KR101621793B1 - Manufacturing method of oil sensor assembly for water level measurement - Google Patents

Manufacturing method of oil sensor assembly for water level measurement Download PDF

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Publication number
KR101621793B1
KR101621793B1 KR1020150099004A KR20150099004A KR101621793B1 KR 101621793 B1 KR101621793 B1 KR 101621793B1 KR 1020150099004 A KR1020150099004 A KR 1020150099004A KR 20150099004 A KR20150099004 A KR 20150099004A KR 101621793 B1 KR101621793 B1 KR 101621793B1
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KR
South Korea
Prior art keywords
terminal
lead switch
case
signal connection
oil
Prior art date
Application number
KR1020150099004A
Other languages
Korean (ko)
Inventor
이원호
Original Assignee
태광물산 주식회사
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Priority to KR1020150099004A priority Critical patent/KR101621793B1/en
Application granted granted Critical
Publication of KR101621793B1 publication Critical patent/KR101621793B1/en

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    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
    • G01F23/00—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm
    • G01F23/30—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm by floats
    • G01F23/64—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm by floats of the free float type without mechanical transmission elements
    • G01F23/72—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm by floats of the free float type without mechanical transmission elements using magnetically actuated indicating means
    • G01F23/74—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm by floats of the free float type without mechanical transmission elements using magnetically actuated indicating means for sensing changes in level only at discrete points
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60T—VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF; BRAKE CONTROL SYSTEMS OR PARTS THEREOF, IN GENERAL; ARRANGEMENT OF BRAKING ELEMENTS ON VEHICLES IN GENERAL; PORTABLE DEVICES FOR PREVENTING UNWANTED MOVEMENT OF VEHICLES; VEHICLE MODIFICATIONS TO FACILITATE COOLING OF BRAKES
    • B60T17/00—Component parts, details, or accessories of power brake systems not covered by groups B60T8/00, B60T13/00 or B60T15/00, or presenting other characteristic features
    • B60T17/18—Safety devices; Monitoring
    • B60T17/22—Devices for monitoring or checking brake systems; Signal devices
    • B60T17/225—Devices for monitoring or checking brake systems; Signal devices brake fluid level indicators
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H35/00—Switches operated by change of a physical condition
    • H01H35/24—Switches operated by change of fluid pressure, by fluid pressure waves, or by change of fluid flow

Abstract

The present invention relates to an oil sensor assembly for level measurement, which is installed in a brake oil or a washer liquid storage tank such as a master cylinder for a brake of an automobile to detect and measure the level of oil or washer fluid, ≪ / RTI >
The oil sensor assembly for level measurement according to the present invention is characterized in that a lead switch wire and a signal connection terminal of a glass vacuum tube having a lead switch built in a synthetic resin case in which a terminal sheet is installed are connected to a terminal sheet,
A first step of injection molding an oil sensor case having a cross-shaped terminal groove formed in a terminal sheet;
A second step of reinforcing the outside of the glass tube with a reinforcement member to prevent breakage by impact;
A glass vacuum tube reinforced through the second step and a signal connecting terminal are inserted into the case and the connecting portion of the lead switch wire and the signal connecting terminal is placed so as to cross the terminal groove of the terminal sheet to form a lead switch wire A third step of interference-tightening the connection;
A third step of putting the entire case in which the glass vacuum tube and the signal connection terminal are provided in the insert injection mold so as to seal the open top surface with a synthetic resin of a certain thickness for the purpose of insulation and breakage of the component, Lt; / RTI >

Description

Technical Field [0001] The present invention relates to an oil sensor assembly for water level measurement,

The present invention relates to an oil sensor assembly for level measurement, which is installed in a brake oil or a washer liquid storage tank such as a master cylinder for a brake of an automobile to detect and measure the level of oil or washer fluid, ≪ / RTI >

Generally, the automobile detects the level of liquid such as oil or washer fluid, and informs the driver of the warning by means of a warning light to prevent accidents and inform the operator of the timing of replenishment. For example, when the hydraulic brake brake pedal of an automobile is depressed, the force is transmitted to the booster and is transmitted to the master cylinder by a force twice as great as the force applied from the pedal. As a result, The oil in the oil tank is transmitted to the wheel cylinder of the vehicle, and the braking force is generated by the pressure of the fluid.

