JP2562115Y2 - Liquid level alarm device for reservoir - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION The present invention relates to a float formed in a lower part of a reservoir body made of a synthetic resin and formed in the lower part of the reservoir body, which is separated from a liquid chamber formed in the reservoir body. The reed switch that conducts when is at the lower limit position is housed in the housing hole, and both ends of the reed switch and a pair of lead wires are connected via a pair of connectors that can be connected and separated from each other. One relates to a reservoir level alarm device fixed to a reservoir body.

[0002]

2. Description of the Related Art Conventionally, such an apparatus is disclosed in, for example,
It is already known from, for example, JP-A-325362.

[0003]

However, in the above-mentioned conventional device, a storage hole having an inner end closed and an outer end opened is provided at a lower portion of the reservoir body, and one of a pair of connectors is provided outside the storage hole. The connector is detachably fixed to the reservoir body so as to close the end, and the connector fixed to the reservoir body is provided with a pair of connection terminals connected to the lead frame stored in the storage hole. . However, it is unavoidable that rattling occurs between the reservoir main body and the connector detachably fixed to the reservoir main body, and when one of the two connectors is connected or disconnected, one of the connectors rattles against the reservoir main body. For this reason, there is a possibility that a failure such as disconnection may occur at a connection between one connector and the reed switch.

The present invention has been made in view of such circumstances, and has as its object to provide a liquid level alarm device for a reservoir that prevents the occurrence of disconnection due to the work of connecting and disconnecting a pair of connectors.

[0005]

According to the present invention, a storage hole having one end opened to the side of the reservoir body is provided at a lower portion of the reservoir body. One end of the storage hole is provided integrally with the other end of the storage hole, and a support member housed in the storage hole is connected to the lid member that removably closes one end of the storage hole. The tip ends of a pair of lead frames connected to the reed switch supported by the connector protrude into the one connector as connection terminals.

[0006]

BRIEF DESCRIPTION OF THE DRAWINGS FIG.

FIGS. 1 to 3 show a first embodiment of the present invention. FIG. 1 is a longitudinal sectional view of a master cylinder and a reservoir, FIG. 2 is an enlarged sectional view taken along line 2-2 of FIG. FIG. 3 is a sectional view taken along line 3-3 in FIG. 2.

First, in FIG. 1, a tandem master cylinder M for a vehicle brake includes a front piston 7 having a front end facing a front hydraulic chamber 6 and a front piston 7 in a cylinder hole 5a of a cylinder body 5. And a rear piston 9 defining a rear hydraulic chamber 8 is slidably fitted.

Above the cylinder body 5, a hydraulic fluid supply cylinder 10 for supplying hydraulic fluid to the front hydraulic chamber 6 and a hydraulic fluid supply cylinder 11 for supplying hydraulic fluid to the rear hydraulic chamber 8 are provided. Are protruded integrally at an interval in the front and rear.

Referring also to FIG. 2, a reservoir R is connected to an upper portion of the cylinder body 5, and a reservoir body 12 of the reservoir R has a fluid chamber 17 for storing a hydraulic fluid.
Is formed of a synthetic resin in the shape of a bottomed cylinder with an open upper portion to form. A coupling projection 5b is provided at the upper part of the cylinder body 5, and the screw member 4 is inserted into a bracket 12a provided at the center of the bottom of the reservoir body 12.
6 is screwed into the coupling projection 5b. The reservoir body 12
A pair of front and rear liquid feed pipes 13 and 14 are integrally provided at a lower portion of the seal member 1, and these liquid feed pipes 13 and 14 are attached to the sealing member 1.
The hydraulic fluid supply cylinders 10 and 11 are fitted through the hydraulic fluid supply cylinders 10 and 11 via the reference numerals 5 and 16. In addition, the lower part of the reservoir body 12
Partition walls 47, 48 surrounding the openings of the liquid supply pipes 3 and 14 to the liquid chamber 17 are provided.
Even if a hydraulic pressure failure occurs in one of the hydraulic systems connected to each of the hydraulic circuits 3 and 14, the other hydraulic system functions to secure the minimum hydraulic fluid on the other side. A lid 18 is detachably attached to an upper open end of the reservoir body 12, and a filter 19 is attached to an upper portion inside the reservoir body 12.

In the lower part of the reservoir main body 12 in the liquid chamber 17, a guide portion 20 which is formed in a cylindrical shape to allow the hydraulic fluid to flow between the outside and the upper portion is provided integrally with the guide portion 20. A float 21 that moves up and down in response to a change in the level of the hydraulic fluid is housed inside, and a magnet 22 is fixed to a lower portion of the float 21.

In the lower part of the reservoir main body 12, there is formed a storage hole 23 which is separated from the liquid chamber 17 in the reservoir main body 12, and when the float 21 reaches the lower limit position in the liquid chamber 17. The conducting reed switch 24 is in the storage hole 2
3

Both ends of the reed switch 24 are provided with a female connector 26 provided integrally with the reservoir body 12, and a male connector 2 which can be fitted and resiliently engaged with the female connector 26.
7 are connected to a pair of lead wires 25 ₁ and 25 ₂ connected to the male connector 27.

