JP3219355B2 - Motor starter - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a motor starting device suitable for reducing the size and weight.

[0002]

2. Description of the Related Art Various types of motor starting devices have been proposed. In particular, in recent years, a starting device for a motor for a hermetic compressor used in a refrigerator or the like has been demanded to be small in size and to save space and cost. Also, recent PL
As seen in legislative movements, there is a strong demand for improved reliability and safety.

[0003] Such a starting device for a motor for a hermetic compressor takes advantage of its features to make use of the PositiveTemprature Coef.
fcient Thermistar (hereinafter referred to as PTC thermistor)
Is the mainstream of today.

A starting device using such a PTC thermistor is generally provided in a pin portion of an airtight terminal (see Japanese Patent Publication No. 4-23393) provided in a container of a hermetic compressor. In many cases, a plug-in type is used in which the starting device is attached to the hermetic compressor and is electrically connected at the same time by inserting the pin terminal portion. The plug-in type includes a two-pin type that is inserted only into the main winding pin portion and the starting winding pin portion of the motor, and a pin portion that forms a common terminal of the main winding and the starting winding. There are two types, a three-pin type to insert.

As a conventional example of a three-pin type, Japanese Utility Model Publication No.
As disclosed in Japanese Patent No. 17134, there is a device in which a conductive metal fitting having a pin terminal portion and a tab terminal portion integrated with each other is disposed at a position separated from the PTC thermistor on the PTC thermistor storage portion.

Further, Japanese Patent Publication No. Hei 3-24751 discloses that
As described above, in order to reduce the size and weight, a two-pin type in which a conductive terminal fitting in which a pin terminal portion and a tab terminal are integrated is disposed on both electrode sides of the thrust surface of the PTC thermistor in the PTC thermistor storage portion, Further, in addition to this, a three-pin type in which a conductive metal member having a pin terminal portion and a tab terminal portion integrated on one side of a radially outer periphery of a PTC thermistor is independently disposed is disclosed. In addition, examples of a two-pin type are disclosed in JP-B-63-18817, and examples of a three-pin type are disclosed in JP-A-60-178601 and JP-A-60-178601.
It is disclosed in 178603 and the like.

[0007] Furthermore, the above-mentioned Japanese Utility Model Publication No. 54-1713.
Japanese Patent Publication No. 56-25 / 1983 discloses an example of an activation device in which independent tab terminals are provided and the terminal block is also used.
No. 148. Also, apart from this,
An example of an activation device that also serves as a terminal block, in which independent screw terminals are fixed to a mounting base together with components such as a PTC thermistor storage section and a pin terminal section, is applied to Japanese Utility Model Publication No. Sho 62-42483. Each of the conventional examples is described in JP-A-35594.

Here, the above-mentioned Japanese Patent Application Laid-Open No. 60-178603 is disclosed.
The following describes a conventional activation device described in Japanese Patent Application Laid-Open Publication No. H10-15095.

FIG. 17 is an electric circuit diagram of a compressor motor using a starting device based on a phase-separated starting system, FIG. 19 is an exploded perspective view showing a conventional example of the starting device, and FIG. FIG. 21 is a plan view of this conventional example.

[0010] In the starting device according to the starting method for phase separation, FIG.
As shown in FIG. 7, a series circuit of a starting winding 1b and a PTC thermistor 2 is connected in parallel with the main winding 1a of the compressor motor 1.

In such a starting device, as shown in FIGS. 19 to 21, a housing 4 made of a heat-resistant insulating material such as a synthetic resin is used.
The PTC thermistor 2 mainly composed of barium titanate supported by the support frame 5 is housed in the
The two electrodes 2a and 2b of the TC thermistor 2 are respectively provided with an elastic body 6,
7 and contact portions 6a, 6a,
Opposite conductive metal fittings 8 and 9 having tab terminal portions 8a and 9a at one end and pin terminal portions 8b and 9b at the other end are connected and arranged on 7a, respectively, and further, a tab terminal portion 10a and a pin terminal portion are arranged. The conductive fitting 10 having 10b is arranged independently of these. Then, when the lid 11 is put on the housing 4 in which these are accommodated, the pin terminal portions 8b, 9b, 10b protrude outside through the opening holes 11a, 11b, 11c provided in the lid 11. The lid 11 is fixed to the housing 4 by a stopper 12.

When the starting device is mounted on the compressor motor 1 as shown in FIG. 17, the above-mentioned pin terminal portion 9b is attached to the pin terminal portion 1a 'serving as an input terminal of the main winding 1a of the compressor motor 1. The pin terminal portion 1b 'serving as an input terminal of the starting winding 1b is the above-mentioned pin terminal portion 8b, and the pin portion 1c' forming the common input terminal 1c of the main winding 1a and the starting winding 1b is serving as the above-described pin terminal portion 10b. Are fitted and inserted respectively.

FIG. 18 is an electric circuit of a compressor motor using a starting device based on a capacitor starting method, FIG. 22 is an exploded perspective view showing a conventional example of this starting device, and FIG. 23 is a partial sectional view of this conventional example. FIG. 24 is a plan view of this conventional example.

In the starting device using the capacitor starting method,
As shown in FIG. 18, a series circuit of a starting winding 1b, a PTC thermistor 2, and a starting capacitor 3 is connected in parallel with the main winding 1a of the compressor motor 1.

