KR100239819B1 - Motor starter - Google Patents

Abstract

The present invention relates to a motor starting device, in which most components of a conventional starting device are shared to promote the rationalization of parts manufacturing and assembly, and to be compact, inexpensive, and suitable for various motor starting without changing basic parts. An elastic body is brought into contact with both electrodes of the thrust surface of the PTC thermistor disk accommodated through a support frame in a housing having electrical insulation, and a conductive member having a pin terminal portion and a tab terminal portion connected to the elastic body is connected to the thrust of the PTC thermistor disk. On the both electrode side of the surface, the desired terminal configuration is provided, and the conductive member including the pin terminal portion and the tab terminal portion is independently disposed on one side of the PTC thermistor disk in the radial outer circumferential direction, and each tab terminal portion is disposed outside the housing. Protruding and corresponding to each terminal portion in the opening of the housing The cover having an opening on the tooth is fastened to the housing by a fixing member, and the fixing screw for fixing the screw terminal having the tab to the cover has a screw terminal having a tab independently provided in the radial circumferential direction of the PTC thermistor disk. It was comprised so that it might be arrange | positioned substantially linearly with the electrically-conductive member provided with the terminal part and the tab terminal part.

By doing so, it is possible to realize the smallest, cheaper and satisfy the insulation distance required by the legal regulation with the minimum external dimensions and to improve the reliability and stability.

Description

Motor starter

1 is a front view of one embodiment of a starting device for a motor according to the present invention;

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

3 is a side view seen from the right side of FIG.

4 is a plan view seen from the top of FIG.

FIG. 5 is an enlarged cross-sectional view along the dividing line A-A of FIG. 4; FIG.

FIG. 6 shows a combination of the housing and the cover in FIG. 1; FIG.

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

FIG. 8 is a cross-sectional view taken along line B-B of FIG. 7; FIG.

Fig. 9 is an exploded perspective view showing the assembling structure of the starting device of the motor of the embodiment shown in Fig. 1;

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

FIG. 11 is an electric circuit diagram of a motor drive circuit using the one embodiment shown in FIG.

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a motor starting device, and particularly, for example, a compact and large number of terminals suitable for use in a motor starting device of a hermetic compressor of a refrigerator, thereby reducing the energy of RSCR, CSCR, and starting operation of a high power factor motor. This relates to a possible motor starting device.

Various motor starters have been proposed in the past. In particular, the starting device for a hermetic compressor motor used in a refrigerator or the like has recently been required to reduce energy consumption (low power consumption) due to miniaturization and low cost. In addition, from the viewpoint of the recent PL method, there is a strong demand for improvement of newness and safety.

In addition, such a starter of the hermetic compressor motor is mainly used to use a PTC thermistor (Positive Temperature Coefficient Thermistor) in order to obtain a large starting current at the start.

In addition, a starting device using such PTC thermistor is generally fitted with a pin terminal portion provided in the starting device to the pin portion of the wheat terminal provided in the container of the hermetic compressor, whereby the starting device is attached to the hermetic compressor and electrically. Many plug-in types are used.

Various proposals have been made in the related art for miniaturization of such a starter. However, as the representative examples, those described in Japanese Patent Laid-Open Nos. 60-178601 and 60-178603 are proposed. have. Disclosed in this prior art is a start / run circuit type called Resistor Start and Inductor Run (RSIR) and Capacitor Start and Inductor Run (CSIR), as shown in FIGS. 1 and 2 of the latter publication, respectively. It is suitable.

However, since RSIR and CSIR do not flow current in the starting winding of the motor during operation, power consumption in the main winding increases, which is a major disadvantage in terms of energy saving.

Then, by connecting a capacitor for operation in parallel to the PTC thermistor, the RSCR (Resitor Start and Capacitor Run) or CSCR (Capacitor Start and Capacitor Run) which causes an excitation current to flow not only at the start of the motor but also at the start of the motor windings ) Is now used. In RSCR or CSCR, a new terminal for connecting the operating capacitor to the PTC thermistor in parallel is required. In addition, the one disclosed in the related art discloses a three-pin type system in which a conductive member in which a pin terminal portion and a tab terminal portion are integrally disposed on one side of a radially outer circumference of a disc-shaped PTC thermistor disk is disclosed. The cord terminal is formed as a single tab terminal portion. Therefore, in a motor starting method having a capacitor such as a capacitor start / capacitor run method (CSCR), if the power cord is connected to the starter, the code from the capacitor cannot be connected. In such a case, it was necessary to externally wire the code to be connected to the starting device and connect only the branch code to the starting device.