Therefore, it is very important to supply the master cylinder with the oil necessary for braking the vehicle because the brake oil is always filled with the required amount, so that when the oil is low, the driver is informed immediately when the oil is low.

Therefore, an oil sensing device is installed in the oil storage tank to sense the level of the oil, and when the oil level is low, a warning lamp is displayed to notify the driver.

This type of oil sensing device consists of a float that is built in an oil storage tank and has a magnet at the bottom and an oil sensor installed at the bottom of the tank. When the oil is filled in the oil storage tank, the float floats on the top surface of the oil. However, when the oil level decreases and the water level drops, the float moves to the bottom of the oil storage tank and the magnet and the reed switch of the oil detector are adjacent to each other, thereby energizing the reed switch by the magnetic force to turn on the oil shortage warning lamp.

In addition, the oil sensor of the oil sensing device is formed by inserting two signal connection terminals inside a case molded of a synthetic resin and connecting a wire of a reed switch which is sealed inside the tube, and filling and sealing the epoxy resin.

Therefore, in consideration of the breakage of the glass vacuum tube due to the impact in the insert molding process, the conventional oil sensor inserts only the signal connection terminal into the molding die of the synthetic resin case and performs insert injection molding. After the lead switch wire is soldered to the inserted signal connection terminal, the epoxy resin and urethane are filled in order to protect the glass tube from breakage due to the insulation of the solder part and external impact. The manufacturing process is complicated and the soldering work of the lead wire and the signal connection terminal has to be performed all at once.

In addition, it requires a process latency time for curing epoxy or urethane for insulation and glass tube breakage and sealing, so that productivity is not good, and the two-liquid injector facility for epoxy injection and the curing drying facility for fast curing are indispensable There were various disadvantages such as necessity.

SUMMARY OF THE INVENTION An object of the present invention is to provide a method of manufacturing an oil detector assembly for level measurement capable of insert molding with a glass vacuum tube in which a signal connection terminal and a lead switch wire are connected, I have to.

It is another object of the present invention to provide a method of manufacturing an oil sensor assembly for level measurement in which a synthetic resin case is insert-molded and insulated with a glass vacuum tube in which a signal connection terminal and a lead switch wire are connected to the inside of the case.

It is still another object of the present invention to provide a method for manufacturing a level measuring oil sensor assembly in which a signal connection terminal and a lead switch wire are connected and fixed without soldering.

In order to achieve the above object, the oil sensor assembly for level measurement of the present invention comprises a lead switch wire and a signal connection terminal of a glass tube having a lead switch built in a synthetic resin case, In the case of being connected to the terminal sheet,

A first step of injection molding an oil sensor case having a cross-shaped terminal groove formed in a terminal sheet;

A second step of reinforcing the outside of the glass tube with a reinforcement member to prevent breakage by impact;

A glass vacuum tube reinforced through the second step and a signal connecting terminal are inserted into the case and the connecting portion of the lead switch wire and the signal connecting terminal is placed so as to cross the terminal groove of the terminal sheet to form a lead switch wire A third step of interference-tightening the connection;

A fourth step of inserting the entire case provided with the glass vacuum tube and the signal connection terminal through the third step into an insert injection mold to seal the opened upper surface with a synthetic resin having a predetermined thickness to prevent insulation and breakage of the component, And a method of manufacturing an oil sensor assembly.

The reinforcing member is made of urethane or silicone which surrounds the glass tube, or a case in which the reinforcing member is formed in a heavier shape.

The groove formed in the connecting portion of the signal connecting terminal is formed in a cross shape having a smaller diameter as it goes inward from the inlet for tight fitting of the lead switch wire.

As described above, according to the present invention, a glass vacuum tube having a built-in reed switch is reinforced by a reinforcing member so as not to be damaged by the external impact of the inserter, and the lead switch wire and the signal connection terminal are connected in a forced- Since the whole part is insulated and sealed as a synthetic resin in the insert injection mold, the manufacturing process is simplified and productivity is improved, and the troubles of soldering and the connection failure are solved as in the prior art. Conventional urethane- There is no need to construct a curing drying facility, and the cost of equipment is greatly reduced.

