JP5307509B2 - Motor and thermistor manufacturing method - Google Patents

Description

The present invention relates to a particular motor having a thermistor, motor, to a method for manufacturing a 及 beauty thermistor.

  Conventionally, as a thermistor, there is one provided with a thermistor element whose electrical resistance changes greatly with respect to a temperature change and a conductive plate fixed so as to sandwich the thermistor element (see, for example, Patent Document 1).

  For example, as shown in FIG. 10, the thermistor 101 is inserted and held in the receiving recess 102 a of the end bracket 102 in the motor, and is supplied to a power supply terminal 103 for supplying power to an armature (not shown). Some are electrically connected.

  The thermistor 101 includes a plate-like thermistor element 104 and a pair of plate-like conductive plates 105 and 106. The plate-like conductive plates 105 and 106 are sandwiched between the sandwiching portions 105a and 106a having substantially the same shape as the plane of the thermistor element 104 (a rectangle slightly larger than the thermistor element 104 when viewed from the plane orthogonal direction), and from the sandwiching portions 105a and 106a along the plane. Terminal portions 105b and 106b that protrude (outside the housing recess 102a). The plate-like conductive plates 105 and 106 are fixed to the plane of the thermistor element 104 by soldering so that the thermistor element 104 is sandwiched between the clamping portions 105a and 106a.

As shown in FIG. 11, the thermistor 101 configured in this manner includes a plate-like conductive plate 105, solder, thermistor element 104, solder, and plate-like conductive plate 106 stacked in this order in a mold 110. The sandwiched portions 105a and 106a and the thermistor element 104 are fixed by soldering (melted and solidified solder) by heating in the state.
Japanese Patent No. 3857571

  By the way, in order to facilitate the work (automation) of housing the plate-like conductive plates 105 and 106 in the die 110, the die 110 is viewed from the plane orthogonal direction of the plate-like conductive plates 105 and 106. , 106 is accommodated so as to have a slight gap with the plate-like conductive plates 105, 106. For this reason, when the thermistor element 104 is viewed from the plane orthogonal direction at the time of manufacture, the abutting side end portion around the sandwiching portions 105a and 106a (the portion that may come into contact with the bottom portion 102b or the inner portion 102c of the housing recess 102a). May protrude slightly. FIG. 11 shows a state in which the thermistor element 104 slightly protrudes from the portion corresponding to the bottom 102b of the housing recess 102a around the sandwiching portions 105a and 106a when viewed from the plane orthogonal direction.

  As a result, the thermistor element 104 may come into contact with the bottom 102b or the inner portion 102c of the housing recess 102a when it is housed (installed) in the housing recess 102a (installation portion). This is because the thermistor element 104 is deformed or the solder protruding from the plane of the thermistor element 104 is crushed so that the pair of plate-like conductive plates 105 and 106 are directly connected (not via the thermistor element 104). It will cause.

The present invention has been made to solve the above-described problems. The object of the present invention is to prevent the thermistor element from being deformed and to directly connect the pair of plate-like conductive plates (through the thermistor element). not) motor is prevented from being rendered conductive to provide a method for producing 及 beauty thermistor.

According to the first aspect of the present invention, the thermistor element is sandwiched between a plate-like thermistor element whose electric resistance greatly changes with respect to a temperature change, and a holding part having substantially the same shape as the plane of the thermistor element. A thermistor having a pair of plate-like conductive plates fixed to the plane of the element by a conductive connecting member and electrically connected to a power supply terminal for supplying power to the armature; and the thermistor on the plane And a housing holding member having a housing recess for housing and holding the thermistor, wherein the plate-like conductive plate is arranged in the direction in which the thermistor is inserted into the housing recess. A protrusion formed at the tip so as to protrude toward the bottom of the receiving recess, and the thermistor prevents the thermistor element from protruding further toward the bottom of the receiving recess than the protruding portion; Made is and, the projecting portion is in a state in which the thermistor is received and held in the housing recess, it abuts against the bottom portion of the housing recess.