In such an activation device, as shown in FIGS. 22 to 24, a PTC thermistor 2 supported by a support frame 5 is housed in a housing 4 and both electrodes 2a and 2b of the PTC thermistor 2 The elastic bodies 6 and 7 are brought into contact with each other,
A tab terminal portion 8 is connected to one end of the connection portion 7a of one elastic body 7.
a, and the other end of the elastic member 6 is connected to the elastic member 7 by connecting the conductive metal member 8 having the pin terminal portion 8b to the other end.
And a conductive fitting 13 having a tab terminal 13a at one end is connected to the connecting part 6a, and a tab terminal 9a is placed at one end so as to face the conductive fitting 8. A conductive metal member 9 having a pin terminal portion 9b at the other end is disposed, and a conductive metal member 10 having a tab terminal portion 10a and a pin terminal portion 10b is disposed independently of these. Then, the lid 1 is placed in the housing 4 in which these are stored.
1, the pin terminal portions 8b, 9b, 10b
Protrudes outside through opening holes 11a, 11b, 11c provided in the holes. The lid 11 is fixed to the housing 4 by a stopper 12.

As shown in FIG. 18, when the starting device is attached to the compressor motor 1, the above-mentioned pin terminal portion 9b is attached to the pin portion 1a 'serving as an input terminal of the main winding 1a of the compressor motor 1. Pin portion 1b 'serving as an input terminal of starting winding 1b
In addition, the above-mentioned pin terminal portion 8b includes the main winding 1a and the starting winding 1b.
The pin terminals 10b are respectively fitted and inserted into the pin portions 1c 'forming the common input terminals, and the starting capacitor 3 is connected between the tab terminal portions 9a and 13a.

[0017]

As described above, the PTC
Various configurations of the activation device using the thermistor have been proposed, but each has the following problems.

1. In the technology described in Japanese Utility Model Publication No. Sho 54-17154 and Japanese Utility Model Publication No. Sho 56-25148, a PTC thermistor, a pair of elastic bodies in contact with both electrodes on the thrust surface of the PTC thermistor, and a pin terminal portion and a tab terminal portion are provided. Since the integrated conductive fittings are arranged in a plane, the projected area is large and large, and it is inevitable that the material usage fee increases and the cost increases. In addition, a large space is required to attach the starting device to the hermetic compressor, and it goes without saying that the size of the cover that can be covered to electrically insulate the large size compressor increases the cost.

In addition, as described in Japanese Utility Model Publication No. 56-25148, when the terminal block is also used by adding a plurality of independent tab terminals, it is unavoidable to increase the size.

Further, it is necessary to fix the independent tab terminal to the PTC thermistor accommodating portion by some method such as rivet caulking, so that there is a problem that the number of parts is increased and the cost is increased due to an increase in man-hours.

2. In those described in Japanese Utility Model Publication No. 62-42483 as an application example and in Japanese Patent Application Laid-Open No. 61-35594 as a conventional example, a PTC thermistor and a pin terminal supported by an elastic body are described above. Although the pin terminals and the screw terminals are stacked in a downward direction, the projection area is inevitably increased due to the planar arrangement of the pin terminals and the screw terminals.

Further, since each component is configured to be incorporated in the mounting table, it is inevitable that the structure is complicated and the cost of the component is increased.

Although not disclosed in the above publications, the screw terminals are generally fixed by a method such as caulking or press fitting. Therefore, such a process requires not only a jig for caulking and press-fitting but also mechanical equipment such as an air press, and the cost of equipment removal is increased.

3. JP-B-3-24751, JP-B-63-18817, JP-A-60-178601, and JP-A-60-178603 disclose both electrodes on a PTC thermistor plane in a PTC thermistor housing. A two-pin type in which a conductive fitting in which a pin terminal part and a tab terminal part connected to an elastic body are integrated is arranged, and in addition to this, one of the radial outer peripheries of a PTC thermistor,
It describes a three-pin type in which a conductive fitting in which a pin terminal part and a tab terminal part are integrated is independently arranged, but in any case, the terminal for the external connection cord is formed by a single tab terminal part. Have been. Therefore, capacitor activation /
Capacitor run method (CSR: CapacitorStart and
For example, in a motor starting method having a capacitor such as Run),
If the power cord is connected to the activation device, the cord from the capacitor cannot be connected. In such a case, the cord connected to the activation device is connected in advance outside, and only the branch code is connected to the activation device.

As a result, another electric component such as an overload protection device or a starting capacitor connected to the motor, or an operating capacitor is used instead of the terminal block. The method of adding a terminal block was taken. In particular, when a terminal block is obtained on the capacitor side, when a loose contact occurs in this portion, heat generation shortens the life of the capacitor itself, which is not preferable. In the worst case, the capacitor could be punctured and even a device such as a refrigerator could fail.

4. A device for connecting a plurality of cords to one screw terminal portion is disclosed as an application example in JP-A-60-178601, and as a conventional example in JP-A-60-178603. However, if the power cord is directly connected to the power cable, legal regulations (IEC and the Electrical Appliance and Material Control Law) stipulate that "The screw of the power cable mounting terminal must not be used for mounting other than the power cable. However, mounting and removing the power cable This is not the case if there is no danger that anything other than the power supply wire will fall off. " It is necessary to prepare special screw terminals, such as bending the end of the power cord at a right angle, so that the end of the power cord is broken and the end of the power cord is not easily pulled out. Was Tsu.

5. In addition, the above-mentioned conventional example has various applications,
It has an independent shape for each form and uses different molds and production equipment.

That is, all the components must be newly manufactured for each of various uses, and it is difficult to rationalize the production mode in a small-quantity multi-product production mode. For this reason, there has been a problem that, not only in terms of cost but also in terms of quality control, the control power is dispersed, leading to a decrease in reliability.

Normally, a hermetic compressor manufacturer produces and supplies hermetic compressors for various products such as refrigerators, dehumidifiers, and water coolers, as well as to Japan and the world. For this reason, it is not unusual to produce and supply three to four types of activation devices per company in order to conform to the product and the standards of the partner country. In particular, when the activation device does not meet the needs of the partner country or the user, new development is unavoidable. However, when the number of requested devices is small, it is difficult to even collect funds invested in the new development. In addition, when acquiring foreign safety standards or the like for various types having different basic structures, not only application costs but also management costs are not ridiculous, and maintenance of the acquired standards becomes a burden.

