JP2010013985A - Terminal protective member for electric compressor - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a terminal protective member for an electric compressor preventing insulation failure and current carrying failure by suppressing intrusion of water from outside and facilitating work to bypass a cord group drawn out of a cord drawing hole along a tip part of a cord receiving piece and receiving and locking the cord group in a recessed part at an upper edge. <P>SOLUTION: In the electric compressor, a terminal 3 mounted to a top part of a closed container 12 is protected by the protective member comprising a terminal fence 1 and a terminal cover 2 fitted to the terminal fence 1. The terminal cover 2 has the cord drawing hole 9 formed on the lateral face and the cord receiving piece 11 formed opposing to the cord drawing hole 9, and the cord receiving piece 11 is formed to be shifted downwardly from the lower edge of the terminal cover 2. The tip part 11b of the cord receiving piece 11 is formed to have a bend shape, and a bend part is also formed on a lower end part of a hood-shaped projection 15 formed on the peripheral edge of the cord drawing hole 9. This structure facilitates bypassing of the cord group 20 along the tip part 11b. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to an electric compressor, and more particularly to an improvement in a protective member for protecting a terminal mounted on an airtight container.

  In general, an electric compressor has an electric mechanism portion and a compression mechanism portion operated by the electric mechanism portion housed in a sealed container, and a terminal is attached to the airtight container, and the electric mechanism portion is connected via the terminal. To actuate the compression mechanism. A gas (usually a refrigerant) is introduced into the compression mechanism by the introduction pipe and compressed, and the high-pressure gas discharged into the sealed container is taken out to the outside through the discharge pipe.

  In the terminal, since a cord terminal from a power source is connected to an external electrode located outside the sealed container, the electrical connection portion is exposed to the outside. When the electrical connection portion is exposed to the outside as described above, dust or dirt may adhere or moisture may adhere to cause a decrease in insulation, poor conduction, or the like.

In order to cope with such a situation, techniques for protecting an external electrical connection portion of a conventional terminal are disclosed in Patent Documents 1 and 2 and the like.
JP2008-75547 JP2006-220,000

  As shown in FIG. 6, when the terminal 3 is protected by a protective member comprising a steel terminal fence 1 and a synthetic resin terminal cover 2 that is elastically fitted to the terminal fence 1, The side wall portion 2a of the terminal cover 2 is fitted inside the plurality of receiving pieces 4, 5 and 6 formed by being raised on the side portion, and the locking piece 7 provided opposite to the end portion of the terminal fence 1; The terminal cover 2 is attached by fitting and locking projections 2b and 2c formed on the lower portion of the end wall of the terminal cover 2 into the engagement holes 7a and 8a of the eight.

  As shown in FIG. 7, the terminal cover 2 in the conventional terminal protection member secures a preferable position and size of the cord lead-out hole 9 so that the upper edge of the cord lead-out hole 9 is considerably located on the side surface of the terminal cover 2. Must be located in a high area. For this reason, the shape of the cord lead-out hole 9 becomes large as shown in FIG. 6, and water may easily enter from the outside, resulting in poor insulation or poor conduction.

  A plurality (3 to 5) of cord groups 20 drawn out from the cord lead-out hole 9 are detoured upward from below along the tip end portion of the cord receiving piece 11 of the terminal cover 2 to be recessed at the upper edge. However, since the distance between the cord receiving piece 11 and the side edge of the cord lead-out hole 9 is narrow as shown in FIG. 8 and the tip of the cord receiving piece 11 is square as shown in FIG. The work of diverting 20 is difficult. Further, a projection 9a is provided along the peripheral edge of the cord lead-out hole 9, but the lower end portion of the projection 9a obstructs the detouring operation of the cord group 20.

  The present invention is made to solve such problems in the prior art, and by reducing the shape of the cord lead hole of the terminal cover, it suppresses the intrusion of water from the outside to prevent poor insulation, poor conduction, etc. It is another object of the present invention to provide a terminal protective member for an electric compressor that facilitates the work of detouring the cord group drawn out from the cord drawing hole along the tip of the cord receiving piece and receiving it in the recess. And

  As a means for achieving the above object, claim 1 of the present invention is characterized in that the electric mechanism is mounted on the top of a lid of a sealed container that houses the electric mechanism and a compression mechanism operated by the electric mechanism. In the electric compressor in which a terminal for energizing the part is mounted and a protective member composed of a terminal fence and a terminal cover fitted to the terminal fence is attached to protect the external electrical connection part of the terminal, The terminal cover includes a cord lead hole formed in a side surface and a cord receiving piece formed to face the cord lead hole, and the cord receiving piece is formed by being shifted downward from a lower end edge of the terminal cover. It features a terminal protection member for an electric compressor.

  According to a second aspect of the present invention, in the terminal protection member of the electric compressor according to the first aspect, the cord receiving piece is provided with a concave portion for receiving the cord at an upper end edge, and is extended from the cord drawing hole. The distal end portion is formed in a curved shape so that the cord can be easily fitted into the recess by bypassing the distal end portion of the cord receiving piece.