According to this configuration, since the protruding portion is formed at the tip of the plate-like conductive plate in the direction in which the thermistor is inserted into the receiving recess, the thermistor element slightly protrudes from the tip of the clamping portion (end in the insertion direction) during manufacturing. However, when the thermistor is inserted (accommodated and held) into the accommodating recess, the thermistor element is prevented from abutting against the bottom as a result of the protruding portion abutting against the bottom of the accommodating recess first. When the thermistor is inserted and held in the receiving recess as described above, the tip end side in the insertion direction of the thermistor is likely to be pressed against the bottom of the receiving recess, but at this time, the thermistor element contacts the bottom. The contact is prevented. Accordingly, the thermistor element is more effectively prevented from being deformed, and the conductive connecting member (solder or the like) protruding from the plane of the thermistor element is crushed so that the pair of plate-like conductive plates are directly (thermistor element). It is more effectively prevented to be in a conductive state (without going through).

The housing In the invention described in claim 2, in the motor according to claim 1, wherein the plate-shaped conductive plate, the said side portion facing the side part of the direction perpendicular to the direction of inserting the thermistor to the housing recess The housing further includes a side-side projecting portion formed so as to project toward the inner side of the recess, and the thermistor is configured such that the thermistor element faces the side-side projecting portion rather than the side-side projecting portion. It is comprised so that it may not protrude to the inner part side of a recessed part .

In this structure, even if the thermistor element during manufacturing is slightly protruded from the side of the clamping portion (insertion orthogonal direction end portion), the side-side projection when the thermistor is inserted (accommodated held) in the accommodating recess Prevents the thermistor element from abutting against the inner side by first abutting against the inner side of the housing recess. Therefore, the thermistor element is further prevented from being deformed, and the conductive connecting member (solder or the like) protruding from the plane of the thermistor element is crushed so that the pair of plate-like conductive plates are directly connected (without the thermistor element interposed). ) It is further prevented from becoming a conductive state.

According to a third aspect of the present invention, there is provided a plate-like thermistor element whose electric resistance greatly changes with respect to a temperature change, and a sandwiching portion having substantially the same shape as the plane of the thermistor element, and the thermistor e Bei a pair of plate-shaped conductive plate which is fixed by the conductive connection member to the plane of the thermistor element so as to sandwich the element, the plate-like conductive plate, at the periphery of the clamping portion when viewed from a plane perpendicular to the direction A method of manufacturing a thermistor having a protruding portion protruding from a part of an abutting side end during installation , wherein the plate-like conductive plate, the conductive connecting member, and the thermistor element are provided in a mold to manufacture the thermistor. A conductive connecting member, and the plate-like conductive plate are stacked in this order, and heated in that state, and the clamping part and the thermistor element are fixed by the conductive connecting member, and the mold is provided. , Avoiding the protrusion Standing time a protrusion protruding provided on the abutting end portion side, performs the fixing process by placing the convex portion so as to avoid the protrusion.

  According to this configuration, the plate-like conductive plate has a protruding portion that protrudes from a part of the contact-side end portion at the time of installation around the sandwiching portion when viewed from the plane orthogonal direction. Even if the thermistor slightly protrudes from the contact-side end during installation around the clamping part, when the thermistor is installed at the installation part, the projection part contacts the installation part first, so that the thermistor element becomes the installation part. The contact is prevented. Therefore, the thermistor element is prevented from being deformed, and the conductive connecting member (solder or the like) protruding from the plane of the thermistor element is crushed to directly connect the pair of plate-like conductive plates (without the thermistor element). It is prevented that the conductive state is established.

According to the present invention, the mold is provided with a projecting portion that protrudes toward the abutting side end side while avoiding the projecting portion, and the projecting portion is disposed so as to avoid the projecting portion, and the fixing process is performed. Sometimes, the convex portion can prevent the thermistor element from protruding from the protruding portion. Therefore, the thermistor which can acquire said effect can be manufactured easily.