In particular, when doing business with foreign countries, there are spot-like businesses, and the products themselves are not always produced. In such a case, since it is a foreign standard that has been acquired, it is usual to keep it until the next business talk without abandoning it.

In addition, since it takes a long time from application to approval, if there is a negotiation during this time, there is an economic disadvantage such as missing a chance.

An object of the present invention is to solve such a problem,
It is an object of the present invention to promote the rationalization of component production and assembly by sharing most of the components, and to provide a variety of small and inexpensive motor starting devices without changing the basic parts.

Another object of the present invention is to change the shape of some parts of the PTC thermistor storage part in the part serving as the terminal block, and to easily assemble and fix the terminal block to this part from one direction without any jigs and tools. And has a terminal strength enough to withstand the pushing and pulling forces applied to the terminals.
Provided is a motor starting device capable of realizing, in addition to foreign standards such as UL and VDE, an insulation distance required by legal regulations such as the Electrical Appliance and Material Control Law with the minimum external dimensions. It is in.

Further, an object of the present invention is to form the terminal block from a thermosetting synthetic resin having excellent heat resistance, not to mention electric resistance such as arc resistance and tracking resistance. An object of the present invention is to provide a motor starting device with improved safety.

[0035]

In order to achieve the above-mentioned object, the present invention relates to a P-type housing which is accommodated in a space of a housing via a support frame.
An elastic body is brought into contact with both electrodes on the thrust surface of the TC thermistor, and a conductive metal fitting having a pin terminal portion and a tab terminal portion in contact with the elastic material has an arbitrary terminal configuration on both electrode sides of the thrust surface of the PTC thermistor. And a metal fitting having a pin terminal portion and a tab terminal portion is disposed independently on one side of the radial outer peripheral direction of the PTC thermistor, and each tab terminal portion is projected outside the housing, and A motor starting device in which an opening of a housing is covered with a lid having an opening hole at a position corresponding to each pin terminal portion and is locked to the housing by a fastener is configured as follows.

1. That is, in the first invention, the lid is provided with a fixing portion for one or a pair of screw terminals with tabs, and the screw terminals with tabs are provided separately from pin terminal portions provided independently in the radial outer peripheral direction of the PTC thermistor. The conductive metal fittings provided with the tab terminal portions were arranged in a straight line substantially coincident with the center line of the pin terminal portion.

2. In the second invention, the screw terminal portion of the screw terminal with tab is arranged on the side of the conductive metal member provided independently in the radial outer peripheral direction of the PTC thermistor, with a step difference from the conductive metal member, and the tab terminal portion is provided. On the opposite side, it was arranged at an intermediate step position between the screw terminal portion and the conductive fitting.

3. In the third invention, the tab terminal portions of the screw terminals with tabs arranged in a straight line form the maximum outer dimensions in this direction.

4. In the fourth invention, a crank-shaped step is provided on both sides or one side of a conductive fitting independently provided in the radial outer peripheral direction of the PTC thermistor of the lid, and a cross section is formed on the bottom surface of the tab terminal part of the screw terminal with tab. A bent portion having a substantially rectangular shape having an opening on one side is provided, and the front surface of the crank-shaped step portion is wrapped by the bent portion having the substantially rectangular shape. When the lid is combined, by this combination configuration, a concave gap portion which is slightly wider than the plate thickness of the screw terminal portion is formed along the plate thickness surface of the screw terminal portion of the screw terminal with tabs. When the screw terminal with tab is slid from one direction to the crank-shaped stepped portion by making the end face of the screw terminal part fittable, a bent portion and a concave gap portion forming a square shape of the screw terminal with tab are formed. Can work together to fix screw terminals with tabs It was.

When a pair of crank-shaped steps are provided, they are arranged symmetrically with respect to the conductive metal fitting.

5. In the fifth invention, a convex portion is provided on a part of the inner surface of the bent portion having a substantially square shape provided on the bottom surface of the tab terminal portion of the screw terminal with tab, and the sliding stop position of the crank-shaped step portion of the lid is provided. A recess is provided at a position corresponding to the protrusion, and the protrusion and the recess are fitted to each other.

6. In the sixth invention, the connection portion of the connection fitting for electrically connecting between the tab terminal portion inserted into the main coil pin portion and the screw terminal portion with the tab passes through the shortest distance along the outer peripheral surface of the housing. Configured.

7. In the seventh invention, the PTC thermistor is surrounded by the wall surface of the conductive metal-side housing provided independently in the radial outer peripheral direction and the substantially square-shaped bent portion on the bottom surface of the tab terminal portion of the screw terminal with tab. A screw hole was provided in the portion to provide a screw tightening space.

8. In the eighth invention, the threaded portion of the tabbed screw terminal is burred, and a concave groove is provided in a range in which the burring portion does not contact the cover surface of a portion corresponding to the amount of movement when the burring portion slides, In addition, an escape blind hole is arranged at the screw tip from the screw tightening side in contact with the concave groove so that the screw tip after screw tightening is always deeper than the concave groove surface.

9. According to the ninth invention, an overhang portion is provided near the tab terminal portion of the conductive metal member arranged at an arbitrary position of the thrust surface of the PTC thermistor on both electrode side housings,
The receptacle portion of the screw terminal with tab having the receptacle portion was fitted and inserted into the tab terminal portion, and the overhang portion was used as a receiving base for the tab terminal portion and the screw terminal.

