JPH0517824Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Industrial Field of Application) The present invention relates to a power supply connection structure for on-vehicle electric appliances, and is used in, for example, car pots.

(Prior Art) In general, in a vehicle-mounted electric appliance, a fixing mechanism for fixing it on a base of a vehicle body and a connecting mechanism for connecting a power source provided on the vehicle body side are separately connected. That is, the electric appliance is connected to a power source by inserting the electrode terminal provided at the bottom of the electric appliance into the electrode insertion part provided on the top surface of the base, and the engaging recess provided at the bottom of the electric appliance is connected to the base. By engaging with the engaging convex portion provided on the upper surface of the base, the electric appliance can be fixed on the base with a so-called one-touch operation.

Furthermore, the wiring configurations of such electric appliances are mainly of two-wire type and three-wire type depending on the electric capacity. This wiring configuration is shown in FIGS. 8 and 9. The two-wire type shown in FIG. 8 consists of a power line a and a ground line b. The three-wire type shown in Fig. 9 is used when the electric capacity is large, and is composed of a power line c, a ground line d, and a control line e, and conducts the power line c through a relay f. configured to control.

(Problem to be solved by the invention) When using such an electric appliance, the user over-relies on the one-touch operation, and the engagement relationship between the engagement recess and the engagement protrusion, and the electrode terminal and electrode insertion It is sometimes used in a so-called temporary position without being inserted securely. At this time, if the electrodes of the control circuit are connected to each other and the electrodes of the power supply circuit that supplies other power are in an unstable connection state, the vibration of the vehicle body due to driving will make the state even more unstable, and the power supply circuit will become unstable. There was a problem that a large arc discharge occurred between the electrodes, damaging the electrodes.

Then, there was a problem in that even if such incorrect use was made several times, the device could no longer be used normally.

(Means for Solving the Problems) In order to solve the above problems, the power supply connection structure for the in-vehicle electric appliance according to the present invention includes a base fixed to the vehicle body and a removably installed base on the base. An electric appliance main body is provided with an engagement mechanism on the bottom surface of the electric appliance body and the top surface of the base, respectively, so that the electric appliance main body can be fixed on the base. A power supply circuit is formed by connecting the plurality of power supply terminals provided on the bottom of the electric appliance body with the plurality of power supply terminals provided in the device side connection part on the bottom of the electric appliance body while the electric appliance body is fixed. In the apparatus for supplying power to an electric appliance main body, the vehicle body side connection part is provided to be movable up and down with respect to the base, and the base and the electric appliance main body are engaged with each other while the electric appliance main body is placed on the base. In a temporary state in which the mechanism is not fully engaged, at least one of the plurality of power terminals
One power supply terminal is provided at such a length that it is not connected to the other power supply terminal, so that a power supply circuit to the electric load of the appliance body is not formed.

For example, as the above-mentioned power terminal, a bar-shaped terminal is provided on the side of the electrical appliance body, an insertion part into which the bar-shaped terminal is inserted is provided on the base side, and the terminal on the electrical appliance body side is provided with an insertion part into which the bar-shaped terminal is inserted. By forming the power supply terminal that forms the power supply circuit for the electric load to be shorter than the other terminals, the power supply terminal that forms the power supply circuit on the main body side of the electric appliance is connected to the board side in the above-mentioned temporary state. It can be provided at a position that is not connected to the power supply terminal.

Alternatively, the insertion part on the base side to which the power supply terminal forming the power supply circuit on the electric appliance body side is connected is formed shorter than the other insertion parts, so that the electric appliance body side in the temporarily placed state is The power supply terminal forming the power supply circuit can be provided at a position where it is not connected to the power supply terminal on the board side.

Alternatively, by keeping the length of the power terminals the same but changing the height position of the power supply terminals that form the power supply circuit, the power supply terminals that form the power supply circuit on the main body of the appliance in the above temporary position can be placed on the base side. It is also possible to provide the power supply terminal at a position where it is not connected to the power supply terminal.

On the other hand, the engagement mechanism includes, for example, an engagement protrusion provided on the base of the vehicle body and an engagement recess provided on the bottom surface of the electrical appliance that corresponds to the engagement protrusion. The engagement protrusion has a tapered surface that gradually widens from above to below approximately the upper half of the outer circumferential surface, and an engagement stepped portion is formed by recessing the lower part of the tapered surface. The mating recess has engaging protrusions formed on both sides of the recess, and these engaging protrusions are pushed outward while sliding from above to below on the tapered surface of the engaging protrusion. It is formed to pass through a tapered surface and be engaged and fixed with the engagement step, and the engagement protrusion of the engagement recess is sliding on the tapered surface of the engagement protrusion. In this temporarily placed state, the power supply connection structure prevents formation of a power supply circuit to the electric load on the appliance main body side.