As a result, a method has been adopted in which other electrical products such as an overload protection device or a starting capacitor or an operating capacitor connected to the motor are used in place of the terminal block, or when the terminal block is not possible, an additional terminal block is added. In particular, when the terminal block is used on the capacitor side, it is not a desirable condition in which loose contact occurs in this portion, and the life of the capacitor itself is significantly shortened by heat generation. In the worst case, the capacitor could be destroyed (capacitor malfunction) or even a malfunction of the device itself, such as a refrigerator, could occur.

The connection of several cords to one screw terminal part is disclosed as an example of application in Japanese Patent Laid-Open No. 60-178601 and as a conventional example in Japanese Patent Laid-Open No. 60-178603. If the power cord is directly connected to the power cord, the screw of the power terminal's attachment terminal shall not be used together with other than the power cord. However, this does not apply to the case that there is no possibility that anything other than the power supply cable may fall off when the power supply cable is attached or detached. In order to prevent the tip of the power cord from being split off and to be easily pulled out, it was necessary to prepare a special screw terminal which handled such a divided tip at right angles.

In addition, the above-described conventional example has an independent shape for each use and shape, so that the mold and the production equipment are different.

In other words, all components had to be newly manufactured for various uses, resulting in the production of small quantities of various kinds, and it was impossible to rationalize them. For this reason, there is a problem that the management is distributed not only in cost but also in quality control, resulting in a decrease in reliability.

An object of the present invention is to solve such a problem, and to promote the rationalization of manufacturing and assembling parts by making most of the above-mentioned conventional starter components common, and at the same time without changing the basic part, it is small and inexpensive. It is to provide a motor starting device suitable for starting various motors.

Another object of the present invention is to change the shape of a part of the package of the PTC thermistor disk in the part serving as the terminal block, and the terminal block can be simply assembled and fixed in one direction without jig or tool. It is configured to have a terminal strength that can withstand the pressure input (pushing force) and withdrawal force (pulling force) applied to the terminal, and the terminal part constituting the terminal block, as well as the standards of IEC, UL, VDE, etc. It is to provide a starting device for a motor that can realize a minimum external dimension that satisfies the insulation distance required by legal regulations.

It is still another object of the present invention to provide a motor starting device having improved reliability and safety by forming a terminal block made of thermosetting synthetic resin having excellent heat resistance as well as electrical performance such as arc resistance and tracking resistance.

In order to achieve the above object, the present invention provides a conductive member in contact with both electrodes of the thrust surface of the PTC thermistor disk housed in the space of the housing via a support frame, and having a pin terminal portion and a tab terminal portion in contact with the elastic body. Is arranged to have an arbitrary terminal configuration on both electrode sides of the thrust surface of the PTC thermistor disk, and the conductive member including the pin terminal portion and the tab terminal portion is independently disposed on one side of the radial direction of the PTC thermistor disk. To the starting device of the motor which is protruded out of the housing to each tab terminal part and covered with a cover plate having an opening hole at a position corresponding to each pin terminal part in the opening of the housing and fastened to the housing by a fixing member. The following features are added.

That is, the first feature of the present invention is to provide a fixing portion of a screw terminal having one or a pair of tabs on the cover, and the screw terminal having the tabs is provided independently of the radial outer circumferential direction of the PTC thermistor disk. It is arrange | positioned in linear form substantially coinciding with the center line of the pin terminal part of the electrically-conductive member provided with a pin terminal part and a tab terminal part.

According to the first aspect, the external dimension of the PTC thermistor disk in the radial outer circumferential direction can be minimized.

A second feature of the invention is that the screw terminal portion of the screw terminal having the tab is disposed at a different height from the conductive member on the side of the conductive member provided independently of the radial outer circumferential direction of the PTC thermistor disk, and the tab terminal portion is disposed on the opposite side thereof. The height of the screw terminal portion and the height of the conductive member are located approximately in the middle position.

A third feature of the present invention is that the tab terminal portion of the screw terminal having the tabs arranged in a straight line forms the maximum external dimension in this direction.