10. In the tenth aspect, the projecting portion of the box body has a concave portion on the surface forming the maximum outer shape in this direction, and one end of the screw terminal portion of the tabbed screw terminal having the receptacle portion is bent to a positional relationship matching the concave portion. At the same time, a hook portion wider than the width of the concave portion was provided at the leading end in the insertion direction on both side surfaces in the plate width direction of the bent portion, and the center of the hook portion was hollowed out.

11. In the eleventh invention, the housing and the lid are formed of a thermosetting synthetic resin, and various components are assembled without caulking.

[0048]

[Action]

1. According to the first aspect, the outer dimensions of the PTC thermistor in the radial outer peripheral direction can be minimized.

2. In the second and third inventions, the PTC
The external dimensions of the thermistor in the thrust outer peripheral direction can be minimized.

3. According to the fourth aspect of the present invention, the screw terminal with tab can be attached with one touch, and the strength can sufficiently withstand stress applied to the tab terminal portion and the screw terminal portion in the tension direction, the compression direction, and the like. That is, the tab terminal portion is supported by a substantially square-shaped bent portion having an opening on one side so as to wrap a part of the lid portion, and the screw terminal portion is formed of a housing and the lid. This is because the amount of movement is restricted by the action and effect of the concave void portion formed by the above, and the entire screw terminal with tab is fixed at the two locations described above.

4. According to the fifth aspect, the position of the tabbed screw terminal in the sliding direction can be easily shifted in the sliding direction because the convex portion provided on the tabbed screw terminal side and the concave portion of the lid are fitted in a slightly press-fit manner. Will not leave. Therefore, it can sufficiently withstand the external pressure in a normal handling state.

5. In the sixth aspect, the outer dimensions of the PTC thermistor in the radial outer peripheral direction can be minimized.

6. According to the seventh aspect, the outer dimensions of the PTC thermistor in the thrust outer peripheral direction can be minimized.

7. According to the eighth aspect, even if an excessive load is applied in the sliding direction of the tabbed screw terminal after the screw is tightened, the tip of the screw contacts the wall surface of the blind hole, and this portion serves as a stopper to serve as a stopper. Does not come off the lid. Further, the tip of the screw is insulated by the blind hole.

8. According to the ninth aspect, the outer dimensions of the PTC thermistor in the thrust direction can be minimized, and the outer dimensions of the PTC thermistor in the radial direction can be the same as conventional dimensions. Further, unlike the above-described invention, the number of parts can be reduced and the cost can be reduced.

9. In the tenth aspect, when the screw terminal with tab is inserted and fitted into the concave portion provided in the projecting portion of the housing, the hook portion provided in the bent portion of the tab terminal reduces the inner diameter of the hollow portion. Due to the action and effect, the width dimension changes, and after passing through the concave portion, the original shape dimension is restored. At this time, the hook portion is locked at the edge portions on both side surfaces of the concave portion, so that separation in the opposite direction of insertion can be prevented.

As a result, it is possible to obtain a strength sufficient to withstand the stress applied to the tab terminal portion and the screw terminal portion in the tension direction, the compression direction, and the like.

Also, with such a configuration,
Thermosetting synthetic resin can be adopted as a material of the housing. As a result, any thermosetting synthetic resin that surpasses thermoplastic synthetic resins in terms of performance such as heat resistance, arc resistance, and tracking resistance can be used. It is easy to select a material that emphasizes not only characteristics but also heat resistance (especially, creep and melting point) and the like, and a highly reliable and safe motor starting device can be provided.

In general, a PTC thermistor having a Curie temperature of 100 to 135 ° C. is often used as a motor starting device, and the surface temperature of the PTC thermistor itself is 160 ° C.
About 170 ° C. Under these conditions, the thermosetting synthetic resin is more advantageous than the thermoplastic synthetic resin for the housing and the lid.

Also, should the PTC thermistor run away from heat, the above-mentioned surface temperature may be significantly exceeded. At this time, the thermosetting synthetic resin does not lose its original shape than the thermoplastic synthetic resin, and the safety against ignition has been proved from the results of use of terminal blocks of other electric products.

As described above, the terminal block of the motor starter which also serves as the terminal block is integrated with the housing or the lid, and is assembled by caulking, so that the disadvantage of the thermosetting synthetic resin which is easily broken can be covered. And made it available.

Further, since the motor starting device is formed without requiring any other terminal fixing portion, the cost of parts can be reduced, and if some parts having different shapes are combined, A wide variety of products can be easily provided.
At the same time, since there is a common process, the process can be rationalized by automatic assembly or the like with a small investment, so that a cheaper product can be produced. In addition, since parts are common in basic shape and partly different in shape, if they are nested in advance, many kinds of parts can be produced with the same mold, so parts with excellent economical efficiency Can be manufactured in a short production days.

In addition, a small and lightweight motor starting device can be provided with high reliability and high safety.

[0064]

Embodiments of the present invention will be described below with reference to the drawings. FIGS. 1 to 11 show a first embodiment of a motor starting device according to the present invention which employs a capacitor starting / capacitor running starting method. FIG. 1 is a front view of this embodiment, and FIG. 1, FIG. 3 is a side view as viewed from the right side in FIG. 1, FIG. 4 is a plan view as viewed from above in FIG. 1, and FIG. 5 is a sectional view taken along line AA in FIG. FIG. 6 is a cross-sectional view showing a combined portion of the housing and the lid in FIG. 1, FIG. 7 is a partial plan view of the lid alone in FIG. 6, and FIG. 8 is a section line BB in FIG. FIG. 9 is an exploded perspective view showing a comparison between the assembly of the first embodiment and the conventional example shown in FIG. 22, and FIG. 10 is an attachment to an electric apparatus of the first embodiment. FIG. 11 is an electric circuit diagram of a compressor motor using the first embodiment, where 4 is a housing, and 4a is a concave empty space. Part, 8a the tab terminal portions,
9 is a conductive fitting, 9a is a tab terminal part, 10 is a conductive fitting, 1
0a is a tab terminal portion, 10b is a pin terminal portion, 11c is an opening hole, 12 is a stopper, 13a is a tab terminal portion, 14 is a lid,
14a is a fixed portion, 14b is a crank-shaped step portion, 14c is a concave portion, 14d is a concave groove, 14e is a blind hole, 15 is a screw terminal with a tab, 15a is a screw terminal portion, 15b is a tab terminal portion, and 15c is a substantially rectangular shape. Bent portion, 15d is a convex portion, 1
5f is a burring portion, 16 is a connection fitting, 16a is a connection portion, 16b is a receptacle portion, 17 is a screw, 17a is a tip portion, and 17b is a square washer. The parts corresponding to the above-mentioned drawings are denoted by the same reference numerals.