(Function) The power terminal provided on the equipment side connection part on the bottom of the electrical appliance body and the plurality of power supply terminals provided on the vehicle body side connection part on the base board are connected to the bottom face of the electrical appliance body side and the top surface of the base board. In a temporarily placed state where the provided engagement mechanism is not fully engaged, at least one power terminal among the plurality of power terminals is not connected to the other power terminal, so in this temporarily placed state, the electric appliance body side A power supply circuit to the electrical load is not formed,
It has never happened to me that arc power is generated at the power supply terminals that form the power supply circuit.

(Example) Hereinafter, an example of the present invention will be described with reference to the drawings.

The structure of the power connection part of the electric appliance main body 1 according to the present invention is shown in FIGS. 4 and 5, and the electric appliance main body 1
The mounting mechanism (engaging mechanism) for mounting on the vehicle body is shown in FIGS. 6 and 7.

In FIGS. 6 and 7, the electrical appliance main body 1
The base 2 for fixing the
It is fixed by etc. An engagement protrusion 6 is provided in the center of the base 2 and supported by a support shaft 5. The engagement protrusion 6 has an insertion hole 6a in the center that penetrates in the vertical direction, and approximately the upper half of the outer peripheral surface has a tapered surface 6 that gradually expands from the top to the bottom.
b, and an engaging stepped portion 6c is formed by recessing the lower part of the tapered surface 6b in the axial direction. The support shaft 5 is inserted into the insertion hole 6a from above, and its lower end is fixed to the base plate 2 by tightening a nut 7. Further, a first spring body 8 is installed between the head 5a of the support shaft 5 and the bottom wall of the insertion hole 6a. That is, although the engaging protrusion 6 is normally pressed against the base 2 via the sound absorbing member 16 by the biasing force of the first spring body 8, the engaging protrusion 6 is pressed against the base 2 via the sound absorbing member 16 as appropriate. It is possible to move up and down against the urging force of.

On the other hand, there is a recess 9 in the center of the lower bottom surface of the electric appliance main body 1.
are formed on both sides of the recess 9, and engagement protrusions 10 and 1 that engage with the engagement step 6c of the engagement protrusion 6 are formed.
0 is housed in the case 11.
The engaging protrusion 10 is provided so as to protrude from the inner wall 11a of the case 11 toward the center, and the engagement protrusion 10 is connected to a back plate 10a of the outer wall 1 of the case 11.
1b, it is movable in the radial direction (in the left-right direction in FIG. 6), that is, retractable into the case 11.

Therefore, the electric appliance main body 1 having the above structure is connected to the base 2.
In the case of engaging and fixing the appliance above, first place the lower part of the electric appliance main body 1 on the base 2, and then place the engaging protrusion 10 provided at the lower part of the electric appliance main body 1 on the base 2, as shown in FIG. 2 is brought into contact with the tapered surface 6b of the engagement protrusion 6 attached to the engagement protrusion 6. In the case of temporary storage, the state is as shown in FIG. 7.

Next, in this state, by pushing the electric appliance main body 1 from above, the engaging protrusion 10 slides into contact with the tapered surface 6b and is expanded outward, that is, retracted into the case 11. When pushed further, the engagement protrusion 10 climbs over the lower edge of the tapered surface 6b and the engagement step 6c.
The electrical appliance main body 1 is fixed onto the base 2 as shown in FIG.

Further, in FIGS. 4 and 5 showing the structure of the power supply connection part of the electric appliance main body 1, 12 is an equipment side connection part provided on the bottom of the electric appliance main body 1, and 13 is a car body side connection part provided on the base 2. This is the connection part. The device side connection part 12 has two or three electrode terminals (power supply terminals) 20, depending on the wiring configuration used.
20... are provided. The vehicle body side connection part 13 is provided with electrode insertion parts (power supply terminals) 30, 30, . . . in a number corresponding to the electrode terminals 20. The vehicle body side connection part 13 is attached to the base 2 in a state where it is sandwiched between two supporting metal fittings 14 erected on the base 2.
It is engaged and held on top. That is, the bent tip portions 14a of the support fittings 14 bent into a hook shape are respectively fitted into the vertically elongated recesses 13a formed on both side walls of the vehicle body side connection portion 13.
is provided so as to be movable up and down with respect to the base plate 2 within the width 1 ₁ of the recessed portion 13a in the height direction.
This is caused by the vibration of the car while the car is running.
When the electric appliance main body 1 vibrates, the vehicle body side connection part 13 can follow the vibration of the electric appliance main body 1,
This is to prevent the power supply connection from coming off.