At the lower part of the reservoir body 12 below the float 21, a storage hole 23 having an axis perpendicular to both the vertical direction of the float 21 and the axis of the cylinder body 5 of the master cylinder M, A large-diameter fitting hole 28 which is open to the side and coaxially communicates with one end of the storage hole 23 is provided with a stepped portion 29 facing outward formed therebetween. Thus to the fitting hole 28, which is closed by a detachable lid member 30 _1, the lid member 30 ₁ is small bottomed cylindrical portion 3 which is fitted in the accommodation hole 23
A large-diameter cylindrical portion 30b to be fitted in the fitting hole 28 is continuously provided at 0a, and is formed into a stepped bottomed cylindrical shape by a synthetic resin. An engaging claw 31 protruding outward in the radial direction is provided on the side of the large-diameter cylindrical portion 30b, so that the fitting hole 2 is provided.
By the engagement claw 31 to resiliently engage an opening to the locking hole 32 provided in the lower portion of the reservoir body 12 to 8 the inner surface of one end of the fitting hole 28 i.e. receiving hole 23 in the lid member 30 ₁ Closed. Further, an annular seal member 33 is mounted on the outer periphery of the bottomed cylindrical portion 30a, and the fitting hole 28
The sealing member 33 is interposed between the lid member 30 ₁ and a stepped portion 29 in a state that closes the.

Referring also to FIG. 3, a pair of grooves 35 ₁ ,.
35 ₁ are provided extending in the axial direction. On the other hand, the lid member 30
_At the inner end of ₁ , that is, at the distal end closed portion of the bottomed cylindrical portion 30 a,
Wherein the two side portions both grooves 35 _1, 35 has the base end of the supporting portion 36 ₁ that is housed in the ₁ to fit allowed by accommodating hole 23 is provided integrally, the supporting portion 36 ₁ in the receiving hole 23 both side ends of the support portions 36 ₁ when inserted is the detent support portion 36 ₁ is performed by engaging the groove 35 _1, 35 _1. Also the tip of the supporting portion 36 ₁ is the disk portion 36a is provided integrally.

The female connector 26, the reservoir body 12 so as to extend through the partition walls 37 ₁ to the other end of the receiving hole 23
The partition 37 ₁ is provided with a fitting recess 38 for fitting the disk portion 36 a facing the storage hole 23, and the fitting recess 38 and the female connector 26 are provided in the partition 37 _1. A pair of insertion holes 39 extending across are provided in parallel.

The reed switch 24 is connected to the support 36 ₁
And a pair of lead frames 40 and 41 connected to both ends of the reed switch 24.
There are embedded in the support portion 36 _1. These lead frames 40 and 41, which are formed as a strip of rectangular cross section by stamping of a copper alloy plate or brass plate, to be fixedly supported by the supporting portion 36 ₁ by integral molding binding it also would lead switch 24 is fixedly supported on the support portion 36 ₁ by both ends thereof of the lead frame 40 and 41 are connected. The ends of both lead frames 40 and 41 project in parallel from the disk portion 36a to the female connector 26 side, and the lid member 30 ₁
Are fitted and fixed in the fitting holes 28, and the ends of both lead frames 40, 41 are inserted through the insertion holes 39.
And the connection terminals 40a, 41 of the female connector 26.
Functions as a. Therefore, when the two connectors 26 and 27 are connected, the connection terminals 40a and 41a are connected to connection terminals (not shown) in the male connector 27 connected to the two lead wires 25 ₁ and 25 _2. become.

Next, the operation of the first embodiment will be described. A storage hole 23 having one end opened to the side of the reservoir main body 12 is provided at a lower portion of the reservoir main body 12, and the female connector 26 is provided with a storage hole. provided integrally continuous to the other end 23, the lid member 30 ₁ for removably closing one end of the receiving hole 23, the supporting portion 36 ₁ for fixedly supporting the reed switch 24 is provided integrally, Reed switch 2
Since the tips of the pair of lead frames 40 and 41 connected to the connector 4 protrude into the female connector 26 as the connection terminals 40a and 41a, when the connection / separation of the male connector 27 from the female connector 26 is performed, The female connector 26 does not rattle with respect to the reservoir body 12, so that no excessive force acts on the connection between the lead frames 40, 41 and the reed switch 24, and the two connectors 2
No disconnection occurs during the connection / separation work of 6, 27.

4 and 5 show a second embodiment of the present invention. FIG. 4 is a sectional view corresponding to FIG. 2 of the first embodiment, and FIG. 5 is a sectional view taken along line 5-5 in FIG. FIG.