According to the second and third features, the external dimensions of the PTC thermistor disk in the thrust circumferential direction can be minimized.

A fourth feature of the present invention is to provide a crank-shaped stage on both sides or one side of the conductive member provided independently of the thrust circumferential direction of the PTC thermistor disk, and on the bottom surface of the tab terminal portion of the screw terminal having a tab. The cross-sectional shape is provided with a bent portion that forms an approximately 'ㅁ' shape having an opening on one side, and the bent portion that forms an approximately 'ㅁ' shape so as to surround the four front ends of the crank-shaped end portion, When the housing and the cover are combined, the combination configuration forms a concave void portion that is slightly wider than the plate thickness of the screw terminal portion along the plate thickness surface of the screw terminal portion of the terminal having the tab, and the screw is formed in the concave void portion. It is possible to fit the end surface of the terminal portion, and when the screw terminal having the tab slides in one direction to the crank-shaped end, ' ㅁ 'to be able to fix the screw terminal with the tab in cooperation with the bent portion and the concave-shaped void portion.

In addition, when providing the said pair of crank-shaped edge parts, it arrange | positions in the symmetrical position centering on the said electroconductive member.

According to the fourth aspect, the screw terminal having the tab can be attached with one touch, and the strength can be sufficiently tolerated in the tensile direction, the compression direction, and the like applied to the tab terminal portion and the screw terminal portion. That is, the tab terminal portion surrounds the cover portion so that its cross-sectional shape is supported by a substantially 'ㅁ' shaped bending portion having an opening on one side, and the screw terminal portion acts as a concave void portion formed by the housing and the lid. This is because the amount of movement is regulated by the effect, and the whole screw terminal having the tab is fixed at the two positions described above.

The fifth feature of the present invention is to provide a convex portion on a part of the inner surface of the bent portion forming a substantially 'ㅁ' shape provided on the bottom surface of the tab terminal of the screw terminal having the tab, and also to provide a slide stop position of the crank-shaped end of the lid. The concave portion is provided at a position corresponding to the convex portion, and the convex portion and the concave portion are configured to fit together.

According to the fifth aspect, since the positional movement of the screw terminal having the tab in the slide direction is fitted in such a manner that the convex portion provided on the screw terminal side having the tab and the concave portion of the lid are press-fitted, they do not easily move in the slide direction. . Therefore, it can withstand the external pressure of a normal handing state enough.

A sixth aspect of the present invention is configured such that the connecting portion of the connecting member electrically connecting between the tab terminal portion inserted into the main coil pin portion and the screw terminal portion having the tab passes the shortest distance along the outer circumferential surface of the housing.

According to the sixth aspect, the external dimension of the PTC thermistor disk in the radial outer circumferential direction can be minimized.

A seventh aspect of the present invention is surrounded by a bent portion forming a substantially 'ㅁ' shape of the bottom surface of the tab terminal of a screw terminal having a tab and a wall surface of the housing of the conductive member side provided independently of the radial outer circumferential direction of the PTC thermistor disk. A screw hole was provided in the part to make a screw tightening space.

According to the seventh aspect, the external dimensions of the PTC thermistor disk in the thrust outer circumferential direction can be minimized.

An eighth aspect of the present invention is a concave groove in a range in which a burring portion of a screw terminal having a tab is burringed, and the burring portion does not contact the cover surface of a substantial portion of the moving amount when the burring portion slides. In addition, a relief blind hole was disposed at the screw end at the screwing side in contact with the concave groove, and the screw end after the screwing was always made deeper than the concave groove surface. .

According to the eighth feature, even if an excessive load is applied to the slide direction of the threaded terminal having the tab after screwing, the screw terminal having the tab becomes a stopper because the tip of the screw contacts the wall surface of the blind hole. There is no deviation from the cover. The tip of the screw is insulated by the blind hole.

A ninth feature of the present invention is that the housing and the cover are formed by thermosetting synthetic resin, and the various components are assembled without caulking.

As a result, it can be set to the strength which can fully endure the stress of the tension direction, compression direction, etc. which are applied to a tab terminal part and a screw terminal part.

Moreover, by setting it as such a structure, a thermosetting synthetic resin can be employ | adopted as a material of a housing. As a result, any thermosetting synthetic resin which is superior to thermoplastic synthetic resins in terms of performance such as heat temperature, arc resistance and tracking resistance can be used, as well as electrical properties such as arc resistance and tracking resistance, as well as heat resistance (especially creep and It is easy to select materials with emphasis on melting point) and the like, and thus it is possible to provide a motor starting device with high reliability and safety.