1 is an exploded perspective view of the present invention
Fig. 2 is a perspective view of a partial incision in a state in which a glass tube is reinforced by a reinforcing member; Fig.
3 is an exemplary view showing a terminal sheet to which a lead switch wire and a signal connection terminal are connected
4 is a plan view showing a state in which a lead switch and a signal connection terminal are connected to the inside of the case
5 is a front sectional view of Fig. 3
Fig. 6 is a cross-sectional view of the case in which the case is insert-injected and sealed as a synthetic resin
7 is a sectional view of the connection state of the lead switch wire and the signal connection terminal

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the present invention will be described in detail with reference to embodiments shown in the accompanying drawings.

It is to be understood that both the foregoing general description and the following detailed description of the present invention are exemplary and explanatory and are intended to be illustrative of the present invention and are not to be construed as limiting the present invention. It will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined by the appended claims.

The oil sensor assembly 100 for level measurement of the present invention is characterized in that the leads 1 of the glass tube 4 having the lead switch 3 built in the synthetic resin case 2 in which the terminal sheets 1 and 1 ' In the case where the switch wire 3 'and the signal connection terminals 5 and 5' are connected to the terminal sheets 1 and 1 '

A first step of injection molding the oil sensor case 2 in which cross-shaped terminal grooves 6 and 6 'are formed in the terminal sheets 1 and 1';

A second step of reinforcing the outside of the glass tube (4) with the reed switch (3) by the reinforcing member (7) to prevent breakage by impact;

The glass tube 4 and the signal connection terminals 5 and 5 'reinforced through the second step are inserted into the case 2 and the lead switch wire 3' and the signal connection terminals 5 and 5 ' The lead switch wire 3 'is inserted into the groove 9 formed in the connecting portion 8 by placing the connecting portion 8 of the terminal sheet 1 and 1' so as to cross the terminal grooves 6 and 6 ' A third step of making interference with each other;

The entirety of the case 2 provided with the glass tube 4 and the signal connection terminals 5 and 5 'through the third step is inserted into the insert injection mold so that the opened upper surface is protected with a predetermined thickness And a fourth step of sealing with a synthetic resin (10).

The reinforcing member 7 is made of urethane or silicone surrounding the glass tube 4, or a protective case formed with a hollow portion.

The groove 9 formed in the connection portion 8 of the signal connection terminals 5 and 5 'is formed in a crosshole shape having a smaller diameter as it goes inward from the inlet so that the lead switch wire 3' .

The case 2, which forms the oil sensor assembly 100, is formed by injection-molded synthetic resin.

The terminal sheets 1 and 1 'are integrally formed in the case 2 and the lead switch wire 3' and the signal connecting terminals 5 and 5 'are integrally formed on the terminal sheets 1 and 1' And the terminal sheets 1 and 1 'are connected to the lead switch wire 3' and the signal connection terminal 5 ', respectively, ) 5 'are connected to each other.

The glass tube 4 with the lead switch 3 installed inside the case 2 is reinforced as the reinforcing member 7 to prevent breakage by impact.

The reinforcing member 7 is molded as urethane or silicone to surround the glass tube 4 and has a thickness enough to withstand the impact of the glass tube 4. In addition, the glass tube 4 can withstand impact It is also possible to accommodate and buffer the inside of the protective case formed with a hollow portion made of a material.

The glass tube 4 with the lead switch 3 reinforced by the reinforcing member 7 is protected from external impact and is inserted into the case 2 to insulate and seal the same as the synthetic resin 10 It is not damaged during injection molding.

The glass tube 4 reinforced as the reinforcing member 7 is installed inside the case 2 and connected to the signal connection terminals 5 and 5 ' 1 'are provided on the terminal sheets 1 and 1', and the connection portions of the lead switch wire 3 'and the signal connection terminals 5 and 5' are connected to the terminal sheets 1 and 1 ' Since the terminal grooves 6 and 6 'on which the terminals 2 and 8 are mounted are formed in a cross shape, the wires 3' of the lead wires 3 exposed to both sides are connected to the terminal sheet 1 inside the case 2, And the terminal connecting portions 8 of the signal connecting terminals 5 and 5 'are connected to the terminal grooves 6 and 6' formed in the terminal groove 1 'so as to intersect with the lead switch wire 3' 6 and 6 ', the reed switch 3 and the signal connection terminals 5 and 5' are connected to each other.

