JPH02123288A - Protective device for electrical parts - Google Patents

Abstract

PURPOSE:To fix a lead wire and prevent penetration of moisture or the like from its extension part into a terminal cover by providing a protruding member at a gasket to face a takeout part of the terminal cover for holding the lead wire, and providing the protruding member on a flat surface of a sealed container. CONSTITUTION:A protruding member 13 of a gasket 4 is provided on a flat part of a sealed container 1 for holding a lead wire 12 by combination with a protrusion 14 of a takeout part 11, so the lead wire 12 which is pressed by the protrusion 14 contacts by the surface. As a result, gaps are less likely to be produced at the holding at between the takeout part 11 and the protruding member 13, so penetration of moisture is prevented. Because the lead wire is held by contact by the surface by the takeout part 11 and the protruding member 13, it is less likely to move by an external tensile stress, and if the protruding member 13 is long, the lead wire 12 can be kept without contacting the sealed container 1.

Description

[Detailed description of the invention] (b) Industrial application fields The present invention relates to an improvement in a protection device for electrical components.

(b) Conventional technology A conventional protection device for electrical components is, for example,
The structure is as shown in the No. 91 publication. Here, a conventional example will be explained with reference to this publication. In FIGS. 5 to 7, 50 is a hermetic container forming the outer cover of the hermetic compressor; 51 is a rod protruding from the upper part of the outer surface of the hermetic container and provided mainly for supporting the compressor; 5
Reference numeral 2 denotes a sealed terminal which is partially embedded in the sealed container 50 in the vicinity of this rod and has the other part protruded to the outside of the sealed container 50, and this sealed terminal is provided with a plurality of terminal pins 53 protruding from the sealed terminal. There is. Reference numeral 54 denotes a terminal cover provided with a terminal chamber 55 for housing the sealed terminal 52, and this terminal cover is made of an electrically insulating and elastic material such as rubber. 56 is a hole formed in the terminal cover 54 and penetrating in the vertical direction, and the inner diameter of the upper end of this hole is the same as that of the rod 5.
It has been formed slightly smaller than the outer diameter of 1. A protector chamber 57 is integrally formed with the terminal cover 54 and houses the overload relay 58, and a flange portion 5 of the overload relay 58 is provided at the lower end of the protector chamber.
A stepped portion 60 is provided which is brought into contact with the overload relay 9 and presses down the overload relay so as to bring it into close contact with the outer surface of the closed container 50. 61 is a drawer 1 for pulling out the lead wire 62 connected to the terminal of the overload relay 58, and 63 is a drawer opening for pulling out the lead wire 64 connected to the terminal pin 53 of the sealed terminal 52. These outlet openings are provided in two places. ing. The terminal cover 54 has an outlet 63 and an airtight container 50.
A slit 65 is provided between the contact surface and the contact surface.

In the protection device for electrical components with this structure, the terminal cover 5
This terminal cover is fixed by simply fitting the hole 56 of No. 4 into the rod 51, and the overload relay 58 is connected to the closed container 5 by the stepped portion 60 of the terminal cover 54.
0, and is designed to prevent moisture from entering the terminal cover 54.

(c) Problems to be Solved by the Invention However, the terminal cover 54 is provided with a terminal chamber 55 for housing the sealed terminal 52 and a protector chamber 57 for housing the overload relay 58, respectively. Since the lead wires 62 and 64 are simply drawn out from the communicating outlet 61 and 63, when external tensile stress is applied, the connection with the electrical components becomes easy to disconnect.
There were problems such as moisture intrusion from the outlet ports 61 and 63.

This invention solves the above problem, and aims to fix the lead wire between the gas wat and the terminal cover, and to prevent moisture etc. from entering the terminal cover from the lead wire extraction part. That is.

(d) Means for Solving the Problems This invention provides a terminal cover for storing electrical components, which is attached to the outer wall of the compressor via a gasket, and a take-out portion for drawing out lead wires connected to the electrical components. In addition, the gasket is provided with a protruding piece that faces the take-out portion of the terminal cover and clamps the lead wire, and this protruding piece is provided on the flat surface of the airtight container.

(f) Function With this invention configured as described above, the lead wire is fixed by being pressed by the take-out portion of the terminal cover against the protruding piece of the gasket provided on the flat surface of the airtight container. The terminal cover is in surface contact with the gasket to prevent moisture from entering the terminal cover from the terminal cover take-out part.

(f) Examples The present invention will be explained below based on the examples shown in FIGS. 1 to 4.