Generally, the Curie temperature of a PTC thermistor is used 100-135 degreeC as a motor starting device, and the surface temperature of PTC thermistor itself becomes 160-170 degreeC. Under these conditions, the material of the housing and the cover is more thermosetting synthetic resin than thermoplastic synthetic resin.

If the PTC thermistor is thermally runaway, the surface temperature may be greatly exceeded. At this time, the thermosetting synthetic resin than the thermoplastic synthetic resin is not damaged by the original shape, and the safety against fire is proved by the use results of terminal blocks of electrical parts and the like.

In this way, the terminal block portion of the starting device of the motor which also serves as the terminal block is integrated with the housing or the cover, and is assembled without coking, thereby making it possible to compensate for the drawbacks of the thermosetting synthetic resin, which is fragile.

In addition, since the starting device for the motor is formed without using an additional terminal fixing part, it is possible to reduce the part cost and, at the same time, by combining some parts having different shapes, it is possible to simply provide a multi-purpose one. At the same time, since there is a common process, it is also possible to rationalize the process by automatic assembly or the like with a small investment, thereby producing a more inexpensive one. In addition, since the basic shape is common and some parts have different shapes, inserting molds in advance can produce a large variety of parts by the same mold, and therefore, parts having excellent economical efficiency can be manufactured in a short production day.

In addition, it is possible to provide a compact and lightweight motor starting device with high reliability and high safety.

All of the above objects and all other features and features of the present invention will become more apparent from the embodiments described below according to the accompanying drawings.

1 to 10 show an embodiment of a motor starting apparatus according to the present invention suitable for a capacitor start / capacitor run start method.

As shown in Fig. 1 to Fig. 4 and Fig. 9, the starting device of this motor has a lid 14 attached to the lower side of the housing 4, and is fixed by the fixing member 12 (Figs. 1 and 4). It is fixed to the housing 4. The housing 4 has a projection 4b on one side of the PTC thermistor disk 2 (Fig. 9) radially circumferentially stored therein, and the projection 4b has a pin terminal portion 10b and a tab terminal portion ( A common conductive member 10 having 10a) is embedded.

As is clear from Figs. 2, 3 and 5, the cover 14 has a pair of terminal fixing parts 14a for fixing the screw terminals 15 having tabs on both sides of the protrusion 4b of the housing 4. ) Is provided. By this configuration, the screw terminal 15 having this tab is almost in a straight line (in a straight line shape) with the common conductive member 10 embedded in the projection 4b of the housing 4 as shown in FIG. ) Is placed.

In addition, in the arrangement form, as clearly shown in Fig. 2, the screw terminal portion 15a of the screw terminal 15 having the tab is arranged at a different height from the tab terminal portion 10a of the common conductive member 10. The tab terminal portion 15b is disposed at an approximately intermediate position on the opposite side to the height of the screw terminal portion 15a and the height of the tab terminal portion 10a of the common conductive member 10. At this time, the tab terminal portion 15b of the screw terminal 15 having the tabs arranged in a straight line is configured to form the maximum outline dimension W in this direction. In other words, although the entirety of the tab terminal portion 15b is exposed, there is no problem since it is stored in the cover 19 as shown in FIG.

In addition, the fixing method of the screw terminal 15 having the tab to the lid 14 is a common conductive member 10 provided independently of the radial the outer circumferential direction of the PTC thermistor disk 2 of the lid 14 as shown in FIG. Hook-shaped bent portions 15c having crank-shaped end portions 14b provided on both sides thereof, and whose cross-sectional shape has an opening on one side thereof at the bottom surface of the tab terminal portion 15b of the screw terminal 15 having a tab. The hook-shaped bent portion 15c is provided so as to surround the four surfaces of the tip portion of the crank-shaped end portion 14b, and at the same time, the housing 4 and the lid ( When the 14 is combined, the concave void portion 4a which becomes slightly wider than the plate thickness of the screw terminal portion 15a along the plate thickness surface of the screw terminal portion 15a of the screw terminal 15 having the tab (Figs. 5 and Figs. 6), a screw having a tab so that the end face of the screw terminal portion 15a can be fitted to the concave void portion 4a. When the ruler 15 is slid in one direction to the crank-shaped end 14b, the roughly 'ㅁ' -shaped bent portion 15c of the screw terminal 15 having the tab and the concave-shaped void portion 4a cooperate to further strengthen. The screw terminal 15 having a tab can be fixed.