This embodiment is different from the above-described conventional example in that a cover 14 and a screw terminal 15 with a tab are engaged with a part of the cover 14 and used independently as a screw terminal 15 with a tab. Depending on the screw terminal 15 of the screw terminal 15 with tab
A connection fitting 16 can be connected between a and the tab terminal 9 a of the conductive fitting 9.

Hereinafter, the first embodiment will be described.

FIGS. 1 to 3 show that the lid 14 is attached from the lower side of the housing 4 and is fixed to the housing 4 by the fastener 12 (FIGS. 1 and 4). .
In particular, as is clear from FIGS. 2, 3 and 5, a fixing portion 14a for fixing one or a pair of tabbed screw terminals 15 is provided on the lid 14, and the tabbed screw terminals 15 are formed of PTC.
The center of the pin terminal portion 10b (FIG. 5) of the conductive metal fitting 10 having the pin terminal portion 10b and the tab terminal portion 10a provided independently in the radial outer peripheral direction of the thermistor 2 (FIG. 9). They are arranged on a straight line.

In addition, in the arrangement form, as clearly shown in FIG. 2, the screw terminal portion 15a of the screw terminal 15 with tab is provided.
Are arranged on the side of the conductive fitting 10 independently provided in the radial outer peripheral direction of the PTC thermistor 2 with a step difference from the tab terminal 10a of the conductive fitting 10, and the tab terminal 15b
Is disposed on the opposite side at an intermediate step between the screw terminal 15a and the tab terminal 10a of the conductive metal fitting 10. At this time, the tab terminal portions 15b of the screw terminals 15 with tabs arranged on a straight line are configured so as to form the maximum outer dimension portion W in this direction.

As shown in FIG. 5, the screw terminal 15 with tab is fixed to the lid 14 by a conductive metal fitting 10 provided independently of the PTC thermistor 2 of the lid 14 in the radial outer peripheral direction.
The crank-shaped step portion 14b is provided on both sides or one side of
A bent portion 1 having a cross-sectional shape on the bottom surface of the tab terminal portion 15b of the screw terminal 15 with a tab, the cross-sectional shape having an opening on one side.
5c is provided so that the four sides of the tip of the crank-shaped step portion 14b are wrapped by the substantially bent portion 15c, and when the housing 4 and the lid 14 are combined, the combination configuration is used. , Screw terminal portion 15a of screw terminal 15 with tab
A concave gap 4a (FIGS. 5 and 6) slightly wider than the thickness of the screw terminal portion 15a is formed along the thickness of the screw terminal portion 15a, and the end face of the screw terminal portion 15a is fitted into the concave gap portion 4a. When the tabbed screw terminal 15 is slid from one direction to the crank-shaped step portion 14b, the substantially square-shaped bent portion 15c of the tabbed screw terminal 15 and the concave gap portion 4a cooperate. Thus, the screw terminals 15 with tabs can be fixed more firmly.

Further, in order to secure the fixing more securely, a convex portion 15d is formed on a part of the inner surface of the substantially square-shaped bent portion 15c provided on the bottom surface of the tab terminal portion 15b of the tabbed screw terminal 15.
And a concave portion 14c is provided at a position corresponding to the convex portion 15d at the slide stop position of the crank-shaped step portion 14b of the lid 14, and these convex and concave portions 14c and 15d are fitted to each other.

Further, in order to reduce the size, the conductive metal fitting 9 having the pin terminal 9b and the tab terminal 9a inserted into the pin 1a '(FIG. 11) of the main winding and the screw terminal 1 with tab are provided.
5 of connection fitting 16 for electrically connecting between
a can pass along the outer peripheral surface of the housing 4 at the shortest distance (gap of 1 mm or less).

As shown in FIG. 9, the contact fitting 16 has a receptacle portion 16b on one side and a screw hole 16c on the other side, as shown in FIGS. The receptacle part 16b is inserted into the tab terminal part 9a of the conductive metal fitting 9, and the screw hole part 16c is overlapped with the screw terminal part 15a of the screw terminal 15 with the tab and fastened by the screw 17, so that the attachment and the electrical connection are performed. It is what you do.

Further, in order to achieve the same object, as is apparent from FIG. 5, the wall surface of the housing 4 on the side of the conductive fitting 10 provided independently in the radial outer peripheral direction of the PTC thermistor 2 and the screw terminals with tabs. A screw hole 15e is formed in a portion of the bottom surface of the tab terminal portion 15b surrounded by the bent portion 15c having a substantially square shape.
And this is used as a tightening space for the screw 17.

The threaded portion of the tabbed screw terminal 15 is burred, and the burring portion 15f comes into contact with the surface of the lid 14 corresponding to the amount of movement when the burring portion 15f (FIG. 5) slides. A recessed groove 14d (FIGS. 4, 7 and 8) is provided in a range where the screw 17 does not come in contact with the recessed groove 14d. 8) is disposed, and the tip 17a of the screw 17 after the screw 17 is tightened
Is always deeper than the surface of the concave groove 14d.