Reference numeral 1 denotes a cylindrical sealed container that houses an electric compressor main body (not shown) inside, and a flat surface 2 is provided on the earthen wall of this container. 3 is a protection device attached to the flat surface 2 of the sealed container 1, and this protection device includes a rubber gasket 4 installed on the flat surface 2 of the sealed container 1, and a terminal cover 5 placed on the gasket. and a fastening fitting 6 for fixing the terminal cover to the airtight container 1 while pressing the terminal cover against the gasket 4. A sealed terminal 7 and an overload relay 8 are housed in the terminal cover 5 and are attached to the sealed container 1 by penetrating the flat surface 2 thereof. A plurality of terminal pins 9 are attached to the sealed terminal 7.
is provided prominently. Further, the overload relay 8 is provided with a plurality of terminals 10.

Reference numeral 11 denotes a take-out part provided on the terminal cover 5, and this take-out part is adapted to draw out the lead wires 12 connected to the terminal pin 9 of the sealed terminal 7 and the terminal 10 of the overload relay 8, respectively, to the outside of the terminal cover 5. ing. Reference numeral 13 denotes a protruding piece provided on the gasket 4, and this protruding piece faces the take-out portion 11 of the terminal cover 5 and is adapted to clamp the lead wire 12. Moreover, the protruding piece 13
is provided on the flat surface 2 of the closed container 1. Removal section 11
is provided with a plurality of protrusions 14 for pressing the lead wire 12 against the protruding piece 13 of the gasket 4. The tips of the plurality of protrusions are formed at the same height.

In the electrical component protection device configured as described above, the assembly order of the protection device 3 will be described. First, the gasket 4 to which the overload relay 8 is attached is attached to the flat surface 2 of the closed container 1. Then, connect the lead wires 12 to the terminal pin 9 of the sealed terminal 7 and the terminal 10 of the overload relay 8, collect the lead wires, align them with the protruding pieces 13 of the gasket 4, and fix them with the take-out part 11 of the terminal cover 5. Cover the terminal cover as shown below.
Fix the terminal cover 5 with the tightening fittings 6, and attach the protective device 3.
is assembled.

The protruding piece 13 of the gasket 4 that holds the node wire 12 between the protrusion 14 of the extraction part 11 is provided on the flat surface 2 of the closed container 1, so that the lead wire 12 pressed by the protrusion 14 is
I try to have face-to-face contact. Therefore, the lead wire 12
The holding portion between the take-out portion 11 and the protruding piece 13 is designed to prevent the formation of a gap, thereby preventing moisture from entering. Further, the lead wire 12 is connected to the take-out portion 11 and the protruding piece 1.
By being held in surface contact with 3, it is difficult to work with tensile stress from the outside. Moreover, the protruding piece 13
By making the lead wire 12 long, the lead wire 12 is prevented from coming into contact with the closed container 1.

(G) Effects of the Invention The electrical component protection device of the present invention attaches a terminal cover for storing electrical components to the outer wall of the compressor via a gasket, and protects the terminal cover from electricity.

A take-out part for pulling out the lead wire connected to the manufactured part is provided, a protruding piece for holding the lead wire is provided on the gasket opposite to the take-out part of the terminal cover, and this protruding piece is provided on the flat surface of the airtight container. Therefore, by providing the protruding piece of the gasket that holds the lead wire opposite to the take-out part on a flat surface, the lead wire can be brought into surface contact with the protruding piece of the gasket at the take-out part of the terminal cover. This prevents moisture from entering the terminal cover from the lead wire clamping portion. Moreover, since the node wires are held in surface contact, they can be prevented from shifting due to external tensile stress.

[Brief explanation of drawings]

Fig. 1 is a plan view showing an embodiment of the present invention in which a protection device is attached to a compressor; A-A in the diagram
4 is an enlarged sectional view of the main part showing how the lead wire is attached, FIG. 5 is a perspective view of a conventional compressor with a protection device attached, and FIG. 6 is a protection device on the compressor as well. FIG. 7 is a sectional view taken along the line B--B in FIG. 6. 1... Sealed container, 2... Flat surface, 3... Protective device, 4... Gasket, 5... Terminal cover 7... Sealed terminal, 8 River overload relay 11... Removal Part 12...
- Lead wire, 13... protruding piece.

Claims (1)

[Claims] 1. In a protection device in which a terminal cover containing electrical components is attached to the outer wall of the compressor via a gasket, the terminal cover is provided with a take-out portion for pulling out a lead wire connected to the electrical component, and 1. A protection device for electrical components, characterized in that a protruding piece for holding a lead wire is provided opposite to a take-out portion of a terminal cover, and the protruding piece is provided on a flat surface of a sealed container.