At this time, the lead switch wire 3 'is in tight contact with the groove 9 formed in the connecting portion 8 of the signal connecting terminals 5 and 5'. As the groove 9 goes inward from the inlet, (5 ') of the signal connection terminals 5 and 5' in a state where the connection portion 8 of the signal connection terminals 5 and 5 'and the lead switch wire 3' are crossed at the time of assembly, The reed switch wire 3 'and the signal connection terminals 5 and 5' are tightly connected when the connection portion 8 is pressed from above.

When the third step is completed, the entire case 2 to which the lead switch 3 and the signal connecting terminals 5 and 5 'are connected is inserted into the insert injection mold, and the upper surface opened for insulation sealing of the switch is set at a predetermined thickness The glass tube 4 is surrounded by the reinforcing member 7 such as urethane or silicone even if an impact is applied during the injection molding of the insert. So that the entire part can be manufactured by insert injection molding.

As described above, since the glass vacuum tube 4 is reinforced by the reinforcing member 7 to enable insert molding, the epoxy injection process, the curing process, and the like, which are used for the insulation sealing, are not required and the manufacturing process is simplified and simplified There is a great effect that the facility cost is reduced and the productivity is increased because there is no need to wait for the curing time as in the prior art.

1: terminal sheet 2: case 3: lead switch 3: lead switch wire 4: glass tube 5, 5 ': signal connection terminal 6, 6': terminal groove 7: reinforcing member 8: : Synthetic resin material

Claims (4)

The lead switch wire 3 'and the signal connection terminal 5 of the glass tube 4 having the lead switch 3 built in the synthetic resin material case 2 in which the terminal sheets 1 and 1' (5 ') are connected to the terminal sheets (1) and (1'),
A first step of injection molding the oil sensor case 2 in which the terminal grooves 6 and 6 'are formed in the terminal sheets 1 and 1';
A second step of reinforcing the outside of the glass tube (4) with the reed switch (3) by the reinforcing member (7) to prevent breakage by impact;
The glass tube 4 and the signal connection terminals 5 and 5 'reinforced through the second step are inserted into the case 2 and the lead switch wire 3' and the signal connection terminals 5 and 5 ' The lead switch wire 3 'is inserted into the groove 9 formed in the connecting portion 8 by placing the connecting portion 8 of the terminal sheet 1 and 1' so as to cross the terminal grooves 6 and 6 ' A third step of making interference with each other;
The entirety of the case 2 provided with the glass tube 4 and the signal connection terminals 5 and 5 'through the third step is inserted into the insert injection mold so that the opened upper surface is protected with a predetermined thickness And a fourth step of sealing with a synthetic resin (10). The connector according to claim 1, wherein the terminal grooves 6 and 6 'of the terminal sheets 1 and 1' are connected to the lead switch wire 3 ' A method for fabricating an oil sensor assembly for level measurement with a cross-shaped seating. The method according to claim 1, wherein the reinforcing member (7) is made of any one of urethane, silicone, or a protective case formed around the glass tube (4). 2. The connector according to claim 1, wherein the groove (9) formed in the connection part (8) of the signal connection terminal (5) (5 ') has a smaller diameter as it goes inward from the inlet so that the lead switch wire (3' Wherein the lid is formed in a shape of a crosswind.
KR1020150099004A 2015-07-13 2015-07-13 Manufacturing method of oil sensor assembly for water level measurement KR101621793B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
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Application Number Priority Date Filing Date Title
KR1020150099004A KR101621793B1 (en) 2015-07-13 2015-07-13 Manufacturing method of oil sensor assembly for water level measurement

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20160098117A (en) * 2016-07-29 2016-08-18 주식회사 한중엔시에스 Automotive brake system vacuum switch structure

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2001030893A (en) 1999-07-19 2001-02-06 Nissin Kogyo Co Ltd Reed switch unit

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2001030893A (en) 1999-07-19 2001-02-06 Nissin Kogyo Co Ltd Reed switch unit

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20160098117A (en) * 2016-07-29 2016-08-18 주식회사 한중엔시에스 Automotive brake system vacuum switch structure
KR101682873B1 (en) * 2016-07-29 2016-12-06 주식회사 한중엔시에스 Automotive brake system vacuum switch structure
CN107665793A (en) * 2016-07-29 2018-02-06 韩中Ncs株式会社 Brake device for car vacuum switch structure
CN107665793B (en) * 2016-07-29 2019-05-31 韩中Ncs株式会社 Brake device for car vacuum switch structure

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