According to the first and second aspects of the present invention, the thermistor element is prevented from being deformed, and the pair of plate-like conductive plates are directly connected (not via the thermistor element). A motor with a thermistor to be prevented can be provided.

According to the invention described in claim 3 , the thermistor element is prevented from being deformed, and the pair of plate-like conductive plates are directly connected (not via the thermistor element). A method of manufacturing a thermistor that can be prevented can be provided.

Hereinafter, an embodiment of the present invention will be described with reference to FIGS.
FIG. 1 shows a motor 1 of the present embodiment. The motor 1 of the present embodiment is used as a drive source for a power seat device of a vehicle, and each mechanism portion of the seat, for example, a mechanism portion that slides the seat back and forth, a mechanism portion that tilts the backrest portion of the seat, etc. It is a motor equipped with.

  The motor 1 includes a yoke 2 formed of a magnetic metal material in a substantially bottomed cylindrical shape, and a magnet 3 is fixed to the inner peripheral surface of the yoke 2. Incidentally, the number of magnetic poles of the magnet 3 of the present embodiment is “4”. An armature 4 is rotatably accommodated inside the magnet 3. The armature 4 includes a rotating shaft 5, a core 6 fixed to the rotating shaft 5, a winding 7 wound around the core 6, and a tip side of the core 6 (opening end 2 a side of the yoke 2). And a commutator 8 fixed to the rotary shaft 5 and connected to the winding 7. The armature 4 is rotatably supported by a bearing 9 in which the base end portion of the rotating shaft 5 is held at the bottom center of the yoke 2. An end bracket 10 as an accommodation holding member is fixed to the opening end 2a of the yoke 2 so as to substantially close the opening end 2a in a state where the armature 4 is accommodated.

  The end bracket 10 is made of a resin material and is formed in a substantially disc shape corresponding to the opening end 2a of the yoke 2 (see FIG. 2). As shown in FIG. 1, a through hole 10a is formed in the center of the end bracket 10 so as to pass through in the axial direction in order to insert the tip of the rotary shaft 5, and the inside of the yoke 2 inside the through hole 10a. The bearing 11 is held in the. A front end portion of the rotary shaft 5 is rotatably supported by the bearing 11, and the front end portion of the rotary shaft 5 is exposed in a through hole 10a so as to be connectable to a load side connecting portion.

  Further, the end bracket 10 is integrally formed with a connector portion 10b that protrudes to the outside of the yoke 2 (to the left in FIG. 2) when viewed from the axial direction of the armature 4 (see FIG. 2). Specifically, as shown in FIG. 2, the end bracket 10 is formed with two left and right fixing portions 10c protruding from a substantially circular shape corresponding to the yoke 2 when viewed from the axial direction of the armature 4, and on the left side thereof. A connector portion 10b is formed so as to protrude further leftward from between the two fixed portions 10c.

  The connector portion 10b has a substantially cylindrical shape (along the yoke 2 (lower side in FIG. 1) so that an external connector of a control device (power supply device) (not shown) can be fitted along the axial direction of the armature 4. )) Is extended.

  As shown in FIG. 2, the end bracket 10 is disposed inside a substantially circular shape corresponding to the yoke 2 when viewed from the axial direction of the armature 4 and is paired with a power supply that is held movably in the radial direction. Brushes 12 and 13 and torsion coil springs 14 and 15 for urging the power supply brushes 12 and 13 radially inward to press-contact the commutator 8 (see FIG. 1) are provided. Further, the end bracket 10 is electrically connected to the power supply brushes 12 and 13 respectively, and protrudes outward from the substantially circular shape (from the inside) corresponding to the yoke 2 when viewed from the axial direction of the armature 4. A pair of power supply terminals 16 and 17 extending to 10b are provided. In addition, as shown in FIGS. 2 and 3, the one power supply brush 12 in the present embodiment has a pigtail 12 a provided in a housing recess 10 d as an installation portion formed in the end bracket 10. 18 is electrically connected to the power supply terminal 16 via the power supply 18.

