JPH0716280Y2 - Waterproof structure of relay - Google Patents

Description

[Detailed description of the device] [The purpose of the device]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a waterproof structure of a relay used in, for example, electric components of automobiles, and more particularly to a waterproof structure against water droplets on the outside of the relay. (Prior Art) Conventionally, as a relay used for an electric component of an automobile, a coil, a movable contact piece, a fixed contact piece and the like are attached to a lower portion of a base on which a terminal of each of the above-mentioned components is attached. Is provided with a connector connecting portion, and a case covering each component is attached to the upper part of the base, the bottom surface of the case is positioned on the upper surface of the base, and the outer peripheral surface of the case is aligned with the outer peripheral surface of the base. There is something like this. In addition, when mounting the case, without using adhesive or packing in order to prevent an increase in the number of parts and the number of assembling steps, for example, the dimensional accuracy of the case and the base is strictly set, and the base side is attached. The case-side engaging portion is fitted and locked to the provided engaging portion so that the hermeticity inside the case is maintained. (Problems to be solved by the invention) However, in the above-mentioned conventional relay, in addition to high dimensional accuracy is required in order to ensure good airtightness inside the case as described above, it is also necessary to sprinkle the outside due to water sprinkling. If water drops adhere to the case, there is a risk that water will enter the case due to capillary action from the part where the base and case that are exposed to the outside are exposed to the heat. Causes the air inside the case to expand and be discharged to the outside of the case.After that, when the air inside the case is cooled by sprinkling water, etc., the outside air is sucked in, and this air is sucked in from the part where the base and case are attached. There is a problem that water droplets may be sucked into the case, and it has been a problem to solve such a problem. (Purpose of the Invention) The present invention was made by paying attention to the above-mentioned conventional problems. The dimensional accuracy of the base and the case can be relaxed more than before, and the capillary phenomenon and the inside of the case can be reduced. It is an object of the present invention to provide a waterproof structure for a relay that can reliably prevent water from entering the case due to temperature changes.

[Constitution of device]

(Means for Solving the Problems) A waterproof structure for a relay according to the present invention is a base formed in a rectangular shape, a frame fixed to the base, a bobbin held by the frame, and a bobbin wound around the bobbin. A coil, a movable contact piece assembled to the frame, a fixed contact piece and a power supply contact piece held by the base, and electrically coupled to the fixed contact piece or the power supply contact piece,
A case that includes a plurality of protruding terminals that are inserted through the base and held by the base, covers the frame, the bobbin, the coil, the movable contact piece, the fixed contact piece, and the power supply contact piece, and fits in the base. In the relay provided with, a protruding terminal cover is formed on the base so as to surround a plurality of protruding terminals held by the base and one of which is open, and the case has an outer periphery of the protruding terminal cover. Along with the above, the skirt portion reaching the lower end of the protruding terminal cover is continuously provided with a gap between the protruding terminal cover and the protruding terminal cover. As a means. (Effect of the Invention) The waterproof structure of the relay according to the present invention is such that the skirt portion connected to the case prevents the assembly portion of the base and the case and the protruding terminal cover of the base from being exposed to the outside, that is, the assembly portion. And the protruding terminal cover is protected from water droplets, and the positive gap provided between the skirt portion and the protruding terminal cover prevents water from penetrating into the case due to capillary action. To do. This prevents water droplets adhering to the outside from being sucked into the case even if the outside air is sucked due to changes in the temperature inside the case, and the dimensional accuracy of the base and case must be set so high. Also, the above waterproof function is ensured. (Embodiment) An embodiment of the present invention will be described below with reference to FIGS. That is, the relay 1 includes a rectangular base 2 and a first fixed contact piece 3 in a standing state and a second fixed contact piece 4 in a horizontal state on an upper portion of the rectangular base 2.
And a pair of power supply contact pieces (only one side is shown) 5, and an inverted L-shaped frame 8 for holding a bobbin 7 around which a coil 6 is wound is attached to the base 2. . The frame 8 has an armature 9 which extends below the bobbin 7 and is attracted by the excitation of the coil 6.
A leaf spring-shaped movable contact piece 10 provided with is attached. On the lower surface of the bobbin 7, there are provided a third fixed contact piece 11 having a downward contact 11a facing the upward contact 10a provided at the tip of the movable contact piece 10, and a pair of coil terminals (only one side is shown) 12. When the frame 8 is attached and the frame 8 is assembled to the base 2, the movable contact piece 10 contacts the second fixed contact piece 4, and the end portion of the third fixed contact piece 11 bent upward is first fixed. The coil terminal 12 comes into contact with the power supply contact piece 5 as well as the contact piece 3. Also, the first and second fixed contact pieces 3, 4 and the power supply contact piece 5 are
In each case, the portions that penetrate the base 2 and project downward are the circuit connecting terminals 3a and 4a that are projecting terminals and the power supply terminal 5a that is also a projecting terminal. The base 2 has a case on one side surface and a side surface on the opposite side.
Two engaging protrusions 2a for attaching 13 are formed, and a protruding terminal cover 2b that is opened downward in a state of surrounding the terminals 3a, 4a, 5a is integrally provided at a lower portion. There is.
On one side surface of the protruding terminal cover 2b, the direction of a connector (not shown) connected to the inside in a protruding state is clarified, and the connector is engaged so that the connector does not come off accidentally. The joint portion 2c is formed in a bulged state. The case 13 has a body portion 13a that covers the entire components such as the coil 6 assembled to the base 2 and the contact pieces 3 to 5, 10, 11 and the like, and the protruding terminal cover (including the fitting portion 2c). A skirt portion 13b extending along the outer periphery of 2b is continuously provided,
The skirt portion 13b has an extension length that reaches the lower end of the protruding terminal cover 2b when the case 13 is attached to the base 2. In addition, the case 13 is formed with a locking recess 13c corresponding to the engaging projection 2a of the base 2 inside. The case 13 can be easily attached by manual work or automatic assembly in a manner of covering the base 2, and the engaging concave portion 13c and the engaging convex portion 2 of the base 2 can be attached.
The engagement state is reliably maintained by engaging with a. At this time, a gap S is formed over the entire outer peripheral surface of the protruding terminal cover 2b and the inner peripheral surface of the skirt portion 13b, and the skirt portion 13 is formed.
The covering function of the protruding terminal cover 2b by b and the preventing function of the capillary phenomenon by the gap S constitute a waterproof structure against water droplets applied to the outside of the case. In the relay 1 having the above-mentioned configuration, a power source and a connector led from an appropriate circuit are connected to the inside of the protruding terminal cover 2b, and the connector 6 is energized from the power supply terminal 5a, so that the armature 9 is caused by its electromagnetic action. Of the movable contact piece 10 and the downward contact 11a of the third fixed contact piece 11
Are brought into contact with each other to electrically connect the circuit connected to the circuit connecting terminals 3a, 4a through the first and third fixed contact pieces 3, 11, the movable contact piece 10 and the second fixed contact piece 4. . The relay 1 has a skirt portion 13b for attaching the base 2 and the case 13 and a protruding terminal cover for the base 2.
2b is not exposed to the outside, that is, the assembly part and the protruding terminal cover 2b are not splashed with water, and the gap S prevents the moisture from entering the case due to a capillary phenomenon. , For example case
When water droplets adhere to the outside of 13, even if the temperature inside the case changes due to the heat generated by the operation of the relay 1 or the thermal influence from the outside, that is, the temperature decreases after the temperature rises,
There is no possibility that the water drops will be sucked into the case. In addition, the relay 1 does not require any adhesive or packing between the base 2 and the case 13, and the case 13 can be attached very easily and securely, and the dimensional accuracy of the base 2 and the case 13 can be improved. The above waterproof function can be sufficiently ensured without setting so high.