Here, FIG. 5 shows a state in which the electrical appliance main body 1 is temporarily placed on the base 2, and FIG. 4 shows a state in which the electrical appliance main body 1 is fixed on the base 2. Here, reference numeral 17 denotes a clamping member attached to both side surfaces of the vehicle body side connection part 13, which grips the device side connection part 12 from both sides when the electric appliance main body 1 is fixed. Further, 18 is a power cord.

Next, the structure of the power supply connection section when the electric appliance main body 1 is temporarily placed on the base plate 2, particularly the relationship between the electrode terminal 20 and the electrode insertion section 30, is shown in the schematic diagrams of FIGS. 1 to 3. Note that in FIGS. 1 to 3, in order to make it easier to understand the connection relationship between the electrode terminal 20 and the electrode insertion portion 30, the electrical appliance main body 1 is particularly shown.
The device connection portion 12 provided on the bottom of the vehicle and the vehicle body side connection portion 13 provided on the base are omitted from the illustration.

FIGS. 1 and 2 show the relationship between each electrode terminal and each electrode insertion portion of the electrical appliance main body, which has a three-wire wiring relationship.

FIG. 1 shows the length of the electrode terminal 22 of the control circuit located in the center among the electrode terminals 21, 22, 23 provided at the bottom of the electric appliance body 1, and the length of each electrode terminal of the power supply circuit located on both sides. Terminals 21, 2
3, and the electrode insertion portions 31, 32, 33 on the base plate 2 corresponding to the electrode terminals 21, 22, 23 are formed to have the same shape and height. That is, the electrode terminal 22 of the control circuit is connected to the electrode terminal 21 of the power supply circuit,
The length is ₁₂ shorter than 23. In this case, when the electrical appliance body 1 is temporarily placed on the base 2,
The electrode terminals 21 and 23 on both sides are in contact with the corresponding electrode insertion parts 31 and 33 on the substrate 2, respectively, and the center electrode terminal 22 is in a non-contact state with the corresponding electrode insertion part 32.

That is, to explain this state in relation to the conventional circuit shown in FIG. Line e
Since is in a disconnected state, relay f is turned off to keep power supply c open. Therefore, even if the power line c and the ground line d are connected, a power supply circuit for supplying power to the load is not formed, so that damage to the electrodes can be prevented. In addition, Fig. 2 shows the electrode terminals 24, 25, and 26 provided at the bottom of the electrical appliance body 1 with different lengths, with the electrode terminal 24 of the left power supply circuit being the longest, This is the shortest electrode terminal 25 of the circuit. That is, the length of the right electrode terminal 26 is shortened by 1 4 with respect to the left electrode terminal 24, and the length of the left electrode terminal 24 is shortened by 1 ₄ .
4, the central electrode terminal 25 is made shorter by a length of ₁₃ . In this case, when the electrical appliance main body 1 is temporarily placed on the base 2, only the left electrode terminal 24 contacts the corresponding electrode insertion part 34 on the base 2, or the electrode terminals 24 on both sides
4 and 26 come into contact with the corresponding electrode insertion parts 34 and 36 on the base 2, respectively,
At least the central electrode terminal 25 and the corresponding electrode insertion portion 35 are in a disconnected state. Therefore, it will be understood that the presence of electrodes can be similarly prevented in this case as well.

FIG. 3 shows the relationship between both electrode terminals 27 and 28 of the electric appliance main body 1 having a two-wire wiring configuration and both electrode insertion portions 37 and 38 provided on the base plate 2, and shows the relationship between the electrode terminals 27 and 28 of the electric appliance body 1 having a two-wire wiring configuration and the electrode insertion portions 37 and 38 provided on the base 2. The length of the terminal 28 is made shorter by 1 ₅ than the length of the other electrode terminal 27 of the power supply circuit. In this case, the electrical appliance body 1
is temporarily placed on the base 2, one electrode terminal 28 and the corresponding electrode insertion portion 3 on the base 2
8 is in a non-contact state.