Moreover, in order to make the fixation more certain, the convex part 15d is formed in a part of the inner surface of the substantially "wh" shaped bending part 15c provided in the bottom surface of the tab terminal part 15b of the screw terminal 15 with a tab. ), And the concave portion 14c is provided at a position corresponding to the convex portion 15d at the slide stop position of the crank-shaped end portion 14b of the lid 14, and these concave portions 14c and the convex portion are provided. It is comprised so that 15d may mutually fit.

In addition, it is preferable that the tab terminal support portion 14d provided with the recess 14c has a taper with an inclination that slightly increases from the left direction to the right direction in FIG. 1 in terms of assembly and fixing of the screw terminal 15. .

Further, electrically between the conductive member 9 having the pin terminal portion 9b and the tab terminal portion 9a inserted into the pin portion 1a '(Fig. 11) of the main winding, which will be described later, and the screw terminal portion 15 having the tab. The connecting portion 16a of the connecting member 16 to be connected follows the outer circumferential surface of the housing 4 while maintaining a distance from the tab terminal 15b as shown in FIG.

The connecting member 16 has a receptacle (pin connection terminal) 16b on one side and a screw hole 16c on the other as shown in FIG. 9, and the outlet portion as shown in FIG. 16b is inserted into the tab terminal portion 9a of the conductive member 9, and the screw hole portion 16c overlaps the screw terminal portion 15a of the screw terminal 15 having the tab and is fastened by the screw 17. To perform their attachment and electrical connection.

As shown in Fig. 5, the tab terminal portion of the screw terminal 15 having the side wall surface and the tab of the housing 4 on the common conductive member 10 side provided independently of the radial the outer circumferential direction of the PTC thermistor disk 2 The screw hole 15e is provided in the part enclosed by the hook-shaped bent part 15c of the bottom face of 15b), and this is made into the fastening space of the screw 17. As shown in FIG.

Moreover, the burring part of the screw terminal part 15 of a tab which has a tab is burring | drilled, and this burring process part (on the surface of the cover 14 of the moving amount equivalence part when this burring part 15f (FIG. 5) slides). The concave groove 14d (FIGS. 4, 7 and 8) is provided in the range which 15f does not contact, and it contacts the concave groove 14d, and the screw 17 on the fastening side of the screw 17 is carried out. The blind blind hole 14e (FIGS. 5 and 8) for relief is disposed in the distal end portion 17a of the head), and the distal end portion 17a of the screw 17 after the screw 17 is firmly fastened is always concave. 14d) deeper than the plane.

As mentioned above, although the characteristic part of this invention was demonstrated with reference to FIGS. 1-8, the exploded perspective view of FIG. 9 demonstrates the whole structure of the motor starting device of a present Example further in detail.

As shown in the lower part of Fig. 9, the housing 4 is divided into several rooms, and a flat PTC thermistor disk 2 supported by the support frame 5 is housed in the central room. In another room, the elastic bodies 6 and 7 in contact with the electrodes 2a and 2b on both sides of the PTC thermistor disk 2 are housed. In another room, the elastic body 7 The conductive member 8 having the tab terminal portion 8a at one end and the pin terminal portion 8b at the other end is received via the connecting portion 7a, and the elastic body is passed through the connecting portion 6a of the other elastic body 9. The electrically-conductive member 13 arrange | positioned in the opposite direction to the connection part 7a of (7), which has the tab terminal part 13a at one end of this connection part 6a, and the pin terminal part 13b at the other end is arrange | positioned. Moreover, the conductive member 9 which has the tab terminal part 9a at one end and the pin terminal part 9b at the other end is accommodated and arrange | positioned so as to face the conductive member 8, and the tab terminal part 10a and the pin terminal part are also arrange | positioned. The common conductive member 10 having the 10b is arranged in the room of the protrusion 4b of the housing 4 independently of these. Then, when the cover 14 is covered with the housing 4 in which they are stored, the pin terminals 8b, 9b, and 10b are provided with opening holes 11a, 11b, and 11c provided in the cover 14. Protrudes through the outside. The cover 14 is fixed to the housing 4 by the fixing member 12.