[Effect of device]

As described above, according to the waterproof structure of the relay device of the present invention, the skirt portion conceals the base-case assembly portion and the entire protruding terminal cover, so that water droplets adhere to the protruding terminal cover or water droplets from the outside. Can be surely prevented from entering the inside of the case, and the water is sucked due to the permeation into the inside of the water due to the capillary phenomenon in the gap between the skirt portion and the protruding terminal cover and the temperature change inside the case. Such a situation can be prevented, and the above waterproof function can be maintained without being influenced by the dimensional accuracy of the base and the case. Therefore, the dimensional accuracy can be relaxed according to the design allowable range and the like. it can.

[Brief description of drawings]

1 is a front view illustrating a case of a relay having a waterproof structure according to an embodiment of the present invention in section, and FIG. 2 is a side view illustrating a case of the relay illustrated in FIG. 1 in section. FIG. 3 is a plan view illustrating a case of the relay shown in FIG. DESCRIPTION OF SYMBOLS 1 ... Relay, 2 ... Base, 2b ... Protruding terminal cover, 3 ... 1st fixed contact piece, 4 ... 2nd fixed contact piece, 3a, 4a ... Circuit connection terminal (protruding terminal), 5 ... Power supply contact piece, 5a ... Power supply terminal (protruding terminal), 6 ... Coil, 7 ... Bobbin, 8 ... Frame, 10 ... Movable contact piece, 13 ... Case, 13b ... Skirt part, S
… Gap.

Claims (1)

[Scope of utility model registration request] 1. A base formed in a rectangular shape, a frame fixed to the base, a bobbin held by the frame, a coil wound on the bobbin, and a movable contact assembled to the frame. , A fixed contact piece and a power supply contact piece held by the base, and a plurality of protrusions electrically connected to the fixed contact piece or the power supply contact piece, inserted through the base, and held by the base. With a terminal,
A relay provided with a case which covers the frame, the bobbin, the coil, the movable contact piece, the fixed contact piece and the power supply contact piece, and which is fitted in the base, wherein the base includes:
Surrounding the plurality of protruding terminals held on the base,
In addition, a protruding terminal cover having an opening on one side is formed, and the case has a skirt portion that extends along the outer periphery of the protruding terminal cover and has a gap between the protruding terminal cover and the protruding terminal cover and reaches the lower end of the protruding terminal cover. Waterproof structure of the relay, which is characterized by being installed in series.