  According to a third aspect of the present invention, in the terminal protection member of the electric compressor according to the second aspect, the cord lead-out hole is provided with an eave-like projection along a peripheral edge portion, and the cord receiving piece of the projection is provided. A bending portion for facilitating the detouring of the cord is formed at a lower end portion facing the tip end side of the cord.

  According to the first aspect of the invention, in the electric compressor in which a protective member including a terminal fence and a terminal cover that is elastically fitted to the terminal fence is attached to the top of the lid of the sealed container, Since the cord receiving piece to be formed is shifted downward from the lower end edge of the terminal cover, the upper edge of the cord lead-out hole facing the cord receiving piece can be positioned in a lower region than in the prior art. Thereby, the shape of the code | cord | chord extraction hole of a terminal cover can be made smaller than before, the penetration | invasion of the water from the outside can be suppressed, and an insulation failure, a conduction failure, etc. can be prevented.

  According to the second aspect of the present invention, since the tip end portion of the cord receiving piece is formed in a curved shape, the cord group extended from the cord drawing hole is moved downward along the tip end portion of the cord receiving piece. It becomes easy to carry out the operation | work which detours upwards from the upper part and fits into the recessed part of an upper end edge.

  According to the third aspect of the present invention, the cord lead-out hole is provided with an eaves-like projection along the peripheral edge portion, and a lower end portion of the projection facing the tip portion side of the cord receiving piece, Since the bending portion for facilitating the detouring of the cord is formed, the work of diverting the cord group taken out from the cord drawing hole upward from below along the tip portion of the cord receiving piece is further facilitated. Become.

Next, embodiments of the present invention will be described with reference to the accompanying drawings.
FIG. 1 is a schematic exploded perspective view showing an embodiment of a terminal protection member of an electric compressor according to the present invention. Components that are substantially the same as those in the conventional example shown in FIG.

  In FIG. 1, reference numeral 1 denotes a steel plate terminal fence, which is attached to the lid 12 a by penetrating and fixing the terminal 3 attached to the top of the lid 12 a of the sealed container 12. The terminal fence 1 is provided with the receiving pieces 4 and 5 raised on the side portion of the substrate 1a, and the small receiving piece 6 is provided on the side portion on the receiving piece 4 side. Locking pieces 7 and 8 are set up at the part and are opposed to each other, and engaging holes 7a and 8a are formed in these locking pieces 7 and 8, respectively.

  Reference numeral 2 denotes a synthetic resin terminal cover, which has a substantially box shape that opens downward, and is dropped into the terminal fence 1 to detachably fit to form a protective member 16 (FIG. 2). The protective member 16 covers and protects the external electrical connection portion of the terminal 3.

  The terminal cover 2 has a side wall portion 2a fitted and locked to the inside of the receiving piece 4 of the terminal fence 1, and a protruding portion 13 is formed on the outside, and an inclined surface 14 is formed below the protruding portion 13. It is formed in the direction. In this case, the protruding portion 13 is also formed on an inclined surface that is inclined inward as it goes downward. Similarly, the protruding portion 13 and the inclined surface 14 are formed on the side wall portion fitted and locked inside the receiving pieces 5 and 6.

  Protrusions 2b and 2c that engage with the engaging holes 7a and 8a of the locking pieces 7 and 8 are provided on the outer lower portions of the opposing end walls of the terminal cover 2, respectively. Further, a cord lead-out hole 9 is provided on one side of the terminal cover 2, and a cord receiving piece 11 is provided so as to protrude in a substantially L shape so as to face the cord lead-out hole 9. A recess 11a is formed at the edge.

  In this case, as shown in FIGS. 2 and 3, the cord receiving piece 11 is shifted downward from the upper end edge of the terminal cover 2 and formed at a position lower than the conventional one. The height is lower than in the prior art and the whole is downsized, and the outer peripheral edge is formed in a curved shape. Further, the recess 11a of the cord receiving piece 11 has a wider width than before, and the width of the cord lead-out hole 9 is also wider than before.

  As described above, since the cord receiving piece 11 is formed so as to be shifted downward as compared with the conventional case, the cord pull-out hole 9 can be positioned in a lower region than the conventional case (see FIG. 2). ). That is, the upper edge of the cord lead-out hole 9 facing the cord receiving piece 11 can be set at a lower position than the conventional one on the side surface of the terminal cover 2. Thereby, the shape of the code | cord | chord drawer | drawing-out hole 9 can be formed smaller than before, the penetration | invasion of the water from the outside can be suppressed, and an insulation failure, a conduction failure, etc. can be prevented.

  Further, an eave-like projection 15 is provided on the peripheral edge of the cord lead-out hole 9, and the lower end of the projection 15 facing the tip portion 11b side of the cord receiving piece 11 as shown in FIGS. A bent portion 15a for facilitating detouring of the cord group 20 is formed in the portion by a notch.

  The eaves-like projection 15 is formed with a projection amount far larger than that of the conventional projection 9a shown in FIG. 6, so that it is possible to reliably prevent water from entering the cord lead-out hole 9 from above or from the side. it can.