The housing subassembly shown in the lowermost block of Fig. 9 is almost the same as described in the above prior art. Therefore, if this housing subassembly is covered with the cover described in the prior art and integrated with the fixing member 12, a conventional motor starting device is obtained. On the other hand, the lid 14 according to the present invention is shown in the center portion of Fig. 9, and as described above with reference to Figs. 1 to 8, a pair of pairs of protrusions protruding to both sides at the end of any side of the opening hole 11c. While the tab terminal portions 15b and 15c of the screw terminal 15 having the tabs are fixed to the terminal fixing portion 14a, the screw terminal portions 15a of the screw terminal 15 having the tabs are provided with screws 17 and It is screwed to the fixing portion 14a by a square washer 17b. At this time, the pin terminal portion 19b of the conductive member 9 is connected to the outlet portion (pin connecting terminal) 16b of the connecting member 16, and the other screw terminal portion 16c of the connecting member 16 is connected. It is fixed with the screw terminal part 15a of the one screw terminal 15 by the one screw 17. As shown in FIG.

10 and 11 show an attachment structure and a connection diagram when the starter configured as described above is used in the CSCR. In addition, in FIG. 10, the connection cord, the starting capacitor, and the operation capacitor are not shown for the sake of simplicity. 10, 30 is an overload relay.

In the CSCR, in order to improve the power factor, as shown in Fig. 11, the operation capacitor 18 is connected in parallel to the series circuit of the PTC thermistor disk 2 and the start capacitor 3, but the operation capacitor 18 is used for this purpose. One terminal of the terminal and the tab terminal portion 8a of the conductive member 8 are connected by a cord, and the other terminal of the operating capacitor 18 has a tab on the side to which the connecting member 16 is connected. What is necessary is just to connect between the tab terminal 15b of the screw terminal 15 with a cord.

In addition, the power cord, for example, connects one end to the tab terminal portion 10a of the common conductive member 10, and the other side is a screw terminal portion 15a or a pair of tabs of the screw terminal 15 having the tab described above. It may be connected to one of the terminal portions 15b.

Moreover, the screw terminal 15 which has a tab may be arrange | positioned only to one side, and may be provided in pair. When providing one pair, the screw terminal 15 which has the tab of the side which is not used for the above-mentioned use can be used as a simple relay terminal.

In addition, the connecting member 16 may be removed from the screw terminal 15 having the tab on the side to which the connecting member 16 is connected, and the method of use thereof is not limited.

By the above structure, the following effects are acquired in the said Example.

[1] The thrust surface direction of the PTC thermistor disk 2 is the tab terminal portion 15b and the screw terminal portion 15a of the screw terminal 15 having the respective terminal portions, i.e., tabs, and the tab terminal portion 10a of the common conductive member 10. ) As a result of varying the heights in the arrangement of the arrangement), ① a large insulation distance can be ensured, and ② the screw terminal portion 15a is enclosed in the circumferential two directions, so that the square washer when the screw 17 is tightened firmly. A sufficient tightening force is obtained for the terminal of the cord connected between the screw terminal portion 15a and the square washer 17b by acting as a rotating device of 17b. ③ As a square washer 17b used for this, rotation stop prevention Since a special square washer with no function is required, it is easy to obtain and inexpensive.

[2] Since the screw terminal 15 having the tab is disposed on the center line of the pin terminal portion 10b of the common conductive member 10 in the thrust surface direction of the PTC thermistor disk 2, the dimension in this direction is conventional. Since the connection member 16 can be installed through the shortest distance, it can manufacture with the minimum material cost required.

[3] The synergistic effect of the associated shape dimensions of the screw terminal 15 having the lid 14 and the tab, the combination of the lid 14 and the housing 4, and the combination of the screw 17 and the lid 14 This makes it possible to easily and firmly secure the screw terminal having the tab, and to tighten the tap terminal portion 15b in the tension, press-in (push-in) direction and the load perpendicular to this. The terminal 15 is not detached, and ③ similarly, the screw terminal 15 having the tab is not separated even by the load applied to the screw terminal portion 15a.