  Specifically, the thermistor 18 includes a PTC element 21 as a plate-shaped (rectangular) thermistor element whose electric resistance greatly changes with temperature change, and a substantially same shape as the plane of the PTC element 21 (a rectangular shape slightly larger than the PTC element 21). A pair of fixing portions 22a and 23a fixed to the plane of the PTC element 21 with solder (soldering) as a conductive connecting member so that the PTC element 21 is sandwiched between the holding portions 22a and 23a. Plate-like conductive plates 22 and 23 are provided. Note that the plate-like conductive plates 22 and 23 of the present embodiment are copper plates. Further, the plate-like conductive plates 22 and 23 of the present embodiment are projected portions 22b that project along a plane (downward in FIG. 3) from a part of the periphery of the sandwiching portions 22a and 23a when viewed from the plane orthogonal direction. , 23b. In other words, the plate-like conductive plates 22 and 23 exclude the PTC element 21 when viewed from the direction along the plane (left direction or right direction in FIG. 3) in a state where the thermistor 18 is accommodated and held in the accommodation recess 10d. In the range (that is, the PTC element 21 does not come into contact with the housing recess 10d), the projections 22b and 23b project so as to come into contact with the housing recess 10d. The projecting portions 22b and 23b of the present embodiment are portions corresponding to the bottom portion 10e of the housing recess 10d, and are paired with the tip in the direction in which the thermistor 18 is inserted into the housing recess 10d (the contact-side end portion during installation). Is formed. The plate-like conductive plates 22 and 23 have terminal portions 22c and 23c that protrude along the plane (upward in FIG. 3) from the sandwiching portions 22a and 23a, respectively. The terminal portions 22c and 23c protrude from different (left and right in FIG. 3) positions of the sandwiching portions 22a and 23a (portions corresponding to the outside of the housing recess 10d). The thermistor 18 is inserted and held in the receiving recess 10d along the plane. In this state, the projecting portions 22b and 23b are brought into contact with the bottom portion 10e of the housing recess 10d, and the terminal portions 22c and 23c are disposed outside the housing recess 10d. The power supply terminal 16 is electrically connected to one terminal portion 22c, and the pigtail 12a extending from the power supply brush 12 is electrically connected to the other terminal portion 23c.

Next, a method for manufacturing the thermistor 18 configured as described above will be described with reference to FIG.
First, the PTC element 21 and the pair of plate-like conductive plates 22 and 23 are prepared.

  Then, in the fixing step, as shown in FIG. 4, the plate-like conductive plate 23, the solder, the PTC element 21, the solder, and the plate-like conductive plate 22 are laminated and arranged in this order in the recess 31 a of the mold 31. Then, the sandwiching portions 22a and 23a and the PTC element 21 are fixed by soldering (melted and solidified solder).

  Here, the mold 31 avoids the protrusions 22b and 23b, and is a portion corresponding to the bottom 10e of the housing recess 10d in the sandwiching portions 22a and 23a, and the tip in the direction in which the thermistor 18 is inserted into the housing recess 10d. A projecting portion 31b projecting to the (abutting side end during installation) side is provided, and the projecting portion 31b is disposed so as to avoid the projecting portions 22b and 23b, and the fixing step is performed.

  The mold 31 (the concave portion 31a) has a clearance S between the plate-like conductive plates 22 and 23 and the plate-like conductive plates 22 and 23 in a state where the plate-like conductive plates 22 and 23 are accommodated when viewed from the plane orthogonal direction of the plate-like conductive plates 22 and 23. Is set to have. Further, the convex portion 31b is set so as to protrude larger than the gap S. 3 and 4, the thermistor manufactured by the above-described manufacturing method, in which the PTC element 21 slightly protrudes from the portion corresponding to the bottom portion 10 e of the housing recess 10 d around the holding portions 22 a and 23 a when viewed from the plane orthogonal direction. 18 is illustrated.