  Thus, in order to form the eaves-like protrusion 15 large, the protruding amount of the cord receiving piece 11 is also set large. As a result, the distance between the cord lead-out hole 9 and the cord receiving piece 11 becomes larger than before, and the space for detouring the cord group 20 increases, making it easier to perform detouring work. Since the lid 12a of the hermetic container 12 has a stepped two-stage structure, a relatively large space S is formed below the eaves-like projection 15 as shown in FIG. It is convenient for work, and no trouble occurs even if the position of the cord receiving piece 11 is shifted downward as described above.

  FIG. 2 is a schematic side view showing a state in which the protection member 16 is formed by fitting the terminal cover 2 to the terminal fence 1. As shown in FIG. 1, to the external electrode 3a formed of a conductive pin in the terminal 3, a connector 17 attached to the tip of a plurality (three) of cords 10 from the power source side is connected, and a terminal cover 2, a relay component 18 is accommodated.

  After the terminal cover 2 is fitted, the cords 10 and the cords 19 that are connected to the relay component 18 are collectively bundled together, and the cords drawn out from the cord lead-out holes 9 are bundled together. The group 20 is received by the concave portion 11a at the upper edge while bypassing the tip portion 11b of the cord receiving piece 11. This is to avoid contact between the cord group 20 and the lid 12a. When the electric compressor is used, the airtight container 12 becomes high temperature, so that the cord group 20 needs to be protected from the high heat of the lid 12a.

  4 and 5 show a state in which the cord group 20 drawn to the outside from the cord drawing hole 9 is received by the concave portion 11a at the upper edge while bypassing the tip portion 11b of the cord receiving piece 11. . In this case, the distal end portion 11b of the cord receiving piece 11 is low in height and downsized as a whole as described above, and the outer peripheral edge is formed in a curved shape. Therefore, as shown in FIG. The work of diverting 20 from the lower side to the upper side along the tip portion 11b is easier than before.

  Further, as shown in FIG. 5, a curved portion 15a for facilitating the detouring of the cord group 20 is cut out at the lower end portion of the eave-like projection 15 facing the tip portion 11b side of the cord receiving piece 11. Further, the distance between the cord lead-out hole 9 and the cord receiving piece 11 is larger than the conventional one, and the space for detouring the cord group 20 is increased. It can be done very easily.

  The present invention can be widely applied as a terminal protection member of an electric compressor.

It is a general | schematic disassembled perspective view which shows embodiment of the terminal protection member of the electric compressor which concerns on this invention. It is a schematic side view which shows the state which attached the terminal protection member of the electric compressor which concerns on this invention. It is a schematic sectional drawing which shows the state which similarly attached the terminal protection member of the electric compressor which concerns on this invention. It is explanatory drawing which shows the state which detours a code group along the front-end | tip part of a code | cord | chord receiving piece in the terminal protection member of the electric compressor which concerns on this invention. Similarly, in the terminal protection member of the electric compressor according to the present invention, it is an explanatory view showing a state in which the cord group is detoured along the tip portion of the cord receiving piece. It is a schematic exploded perspective view which shows the terminal protection member of the electric compressor in a prior art example. In the conventional terminal protection member, it is explanatory drawing which shows the state which detours a code group along the front-end | tip part of a code | cord | chord receiving piece. Similarly, in the conventional terminal protection member, it is an explanatory view showing a state in which the cord group is detoured along the tip portion of the cord receiving piece.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Terminal fence 2 Terminal cover 3 Terminal 4, 5, 6 Receiving piece 7, 8 Locking piece 9 Cord extraction hole 10 Cord 11 Code receiving piece 11a Recessed part 11b Tip part 12 Sealed container 13 Projection part 14 Inclined surface 15 Eave-like shape Projection 15a Bending portion 16 Protective member 17 Connector 18 Relay part 19 Code 20 Code group

Claims (3)

  A terminal for energizing the electric mechanism is mounted on the top of the lid of the sealed container that houses the electric mechanism and the compression mechanism operated by the electric mechanism. In the electric compressor to which a protection member comprising a terminal fence and a terminal cover fitted to the terminal fence is attached for protection, the terminal cover has a cord lead hole formed on a side surface, and the cord lead hole. And a cord receiving piece formed opposite to the terminal cover, wherein the cord receiving piece is formed to be shifted downward from a lower end edge of the terminal cover.   The cord receiving piece is provided with a recess for receiving a cord at an upper end edge, and an operation of fitting the cord that has been extracted from the cord drawing hole into the recess while bypassing the tip of the cord receiving piece is provided. The terminal protection member for an electric compressor according to claim 1, wherein the tip portion is formed in a curved shape so as to facilitate the operation.   The cord lead-out hole is provided with an eaves-like projection along the peripheral portion, and a lower end portion of the projection facing the tip end side of the cord receiving piece is for facilitating the detouring of the cord. The terminal protection member for an electric compressor according to claim 2, wherein a curved portion is formed.

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