The cover member 30 _2, the large diameter cylindrical portion 30b is formed into a bottomed cylindrical stepped formed by continuously arranged, it is fitted detachably in the fitting hole 28 in the bottomed cylindrical portion 30a is only that, the engaging claw 31 of the first embodiment is not provided on the cover member 30 _2. Also the inner edge of the lid member 30 _2, the base end of the supporting portion 36 ₂ which is formed in its cross-section substantially T-shaped are provided integrally on the inner surface of the receiving hole 23, the supporting portion 36 ₂ groove 35 ₂ one form of fitting the side edge is provided to extend in the axial direction. Thus were the side end of the supporting portion 36 ₂ when inserted into the supporting portion 36 ₂ receiving hole 23 so that the detent of the supporting portion 36 ₂ is performed by engaging the groove 35 _2.

[0021] The female connector 26, the other end of the accommodation hole 23 as continuous through the partition wall 37 ₂ is intended to be formed integrally with the lower portion of the reservoir body 12, the partition wall 37 ₂
In this case, a small-diameter fitting hole 42 on the storage hole 23 side and a large-diameter fitting hole 43 on the female connector 26 side are formed coaxially by forming a step 44 therebetween. On the other hand, the tip portion of the supporting portion 36 _2, the small-diameter fitting hole bottomed cylindrical which is open to the female connector 26 side has an outer diameter capable of fitting to 42 fitting tube 36b
Are provided integrally with each other, and the small-diameter fitting hole 42 and the large-diameter fitting hole 43 are provided on the side of the fitting cylindrical portion 36b.
A plurality of engaging claws 45... Which are resiliently engaged with the step portion 44 when the 6 b is fitted are provided.

Furthermore the tip of the pair of lead frames 40 and 41 continuous to both ends of the reed switch 24 which is fixedly supported is embedded in the support portion 36 ₂ on the support 36 _2,
Connection terminals 40a of the female connector 26, protrudes from the distal end of the support portion 36 ₂ to function as 41a.

[0023] The second embodiment also, the female connector 26 continuous to the accommodating hole 23 is provided integrally with the lower portion of the reservoir body 12, the lid member 30 ₂ detachably closing one end of the housing hole 23 the support portion 36 ₂ for fixedly supporting the reed switch 24 is provided integrally, the projecting distal end of the pair of lead frames 40 and 41 connected to the reed switch 24 is in the female connector 26 connection terminals 40a, as 41a Therefore, as in the first embodiment, both connectors 2
No disconnection occurs during the connection / separation work of 6, 27.

Although the embodiments of the present invention have been described in detail, the present invention is not limited to the above embodiments, and various designs can be made without departing from the present invention described in the claims for utility model registration. Changes can be made.

For example, a male connector may be provided integrally with the reservoir body.

[0026]

As described above, according to the present invention, a storage hole having one end opened to the side of the reservoir body is provided at the lower portion of the reservoir body, and one of the two connectors is connected to the other of the storage hole. A support member housed in the storage hole is connected to the lid member integrally provided to be connected to the end and removably closing one end of the storage hole, and connected to a reed switch supported by the support portion. Since the tips of the pair of lead frames protrude into the one connector as connection terminals, the connector fixed to the reservoir body side during connection / separation work of the two connectors does not rattle. No disconnection occurs during the separation operation.

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional view of a master cylinder and a reservoir according to a first embodiment.

FIG. 2 is an enlarged sectional view taken along line 2-2 of FIG.

FIG. 3 is a sectional view taken along line 3-3 of FIG. 2;

FIG. 4 is a sectional view corresponding to FIG. 2 of a second embodiment.

FIG. 5 is a sectional view taken along line 5-5 in FIG. 4;

[Explanation of symbols]

12 ... reservoir body 17 ... liquid chamber 21 ... float 23 ... accommodating hole 24 ... reed switch 25 _1, 25 ₂ ... lead wire 26, 27 ... connector 30 _1, 30 ₂ lid member 36 ₁ , 36 ₂ support portion 40, 41 lead frame 40a, 41a connection terminal R reservoir

Claims (1)

(57) [Scope of request for utility model registration] 1. A reservoir body (12) made of a synthetic resin.
A liquid chamber formed in the reservoir body (12) below
A storage hole (23) partitioned from (17) is formed.
The lower limit is the float (21) stored in the liquid storage chamber (17).
The reed switch (24) that conducts when it reaches the position
The reed switch (24) is stored in the storage hole (23).
Both ends and a pair of lead wires (25₁, 25_Two) And mutually
Via a pair of connectable / separable connectors (26, 27)
And one of the two connectors (26, 27) (26)
Is fixed to the reservoir body (12).
In the alarm device, a lower part of the reservoir body (12)
Storage hole with open end on the side of reservoir body (12)
(23) and one connector (2
6) is provided integrally with the other end of the storage hole (23).
And a lid for detachably closing one end of the storage hole (23).
Members (30₁, 30_Two) Is stored in the storage hole (23).
Support (36₁, 36_Two) Are continuously provided, and the support portion
(36₁, 36 _Two) Supported reed switch (2)
4) The end of a pair of lead frames (40, 41) connected to
The end is connected to the connection terminal (40) in the one connector (26).
a, protruding as a, 41a)
Liquid level alarm device