Next, characteristic effects of the above embodiment will be described below.
(1) Since the plate-like conductive plates 22 and 23 have projecting portions 22b and 23b that project from part of the contact-side end portions around the sandwiching portions 22a and 23a when viewed from the plane orthogonal direction, Even when the PTC element 21 slightly protrudes from the contact-side end portion around the sandwiching portions 22a and 23a when viewed from the plane orthogonal direction, the protruding portion is formed when the thermistor 18 is installed in the installation portion (accommodating recess 10d). It is prevented that PTC element 21 will contact | abut to an installation part because 22b and 23b contact | abut to an installation part previously. Therefore, the PTC element 21 is prevented from being deformed, and the solder protruding from the plane of the PTC element 21 is crushed to directly connect the pair of plate-like conductive plates 22 and 23 (without passing through the PTC element 21). The state is prevented.

  Specifically, in the present embodiment, the protrusions 22b and 23b are formed at the front end in the direction in which the thermistor 18 is inserted into the housing recess 10d as the installation portion, so that the thermistor element is placed on the contact side end during installation. Even if the thermistor 18 slightly protrudes from the tip, which is a portion, when the thermistor 18 is installed (accommodated and held) in the accommodating recess 10d, the projecting portions 22b and 23b come into contact with the bottom 10e of the accommodating recess 10d first. This prevents the PTC element 21 from coming into contact with the bottom 10e. As described above, when the thermistor 18 is inserted and held in the receiving recess 10d, the tip end side in the insertion direction of the thermistor 18 is easily pressed against the bottom 10e of the receiving recess 10d. 21 is prevented from coming into contact with the bottom 10e. Therefore, the PTC element 21 is more effectively prevented from being deformed, and the solder protruding from the plane of the PTC element 21 is crushed so that the pair of plate-like conductive plates 22 and 23 are directly connected (the PTC element 21 is removed). It is more effectively prevented from being in a conductive state.

  (2) The mold 31 has a protruding portion 31b that protrudes toward the tip (abutting side end during installation) side in the direction in which the thermistor 18 is inserted into the accommodating recess 10d in the holding portions 22a and 23a while avoiding the protruding portions 22b and 23b. Since the protrusion 31b is disposed so as to avoid the protrusions 22b and 23b and a fixing process is performed, the PTC element 21 protrudes from the protrusions 22b and 23b by the protrusion 31b during manufacturing. Can be prevented. Therefore, the thermistor 18 which can acquire the said effect (1) can be manufactured easily.

  (3) The mold 31 (its recess 31a) has a gap S between the plate-like conductive plates 22 and 23 and the plate-like conductive plates 22 and 23 in a state where the plate-like conductive plates 22 and 23 are accommodated when viewed from the plane orthogonal direction of the plate-like conductive plates 22 and 23. Therefore, the work (automation) of accommodating the plate-like conductive plates 22 and 23 in the mold 31 (the concave portion 31a) is facilitated. Moreover, since the convex part 31b is set so as to protrude larger than the gap S, it is possible to prevent the PTC element 21 from protruding from the protruding parts 22b and 23b during manufacturing.

The above embodiment may be modified as follows.
-In above-mentioned embodiment, although protrusion part 22b, 23b was formed in the front-end | tip of clamping part 22a, 23a of the direction which inserts the thermistor 18 in the accommodation recessed part 10d, it is not limited to this, When installing the thermistor 18 As long as it protrudes from a part of the end portion that may come into contact (the end portion on the contact side during installation), it may be formed in another portion.

  For example, it may be changed as shown in FIGS. The plate-like conductive plates 22 and 23 of the thermistor 18 in this example (see FIGS. 5 and 6) are orthogonal to the direction in which the thermistor 18 is inserted into the accommodating recess 10d in addition to the protrusions 22b and 23b of the above embodiment. A pair of projecting portions 22d and 23d are also provided on both side portions of the sandwiching portions 22a and 23a.