In this embodiment of the capacitor starting method configured as described above, in order to improve the power factor, as shown in FIG. 11, the operating capacitor 18 is connected in parallel with the series circuit of the PTC thermistor 2 and the starting capacitor 3. For this purpose, a cord is connected between one terminal of the operating capacitor 18 and the tab terminal portion 8a of the conductive fitting 8, and the other terminal of the operating capacitor 18 and the connecting fitting 16 are connected. What is necessary is just to connect with the tab terminal 15b of the screw terminal 15 with a tab on the side where it exists.

Further, for example, one of the power supply cords may be connected to the tab terminal portion 10a of the conductive metal fitting 10, and the other may be connected to one of the screw terminal 15a of the screw terminal 15 with a tab or the pair of tab terminals 15b.

Further, one screw terminal 15 with tab may be provided on one side, or a pair of screw terminals 15 may be provided. When a pair is provided, the screw terminal 15 with tab on the side not used for the above-mentioned application can be used as a simple relay terminal.

Further, the connection fitting 16 may be detached from the screw terminal 15 with a tab to which the connection fitting 16 is connected, and the connection method is not limited at all.

With the above configuration, the following effects can be obtained in the first embodiment.

1. The thrust surface direction of the PTC thermistor 2 is a result of the arrangement of the respective terminal portions, that is, the tab terminal portion 15b and the screw terminal portion 15a of the tabbed screw terminal 15 and the tabular terminal portion 10a of the conductive metal fitting 10 being stepped. A large insulation distance can be secured. Since the screw terminal portion 15a is surrounded from two directions, when the screw 17 is tightened, the screw terminal portion 15a acts as a rotation stopper for the square washer 17b, and is connected to the terminal of the cord connected between the screw terminal portion 15a and the square washer 17b. Sufficient tightening force can be obtained. Therefore, as the square washer 17b used here, a special square washer with anti-rotation is not required, and therefore, an easily available and inexpensive one can be used.

2. In the thrust surface direction of the PTC thermistor 2, since the screw terminal 15 with tab is arranged on the center line of the pin terminal portion 10b of the conductive metal 10, the dimension in this direction can be the same as the conventional one. Since it can be disposed on the connection fitting 16 through the shortest distance, it can be manufactured with a minimum necessary material cost.

3. Due to the synergistic effects of the lid 14 and the screw terminal 15 with tabs, the combined configuration of the lid 14 and the housing 4, and the combined configuration of the screw 17 and lid 14, the mounting of the screw terminal with tabs is simple and firm. Can be. The tab-equipped screw terminal 15 does not come off in the pulling and pushing directions of the tab terminal portion 15b and the load in the direction perpendicular thereto. Similarly, even if a load is applied to the screw terminal portion 15a, the screw terminal 15 with tab does not come off.

4. Tab terminal part 15 of screw terminal 15 with tab
Since b forms the maximum external dimension, the thrust-direction dimension and the radial-direction dimension of the PTC thermistor 2 are in a range close to one-to-one, that is, 0.9 to 1.1.
In the range. As a result, a housing and a lid can be manufactured with a small amount of thermosetting synthetic resin having excellent electrical insulation and heat resistance. Further, as shown in FIG. 10, a cover 19 formed of an electrical insulator that can be covered by the activation device can be provided in the same size as that of the related art.

It should be noted that, even if the tab terminal portion 15b serving as a charged portion forms an outer shape, the electric insulation is maintained at the cover 19.
It is protected by

FIGS. 12 to 16 show a second embodiment of the motor starting apparatus according to the present invention which employs a phase-separated starting method. FIG. 12 is a front view of this embodiment, and FIG.
FIG. 14 is a side view showing a partial cross section viewed from the right side of FIG.
FIG. 15 is a perspective view showing a combination of a screw terminal with tabs and a housing 21 as main components in FIG. 12, and FIG. 16 is an electric circuit diagram of this embodiment.
0 is a screw terminal with a tab, 20a is a receptacle part, 20
b is a tab terminal part, 20c is a screw terminal part, 20d is a bent part, 20e is a hook part, 20f is a hollow part, 20g is a tip part, 21 is a housing, 21a is an overhang part, and 20b is a concave part. The parts corresponding to the above-mentioned drawings are denoted by the same reference numerals.

The difference between this embodiment and the conventional motor starting device based on the phase-separated starting method is the case 21 and the screw terminals 20 with tabs made of an elastic good electric conductor.

That is, in FIGS. 12 to 15, the conductive member disposed at an arbitrary position of the housing 21 on the both electrodes 2a and 2b side of the thrust surface of the PTC thermistor as shown in FIG. An extension 21a is provided in the vicinity of the tab terminal portion 9a of the metal fitting 9, a receptacle portion 20a of the screw terminal 20 with a tab is fitted and inserted into the tab terminal portion 8a, and a receiving base for the tab terminal portion 20b and the screw terminal portion 20c. Further, a protrusion 21b is provided on the distal end surface of the protrusion 21a, which is the maximum outer shape of the protrusion 21a, and one end of the screw terminal portion 20c of the screw terminal 20 with tab is positioned in a positional relationship matching the recess 21b. At the same time, a hook 20e wider than the width of the concave portion 21b is provided at the leading end of the bent portion 20d in the insertion direction on both side surfaces in the plate width direction. And a hollowed portion 20f provided in the central portion of the 0e, has the hook portion 20e to be 2 minutes.

The screw terminal with tab 20 and the projecting portion 21a of the housing 21 and their shapes and configurations are shown in detail in FIG.