[4] Since the tab terminal portion 15b of the screw terminal 15 having the tab forms the maximum external dimension, the range of the thrust direction and the radial direction of the PTC thermistor disk 2 is almost 1: 1, that is, 0.9. It can be narrowed to the range of -1.1, and as a result, the housing and the cover can be manufactured with a small amount of thermosetting synthetic resin excellent in electrical insulation and heat resistance, and the cover 19 formed of an electrical insulator covered by such a starting device. As shown in Fig. 10, it can be provided in the same dimensions as in the prior art.

Claims (11)

An elastic body is brought into contact with both electrodes of the thrust surface of the PTC thermistor disk accommodated through a support frame in a housing having electrical insulation, and a conductive member having a pin terminal portion and a tab terminal portion connected to these elastic bodies is connected to the thrust of the PTC thermistor disk. The conductive member including the pin terminal portion and the tab terminal portion is independently disposed on one side of the PTC thermistor disk in the radial outer circumferential direction of the PTC thermistor disk. A starter of a motor which protrudes a tab terminal portion and is fastened to the housing by a fixing member by covering a lid having an opening in a position corresponding to each pin terminal portion in an opening of the housing, the screw having a tab on the lid. A screw terminal having the tab to fix the terminal to the PTC thermistor de Starters of the motor, characterized in that the conductive member provided with the pin terminals and the tab terminal portions provided to be independent of the radial circumferential direction of the large and provided so as to be arranged in a substantially straight line shape. The screw terminal portion of the screw terminal having the tab is disposed at a height different from that of the conductive member on the side of the conductive member provided independently of the PTC thermistor disk in the radial outer circumferential direction. A motor starting device, characterized in that disposed on the opposite side between the height of the screw terminal portion and the height of the conductive member. The starting device for a motor according to claim 1, wherein the tab terminal portion of the screw terminal having the tabs arranged in a straight line forms a maximum external dimension in this direction. The bottom surface of the tab terminal portion of the screw terminal having the tab, while providing crank-shaped ends on both sides or one side of the conductive member provided independently of the radial the circumferential direction of the PTC thermistor disk of the lid. When a hook-shaped bent portion having an opening at one side thereof is provided in the cross section, the hook-shaped bent portion surrounds the four front ends of the crank-shaped end portion, and the housing and the lid are combined. This combination configuration forms a concave void portion that is slightly wider than the plate thickness of the screw terminal portion along the plate thickness surface of the screw terminal having the tab, and inserts the end surface of the screw terminal portion into the concave void portion. The tab having the tab when the screw terminal having the tab is slid in one direction to the crank-shaped end, To cooperate with the substantially curved portion and a portion of the concave-shaped cavity of ㅁja shape of the terminal device start-up of the motor, characterized in that is configured to lock the terminal screw having a tab. The convex part is provided in a part of the inner surface of the said substantially W-shaped bent part provided in the bottom surface of the tab terminal part of the screw terminal which has the said tab, and the said convex of the slide stop position of the said crank-shaped end part of the said cover | cover. A concave portion is provided at a position corresponding to the portion, and the convex portion and the concave portion are configured to fit together. The motor according to claim 1, wherein the connecting portion of the connecting member for electrically connecting the tab terminal portion inserted into the main winding pin portion and the screw terminal portion having the tab passes the shortest distance of 1 mm or less along the outer circumferential surface of the housing. Starter. The screw hole according to claim 4, wherein the hook-shaped bent portion of the bottom surface of the tab terminal portion of the screw terminal having a tab and a wall surface of the conductive member-side housing provided independently of the radial outer circumferential direction of the PTC thermistor disk is provided. The starting device of the motor, characterized in that provided as a screwing space. The method of claim 1, wherein the screw groove portion of the screw terminal having a tab is burring, and a concave groove is provided in a range where the burring processing portion does not contact the cover surface of a substantial portion of the movement amount when the burring processing portion slides. At the same time, a relief blind hole is arranged at the screw end portion at the screwing side in contact with the concave groove, and the screw tip after screwing is always configured to be deeper than the concave groove surface. . The starting device for a motor according to claim 1, wherein the housing and the cover are formed of a thermosetting synthetic resin, and various components are assembled without caulking. 2. The starting device for a motor according to claim 1, wherein the ratio of the dimensions in the thrust surface direction and the radial surface direction of the PTC thermistor disk is in the range of 0.9 to 1.1. 2. The starting device for a motor according to claim 1, wherein the traveling directions of the screws connected to the external connection terminals are all in the same direction.