  Further, when the thermistor 18 (see FIG. 5) is manufactured, as shown in FIG. 6, the mold 31 avoids the projecting portions 22d and 23d in addition to the projecting portion 31b, and holds the sandwiching portions 22a and 23a. The convex part 31c which protrudes in the edge part side corresponding to the inner side part 10f of the accommodation recessed part 10d in is provided, and the convex part 31c is arrange | positioned so that protrusion part 22d, 23d may be avoided, and the said fixing process is performed. 5 and 6, the PTC element 21 is manufactured by the above-described manufacturing method, and the PTC element 21 is seen from the portion corresponding to the bottom portion 10 e and the inner portion 10 f of the housing recessed portion 10 d around the sandwiching portions 22 a and 23 a as viewed from the plane orthogonal direction. A slightly protruding thermistor 18 is shown.

  Even if it does in this way, the effect similar to the effect of the said embodiment can be acquired. In addition, since the projecting portions 22d and 23d are further formed on the side portions orthogonal to the direction in which the thermistor 18 is inserted into the housing recess 10d, the side where the PTC element 21 is the abutting side end during installation is produced. Even if it protrudes slightly from the portion, the protrusions 22d and 23d first come into contact with the inner portion 10f of the housing recess 10d when installed (accommodated and held) in the housing recess 10d as the installation portion, so that the PTC element 21 is The contact with the inner portion 10f is prevented. Therefore, the PTC element 21 is further prevented from being deformed, and the solder protruding from the plane of the PTC element 21 is crushed to directly connect the pair of plate-like conductive plates 22 and 23 (without passing through the PTC element 21). It is further prevented that the conductive state is established.

  -In above-mentioned embodiment, although protrusion part 22b, 23b (22d, 23d) shall have plate-shaped electrically-conductive board 22, 23, it is not limited to this, An accommodation recessed part is a protrusion with the substantially the same function. You may make it have a part.

  For example, as shown in FIGS. 7 to 9, the housing recess 10 d is viewed from the direction along the plane in a state where the thermistor 101 is housed and held in the housing recess 10 d (see FIGS. 8 and 9). You may make it have the protrusion parts 10g and 10h which protruded so that it may contact | abut with the plate-shaped electrically-conductive board 106 in the range except the element 104 (PTC element 21). The thermistor 101 of this example is a conventional one that does not have the protrusions 22b and 23b (22d and 23d) of the above embodiment, and is the same as that described in the background art (see FIG. 10). A sign is attached.

  Specifically, one protrusion 10g in this example is formed in a pair on the bottom 10e (in the housing recess 10d) in the direction of inserting the thermistor 101 into the housing recess 10d. As shown in FIG. 9, the thermistor element 104 (PTC element) 21) (ie, a position where it does not come into contact with the PTC element 21), it protrudes so as to come into contact with only one plate-like conductive plate 106 (the tip of the holding portion 106a).

  Further, the other protruding portion 10h in this example is formed on the inner portion 10f (of the receiving recess 10d) in the direction orthogonal to the direction in which the thermistor 101 is inserted into the receiving recess 10d. As shown in FIG. 8, the thermistor element 104 ( In a range excluding the PTC element 21 (that is, a position where the PTC element 21 does not come into contact), it protrudes so as to come into contact with only one plate-like conductive plate 106 (side portion of the sandwiching portion 106a).

  Even if it does in this way, even if the thermistor element 104 protrudes a little from the circumference | surroundings of clamping part 105a, 106a seeing from a plane orthogonal direction at the time of manufacture, protrusion part 10g, 10h contacts plate-shaped electrically conductive board 106 previously. The thermistor element 104 is prevented from coming into contact with the housing recess 10d (the inner surface thereof). Therefore, the thermistor element 104 is prevented from being deformed, and the solder protruding from the plane of the thermistor element 104 is crushed so that the pair of plate-like conductive plates 105 and 106 are directly connected (not via the thermistor element 104). The state is prevented.

