a perspective view showing a pressing peripheral wall according to another embodiment in which a plurality of terminal portions protrude from a circuit body.
FIG. 4 is a cross-sectional view showing a conventional waterproof structure in a connector.
FIG. 5 is a cross-sectional view showing a conventional waterproof structure in a case body.
[Explanation of symbols]
25 Case body 26 Partition wall 26a Insertion hole 27 First storage chamber 28 Second storage chamber 29, 40 Circuit body 32 Terminal portion 35 Waterproof plugs 36, 41 Pressing peripheral wall 38 Waterproof plug support recess

Claims (3)

The circuit body (27) is divided into a partition (26) that divides the interior of the case body (25) into a first storage chamber (27) and a second storage chamber (28) in which the circuit body (29) is disposed. 29 is provided with an insertion hole (26a) through which the terminal portion (32) projecting from the second storage chamber (28) side is inserted into the first storage chamber (27) side, and the terminal portion ( 32) is provided with a waterproof plug (35) on the second storage chamber (28) side to prevent water from entering the first storage chamber (27) from the insertion hole (26a) of the partition wall (26). A pressing peripheral wall (36) that presses the waterproof plug (35) toward the partition wall (26) in a state where the circuit body (29) is disposed in the second storage chamber (28). ) was erected along the periphery in the projecting direction of the terminal portion (32) of the terminal portion of said circuit body (29) (32), said partition wall (26 The opening of the insertion hole (26a) on the second storage chamber (28) side has a waterproof inner wall (38b) with which one side of the waterproof plug (35) abuts and a regulated inner wall (38a) with which the outer periphery abuts. A waterproof structure provided with a stopper support recess (38) . The terminal portion (41) protruding from the circuit body (40) is provided, and the pressing peripheral wall (42) protrudes from the periphery of the plurality of terminal portions (41). Waterproof structure characterized by being installed . The circuit body (29) according to claim 1 or 2, wherein the circuit body (29) is embedded in the main body (30) to form a branch circuit. And a bus bar having a plate-like terminal portion (32) projecting from (30), and the main body (30) is fixed to the partition wall (26), whereby the pressing peripheral wall (36) is a waterproof plug. A waterproof structure characterized by pressing (35) toward the partition wall (26) .

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