In order to attach the screw terminal 20 with a tab, as shown in FIG. 15, the receptacle 20a is inserted into the tab terminal 9a of the conductive metal fitting 9, and the tip 20g of the hook 20e is connected to the recess 21a of the overhang 21a of the housing 21. Slide into 21b. At this time, the outer shape of the hooking portion 20e fits the width of the concave portion 21b so that the width of the hollow portion 20f is reduced by compression. Thereafter, when the hooking portion 20e passes through the concave portion 21b, the hollow portion 20f is formed.
Is restored to the original size, and as shown in FIG. 12, the hooking portion 22e is hooked on the surface of the projecting portion 21a in a direction perpendicular to the concave portion 21b so that the hooking portion 22e does not separate in the direction opposite to the insertion direction. Locked.

In this embodiment using the phase-separated start / capacitor run system having the above-described configuration, as shown in FIG. 16, an operating capacitor 18 is connected in parallel with the PTC thermistor 2 to improve the power factor. However, one terminal of the operating capacitor 18 is connected to the tab terminal portion 8a of the conductive metal fitting 8 by a cord, and the other terminal is connected to the tab terminal portion 20b of the screw terminal 20 with tab by a cord.

The power cord is connected to, for example, the other tab terminal portion 20b and the screw terminal portion 20c of the screw terminal 20 with tab.
What is necessary is just to connect to either. At this time, a large load in the insertion / removal direction is applied to the tab terminal portion 20b of the tabbed screw terminal 20, but the tab terminal portion 20b is detached from the concave portion 21b of the housing 21 due to the locking effect of the hook portion 20e and the clamping force of the receptacle portion 20a. There is no.

Further, even if a load is applied to the screw terminal portion 20c, the screw terminal portion 20c is held by the same effect.

In the embodiment described above, the number of parts can be reduced and the size can be reduced as compared with the conventional starting device, and the economy is correspondingly improved.

Further, there is no need to change the basic structure of the conventional starting device, and after the assembly of all the components is completed, a screw terminal with a tab may be provided if necessary, which meets all needs. You can do it.

Although the above embodiment has been described as a three-pin type starting device, the two-pin type starting device can be similarly employed, and has an advantage that is not affected by the method.

The screw terminals 20 with tabs can be installed on any of the tab terminals as required.

[0097]

As described above, according to the present invention,
Since it is possible to easily obtain products suitable for various applications without changing the basic structure of the conventional technology, it is possible to reduce the number of management steps as well as the cost by sharing the components.

Further, according to the present invention, assembling up to the middle is the same as that of the prior art, so that it is easy to promote the rationalization by automation of assembling and the like. This makes it easier to look sideways and enables streamlining of management.

Further, according to the present invention, a large insulation distance can be achieved with the smallest external dimensions by the multifunctionality with the minimum components without the limitation of the material surface, so that the small size, light weight and high reliability can be achieved. High safety can be achieved, and practical application is easy, and its practical value is great.

[Brief description of the drawings]

FIG. 1 is a first embodiment of a motor starting device according to the present invention.

FIG. 2 is a side view showing a part viewed from the left side of FIG. 1 in cross section.

FIG. 3 is a side view as viewed from the right side of FIG. 1;

FIG. 4 is a plan view seen from above in FIG. 1;

FIG. 5 is an enlarged sectional view taken along the line AA of FIG. 4;

FIG. 6 is a diagram showing a combination part of a housing and a lid in FIG. 1;

FIG. 7 is a partial plan view of the lid alone in FIG. 6;

FIG. 8 is a sectional view taken along the line BB in FIG. 7;

FIG. 9 is an exploded perspective view showing a comparison between an assembling configuration of the first embodiment shown in FIG. 1 and a conventional motor starting device.

FIG. 10 is an exploded perspective view for explaining attachment to the electric device of the first embodiment shown in FIG. 1;

FIG. 11 is an electric circuit diagram of the first embodiment shown in FIG.

FIG. 12 is a second embodiment of the motor starting device according to the present invention.

FIG. 13 is a side view showing a cross section of a part viewed from the right side of FIG.

FIG. 14 is a plan view seen from above in FIG. 12;

FIG. 15 is a perspective view showing a combination of a tabbed screw terminal and a housing in FIG. 12;

FIG. 16 is an electric circuit diagram of the second embodiment shown in FIG.

FIG. 17 is an electric circuit diagram of a starting device using a phase-separated starting method.

FIG. 18 is an electric circuit diagram of a starting device using a capacitor starting method.

FIG. 19 is an exploded perspective view showing a conventional starting device using a phase separation starting method.

20 is a front view of the conventional activation device shown in FIG. 19, showing a partial cross section.

FIG. 21 is a plan view of the conventional activation device shown in FIG.

FIG. 22 is an exploded perspective view of a conventional starting device using a capacitor starting method.

FIG. 23 is a front view of the conventional starter shown in FIG. 22 showing a partial cross section.

FIG. 24 is a plan view of the conventional activation device shown in FIG.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Compressor motor 2 PTC thermistor 3 Starting capacitor 4 Housing 5 Support frame 6 Elastic body 7 Elastic body 8 Conductive metal fitting 9 Conductive metal fitting 10 Conductive metal fitting 11 Lid 12 Stop fitting 13 Conductive metal fitting 14 Cover 15 Screw terminal with tab 16 Hardware 17 Screw 18 Operating capacitor 19 Cover 20 Screw terminal with tab 21 Housing

──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-58-137894 (JP, A) JP-A-54-113081 (JP, A) Fully open 1979-64240 (JP, U) Really open 1979 197769 (JP, U) Jikken 54-17134 (JP, Y2) (58) Fields investigated (Int. Cl. ⁷ , DB name) H02P 1/44 H02K 17/30

Claims (14)