  Specifically, in this example, since one protrusion 10g is formed on the bottom 10e (of the housing recess 10d) in the direction in which the thermistor 101 is inserted into the housing recess 10d, the thermistor element 104 is sandwiched between the sandwiching portions 105a and 106a. 7 and 9, even when the thermistor 101 is inserted (accommodated and held) into the accommodating recess 10 d, the protruding portion 10 g is plate-like conductive. By contacting (supporting) the tip of the plate 106 first, it is possible to prevent the thermistor element 104 from contacting the bottom 10e. When the thermistor 101 is inserted and held in the receiving recess 10d as described above, the tip end side in the insertion direction of the thermistor 101 is easily pressed against the bottom 10e of the receiving recess 10d. It is possible to prevent 104 from coming into contact with the bottom 10e. Accordingly, the thermistor element 104 is more effectively prevented from being deformed, and the solder protruding from the plane of the thermistor element 104 is crushed to directly connect the pair of plate-like conductive plates 105 and 106 (thermistor element 104 It is more effectively prevented from being in a conductive state.

  Further, in this example, the other protruding portion 10h is further formed in the inner portion 10f (of the receiving recess 10d) in the direction orthogonal to the direction in which the thermistor 101 is inserted into the receiving recess 10d, so that the thermistor element 104 is sandwiched during manufacture. Even if it protrudes slightly from the side portions (ends in the direction perpendicular to the insertion direction) of the portions 105a and 106a, when the thermistor 101 is inserted (accommodated and held) in the accommodating recess 10d, the protruding portion 10h is located on the side portion of the plate-like conductive plate 106. By abutting first, the thermistor element 104 is prevented from abutting on the inner portion 10f. Therefore, the thermistor element 104 is further prevented from being deformed, and the solder protruding from the plane of the thermistor element 104 is crushed to directly connect the pair of plate-like conductive plates 105 and 106 (without passing through the thermistor element 104). It is further prevented that the conductive state is established.

  In this example (see FIGS. 7 to 9), the protruding portions 10g and 10h are provided so as to contact only one plate-like conductive plate 106, but of course, the other plate-like conductive plate 105 also contacts. (In FIG. 8, also on the lower side). Of course, this example may be combined with the above-described embodiment. For example, the plate-like conductive plates 22 and 23 having the protruding portions 22b and 23b of the above-described embodiment and the protruding portion 10h on the inner portion 10f. You may combine with the accommodation recessed part 10d which it had.

  In the above embodiment, the thermistor 18 is housed and held in the housing recess 10d. However, the thermistor 18 is not limited to this and may be installed in the end bracket 10 with another structure. Even in this case, a projecting portion that protrudes from a part of an end portion that may come into contact with the end bracket 10 during installation (a contact-side end portion during installation) may be provided in the sandwiching portion.

In the above embodiment, the thermistor element is the PTC element 21, but of course, the thermistor element may be changed to another thermistor element whose electric resistance greatly changes with temperature change.
-You may change the shape and number of protrusion part 22b, 23b (22d, 23d, 10g, 10h) of the said embodiment into another shape and other number.

  -In above-mentioned embodiment, although protrusion part 22b, 23b (22d, 23d) was provided in each clamping part 22a, 23a of a pair of plate-shaped electroconductive board 22, 23, it is not limited to this, For example, one side It may be provided only in the sandwiching portion 22a of the plate-like conductive plate 22 (the protrusion 23b (23d) of the sandwiching portion 23a of the other plate-like conductive plate 23 may be deleted). In this way, material costs can be reduced.

  In the above embodiment, solder is used as the conductive connection member. However, if the thermistor element (PTC element 21) and the plate-like conductive plates 22 and 23 can be similarly connected and fixed, the conductive connection member can be changed to another conductive connection member. May be.

  In the above embodiment, the motor 1 is used as a drive source for the power seat device of the vehicle. However, the motor 1 may be used as a drive source for other devices. Of course, the thermistor 18 may be embodied as a thermistor provided in a device other than the motor.

The technical idea that can be grasped from the above embodiments will be described below together with the effects thereof.
(B) pre-Symbol type is set to have a plate-like conductive plate and a gap in a state of accommodating the plate-shaped conductive plate when viewed from a plane perpendicular to the direction of the plate-shaped conductive plate, the convex portion, the it characterized by being set so as to protrude greater than the gap.