With the above configuration, even if the electrical appliance main body 1 is temporarily placed on the base 2, no voltage is applied to the electrodes of the power supply circuit, so arc discharge will not occur even if the connection is unstable. First, damage to the electrodes can be prevented. However, in any of the above cases (Figs. 1 to 3), the short electrode terminals will not be securely inserted into the electrode insertion portion when the electrical appliance main body 1 is securely engaged and fixed on the base 2. It is natural that the length should be as long as possible.

In each of the above embodiments (Figures 1 to 3), the purpose is achieved by changing the length of the electrode terminal, but the length of the electrode terminal is the same, and the dimensions of the electrode insertion part are The purpose may be achieved by changing the height position of the electrode insertion portion, or by providing unevenness on the upper surface of the base 2 to change the height position where the electrode insertion portion is provided.

(Effects of the invention) As explained above, the power connection structure of the in-vehicle electric appliance of the present invention consists of a base fixed to the vehicle body and an electric appliance main body detachably installed on the base. The bottom surface of the electric appliance body and the top surface of the base plate are each provided with an engaging mechanism so that the electric appliance body can be fixed on the base plate, and a plurality of power terminals and electric A power supply circuit is formed by connecting the plurality of power terminals provided on the device side connection section on the bottom of the device body while the appliance body is placed and fixed, and supplies power from the base side to the appliance body. wherein the vehicle body side connection portion is provided to be movable up and down with respect to the base, and the engagement mechanism between the base and the electric appliance body does not fully engage while the electric appliance body is placed on the base. When the electric appliance is temporarily placed in a state where it is not connected, at least one of the plurality of power terminals is provided at a length that does not allow it to be connected to the other power terminal. Even if the appliance is left in a temporary state where the coupling mechanism is not fully engaged and vibration is applied to the appliance while the car is running, the power supply circuit to the electric load of the appliance will not be formed. This provides an excellent effect in that arc discharge does not occur in the power supply terminals forming this power supply circuit, and the power supply terminals are protected.

In addition, when the electric appliance main body and the base are engaged and ready for use, when a car is running and the electric appliance body vibrates due to the vibrations of the car, the connection part on the car body side will resist the vibration of the electric appliance main body. moves up and down to follow, so it can prevent the power terminal on the car body side connection part and the power terminal on the appliance body from coming loose due to vehicle body vibration, and it can ensure that the power terminal will not be damaged due to shocks caused by vibration. can be prevented.

[Brief explanation of drawings]

Figures 1 to 7 show one embodiment of the present invention, and Figures 1 to 3 show the electrode terminals with the device connection part on the bottom of the electrical appliance body and the car body side connection part on the base plate omitted. A diagram showing the relationship with the electrode insertion part,
Figures 4 and 5 are partially cutaway side views showing the power supply connection structure, Figures 6 and 7 are longitudinal sectional views showing the mounting structure on the vehicle body, Figure 8 is a two-wire wiring diagram, FIG. 9 is a three-wire wiring diagram. DESCRIPTION OF SYMBOLS 1...Electrical appliance main body, 2...Base, 3...Car body, 6...Engagement protrusion, 6c...Engagement step, 10
...Engaging protrusion, 12...Device side connection part, 13...
Vehicle body side connection portion, 20-28...electrode terminal (power terminal), 30-38...power insertion portion (power terminal).

Claims (1)

[Scope of Claim for Utility Model Registration] Consisting of a base fixed to the vehicle body and an electrical appliance main body detachably installed on the base, an engaging mechanism is provided on the bottom surface of the electrical appliance body and the top surface of the base, respectively. The electrical appliance is configured to be able to be fixed on the base, and has multiple power terminals provided on the vehicle body side connection section on the base board and multiple power supply terminals provided on the device side connection section on the bottom of the electrical appliance body. A power supply circuit is formed by connecting a terminal with the electric appliance main body mounted and fixed, and power is supplied from the base side to the electric appliance body, wherein the vehicle body side connection part is vertically movable with respect to the base plate. In a temporary state where the electric appliance main body is placed on the base but the engagement mechanism between the base and the electric appliance main body is not completely engaged, at least one of the plurality of power terminals A power supply connection structure for a vehicle-mounted electrical appliance, characterized in that one power terminal is provided at a length such that it is not connected to the other power terminal, and does not form a power supply circuit to the electrical load of the electrical appliance main body. .