(57) [Claims] 1. A P stored in a space of a housing via a support frame.
An elastic body is brought into contact with both electrodes on the thrust surface of the TC thermistor, and a conductive metal fitting having a pin terminal portion and a tab terminal portion in contact with these elastic materials is provided with an arbitrary terminal configuration on both electrode sides of the thrust surface of the PTC thermistor. In addition, the PTC thermistor is independently arranged with a conductive metal fitting having a pin terminal portion and a tab terminal portion on one side in a radial outer peripheral direction of the PTC thermistor, and each tab terminal portion is projected outside the housing. A motor having a cover having an opening at a position corresponding to each pin terminal at an opening of the housing, and being locked to the housing by a fastener; The PTC thermistor is provided with a fixed portion for a screw terminal or a pair of screw terminals with tabs, and the screw terminal with tabs is a conductive metal fitting having a pin terminal portion and a tab terminal portion provided independently in the radial outer peripheral direction of the PTC thermistor Motor starting device, characterized in that arranged in a straight line to substantially coincide on the center line of the down terminal portion. 2. The PTC thermistor according to claim 1, wherein the screw terminal portion of the tab-equipped screw terminal is provided with a step difference with the conductive metal fitting on a side of the conductive metal fitting provided independently in a radial outer peripheral direction of the PTC thermistor. A motor starting device, wherein the tab terminal portion is arranged on the opposite side at an intermediate step between the screw terminal portion and the conductive metal fitting. 3. The motor starting device according to claim 1, wherein the tab terminals of the screw terminals with tabs arranged in a straight line form a maximum outer dimension in this direction. 4. The method according to claim 1, wherein a crank-shaped step is provided on both sides or one side of the conductive fitting independently provided in a radial outer peripheral direction of the PTC thermistor of the lid. A cross-sectional shape is provided on the bottom surface of the tab terminal portion of the tabbed screw terminal with a substantially brace-shaped bent portion having an opening at one side, and the crank-shaped stepped portion is formed by the substantially brace-shaped bent portion. When the housing and the lid are combined with each other so as to enclose the four front ends, the thickness of the screw terminal portion is increased along the thickness of the screw terminal portion of the screw terminal with tabs by this combination structure. Forming a concave gap portion that is slightly wider, allowing the end surface of the screw terminal portion to be fittable in the concave gap portion, and sliding the tab-equipped screw terminal to the crank-shaped step portion from one direction. The substantially square-shaped bend of the threaded terminal A motor starting device, characterized in that the screw terminal with tab is fixed in cooperation with the concave portion and the concave gap portion. 5. The method according to claim 1, wherein a convex portion is provided on a part of the inner surface of the substantially square-shaped bent portion provided on a bottom surface of the tab terminal portion of the screw terminal with tab. A concave portion is provided at a position corresponding to the convex portion at the slide stop position of the crank-shaped step portion of the lid, and the convex portion and the concave portion are fitted to each other, so that the motor is started. apparatus. 6. A housing according to claim 1, wherein a connection portion of a connection fitting for electrically connecting between the tab terminal portion inserted into the main coil pin portion and the screw terminal portion with tab is formed on the outer periphery of the housing. A motor starting device configured to pass through a shortest distance of 1 mm or less along a surface. 7. The PTC thermistor according to claim 1, wherein the PTC thermistor is provided with a wall surface of the conductive fitting side housing and a bottom surface of a tab terminal portion of a screw terminal with tab provided independently in a radial outer peripheral direction. A motor starting device, wherein a screw hole is provided in a portion surrounded by a substantially bended-shaped bent portion to provide a screw tightening space. 8. The burring process according to claim 1, wherein the threaded portion of the screw terminal with tabs is burred, and the burring process is performed on a cover surface corresponding to the amount of movement when the burring portion slides. A concave groove is provided in a range where the portion does not contact, and an escape blind hole is arranged at the screw tip from the screw tightening side in contact with the concave groove so that the screw tip after screw tightening is always deeper than the concave groove surface. A motor starting device, characterized in that: 9. A P stored in a space of a housing via a support frame.
An elastic body is brought into contact with both electrodes on the thrust surface of the TC thermistor, and a conductive fitting having a pin terminal portion and a tab terminal portion in contact with the elastic material has an arbitrary terminal configuration between both electrodes on the thrust surface of the PTC thermistor. In addition to the rearrangement, a conductive metal having a pin terminal portion and a tab terminal portion is independently disposed on one side in the radial outer peripheral direction of the PTC thermistor, and each tab terminal portion is projected outside the housing, and An opening of the housing is covered with a lid having an opening at a position corresponding to each of the pin terminals, and a starter of the motor locked to the housing by a fastener is provided with both ends of the thrust surface of the PTC thermistor. An overhang is provided near the tab terminal of the conductive metal fitting disposed at an arbitrary position on the electrode side housing, and the receptacle of the screw terminal with tab having the receptacle is fitted and inserted into the tab terminal. And motor activation device characterized by using 該張 out portion as cradle tab terminal and screw terminal. 10. The protrusion according to claim 9, wherein the protrusion of the housing has a concave portion on the surface forming the maximum outer shape in this direction, and one end of the screw terminal portion of the screw terminal with tab having the receptacle portion matches the concave portion. A hook portion wider than the width of the concave portion is provided at the leading end of the bent portion in the insertion direction of both side surfaces in the plate width direction, and the center portion of the hook portion is hollowed out. A motor starting device, characterized in that: 11. The motor according to claim 1, wherein the housing and the lid are formed of a thermosetting synthetic resin, and various components are assembled without caulking. apparatus. 12. The PTC thermistor according to claim 1, wherein a ratio of a dimension in a thrust plane direction to a dimension in a radial plane direction of the PTC thermistor is in a range of 0.9 to 1.1. Motor starter 13. The motor starting device according to claim 1, wherein the leading directions of the receptacle and the screw connected to the external connection terminal are all the same. 14. The motor starting device according to claim 1, wherein the device for the screw terminal with tab is performed in a final assembly process.