  According to the invention, the mold is set so as to have a gap with the plate-like conductive plate in a state in which the plate-like conductive plate is accommodated when viewed from the plane orthogonal direction of the plate-like conductive plate. Work (automation) accommodated in the mold becomes easy. In addition, since the convex portion is set so as to protrude larger than the gap, it is possible to prevent the thermistor element from protruding from the protruding portion during manufacturing.

Sectional drawing of the motor in this Embodiment. The top view of the end bracket in this Embodiment. Explanatory drawing for demonstrating the thermistor and the accommodation recessed part in this Embodiment. Explanatory drawing for demonstrating the manufacturing method of the thermistor in this Embodiment. Explanatory drawing for demonstrating the thermistor and accommodation recessed part in another example. Explanatory drawing for demonstrating the manufacturing method of the thermistor in another example. Explanatory drawing for demonstrating the thermistor and accommodation recessed part in another example. The top view for demonstrating the thermistor and the accommodation recessed part in another example. The partial cross section for demonstrating the thermistor and the accommodation recessed part in another example. Explanatory drawing for demonstrating the thermistor and accommodation recessed part in background art. Explanatory drawing for demonstrating the manufacturing method of the thermistor in background art.

Explanation of symbols

  4 ... armature, 10 ... end bracket (accommodating holding member), 10d ... accommodating recess, 10e ... bottom, 10f ... inside, 10g, 10h, 22b, 23b, 22d, 23d ... projecting part, 16 ... power feeding terminal, 18, 101 ... thermistor, 21 ... PTC element (thermistor element), 22, 23, 105, 106 ... plate-like conductive plate, 22a, 23a, 105a, 106a ... clamping part, 31 ... mold, 31b, 31c ... convex part, 104: Thermistor element.

Claims (3)

A plate-like thermistor element whose electrical resistance changes greatly with respect to temperature changes, and a conductive connecting member on the thermistor element plane so that the thermistor element is sandwiched by a clamping portion having substantially the same shape as the plane of the thermistor element. A thermistor electrically connected to a power supply terminal for supplying power to the armature;
A motor comprising: a housing holding member having a housing concave portion in which the thermistor is inserted along the plane to house and hold the thermistor;
The plate-like conductive plate has a protruding portion formed so as to protrude toward the bottom side of the receiving recess at the tip of the plate-like conductive plate in the direction in which the thermistor is inserted into the receiving recess, The thermistor element is configured not to protrude to the bottom side of the housing recess from the protrusion.
The motor according to claim 1, wherein the protruding portion is in contact with a bottom portion of the housing recess in a state where the thermistor is housed and held in the housing recess . The motor according to claim 1 ,
The plate-shaped conductive plate, said housing recess in said housing formed side side projection so as to protrude inward side of the recess facing the said side portion on the side of the direction perpendicular to the direction of inserting the thermistor The thermistor is configured so that the thermistor element does not protrude toward the inner side of the housing recess facing the side-side protruding portion than the side-side protruding portion. motor. A plate-like thermistor element whose electrical resistance changes greatly with respect to temperature changes;
A pair of plate-like conductive plates having a sandwiching portion having substantially the same shape as the plane of the thermistor element, and being fixed to the plane of the thermistor element by a conductive connecting member so as to sandwich the thermistor element at the sandwiching portion; With
The plate-like conductive plate is a method of manufacturing a thermistor having a protruding portion that protrudes from a part of an abutting side end portion at the time of installation around the clamping portion as seen from a plane orthogonal direction,
In order to produce a pre-Symbol thermistor, in the mold, the plate-like conductive plate, a conductive connection member, said thermistor element, conductive connection member, said plate-shaped conductive plate is stacked in this order, and heated in this state Bei give a fixing step for fixing the said thermistor element and said clamping portion with a conductive connecting member Te,
The mold is provided with a protrusion that protrudes toward the abutting side end during installation, avoiding the protrusion, and the fixing step is performed by arranging the protrusion so as to avoid the protrusion. Thermistor manufacturing method.

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