JP2012186237A - Solenoid - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a solenoid having a frame-like york, and having a structure capable of reducing manufacturing costs by improving assemblability.SOLUTION: An opening 23 and an opening 28 are formed on a first york member 20, and a locking part 32 and a locking part 33 are formed on a second york member 30. Therefore, the second york member can be locked by pushing the second york member 30 between a bottom plate part 21 and a top plate part 26 of the first york member 20. Accordingly, a caulking operation can be omitted, so as to reduce the number of manhours required for assembling the solenoid. Also, because the york is formed of a soft magnetic material, a top side portion and a bottom side portion of the first york member 20 can be enlarged by hands, and there is no need for specially modifying production facility.

Description

  The present invention relates to a solenoid, and more particularly to a solenoid having a frame-like yoke.

  Some solenoids have yokes that surround four sides of the front side, top side, back side, and bottom side of the bobbin, and are also called open frame solenoids. A solenoid having such a yoke is easy to process each member and has a relatively small number of parts and is relatively easy to assemble. Therefore, various types of office equipment such as copiers and printers, amusement machines, machine tools, etc. Widely used in products. Furthermore, it is not uncommon for several devices to be mounted on one device. Therefore, the manufacturing cost is required to be reduced as compared with other types of solenoids. In general, a reduction in manufacturing cost is often achieved by reducing the number of parts. However, when the structure is simplified, a secondary problem may arise regarding the reliability and assembly of the solenoid.

  Below, the prior art of the solenoid which has a frame-shaped yoke is demonstrated. FIG. 13 is an exploded perspective view showing the structure of a solenoid according to the prior art. In FIG. 12, 18 is a solenoid, 19 is a base, 40 is a yoke, 41 and 42 are notched portions, 43 is a coil, 44 is a hollow portion, 45 is a plate member, 46 and 47 are arm portions, 48 is a movable plunger, 49 is a front-end | tip part.

  FIG. 13 shows a solenoid disclosed in Japanese Patent Application Laid-Open No. 2004-314661. In this prior art, in the solenoid 18, the base 19 is provided integrally with the opening of the yoke 40 in advance. When assembling the solenoid 18, the coil 43 is arranged so that the base 19 is inserted into the hollow portion 44, and the plate member 45 is fitted into the cutout portions 41 and 42 of the yoke 40 so that the arm portions 46 and 47 are fitted. In addition, the movable plunger 48 is inserted into the hollow portion 44 of the base 19 of the coil 43. Finally, when the arm portions 46 and 47 of the plate member 45 are caulked and fixed, the yoke 40 and the plate member 45 become one yoke.

  Therefore, in the solenoid 18 according to this prior art, since the base 19 is formed integrally with the plate member 45, it is not necessary to form the base 19 and the plate member 45 separately, and the base 19 is fitted into the yoke 40. Man-hours corresponding to work can be reduced.

  However, in the above configuration, the work of caulking the arm portions 46 and 47 with each component assembled is left. If the arm portions 46 and 47 are caulked, the arrangement and orientation of the parts cannot be corrected after the fact, and therefore the caulking work needs to proceed carefully so as not to cause a deviation in the arrangement and orientation of the assembled parts. The man-hour for the caulking work is considerably larger than the man-hour for the work for fitting the base 19 into the yoke 40, so that the next problem is to eliminate the caulking work.

JP-A-2004-314661

  In order to solve the above-described problems, an object of the present invention is to provide a solenoid having a structure that can reduce the manufacturing cost by improving assemblability in a solenoid having a frame-shaped yoke.

  The invention according to claim 1 includes a bobbin formed in a substantially cylindrical shape, a plunger partially or entirely inserted in the bobbin so as to be slidable, and a yoke provided so as to surround the bobbin. The yoke is provided so as to surround the upper surface side and the bottom surface side of the bobbin, and either the back surface side or the front surface side, and the upper surface side and the bottom surface side portion of the bobbin. A first yoke member having an opening formed in the vicinity of the front end and a side of the bobbin that is not surrounded by the first yoke member, and a protrusion is formed on each of the upper end surface and the lower end surface. And each of the protrusions includes a second yoke member that is engaged with the opening on the upper surface side of the first yoke member and the opening on the bottom surface portion, respectively. 1 of the yoke member An opening into which the plunger is inserted is formed at the center of one of the portion surrounding either the back side or the front side of the bin and the second yoke member. This is a featured solenoid.

  According to a second aspect of the present invention, in the first aspect of the invention, the first yoke member is a taper in which the tip of the upper surface side portion of the bobbin has an upward slope toward the front end side of the portion. The solenoid is characterized in that a surface and a tapered surface having a downward slope toward the distal end side of the portion are formed at the distal end portion of the bottom surface side portion of the bobbin.

  According to a third aspect of the present invention, in the first or second aspect of the present invention, the second yoke member includes a rear surface side of the bobbin of the first yoke member on the protrusion of the upper end surface. A taper surface that is inclined downward toward a portion surrounding either side of the front surface side, and either one of the rear surface side and the front surface side of the bobbin of the first yoke member on the protrusion on the lower end surface And a tapered surface having an upward slope toward a portion surrounding the portion.

  The invention according to claim 4 is the invention according to any one of claims 1 to 3, wherein the first yoke member includes a portion on an upper surface side of the bobbin and a portion on a bottom surface side of the bobbin. The solenoid is characterized in that the width is locally narrower than the portion surrounding either the back side or the front side of the bobbin.

  The invention according to claim 5 is the invention according to any one of claims 1 to 4, further comprising a base partially inserted into the bobbin, and the first yoke. A part of the base at the center of the part of the member surrounding either the back side or the front side of the bobbin and the second yoke member where the plunger is not inserted. The solenoid according to any one of claims 1 to 4, wherein an opening into which is inserted is formed.

  According to the first aspect of the present invention, the upper end surface of the second yoke member is formed in the opening formed in the vicinity of the front end portion of the upper surface portion and the bottom surface portion of the first yoke member. Since the protrusion formed on the lower end surface is locked, there is no need to caulk and fix the second yoke member to the first yoke member. Therefore, the caulking work can be omitted, and the man-hours required for assembling the solenoid can be reduced. Further, since the yoke is made of a soft magnetic material except for a few special purpose solenoids, the upper surface portion and the bottom surface portion of the first yoke member can be manually expanded. There is no need to make any special modifications to the production equipment.

  According to the second aspect of the present invention, the first yoke member has a tapered surface that is inclined upward toward the distal end side of the portion on the upper surface side of the bobbin, and a portion on the bottom surface side of the bobbin. Since the tapered surface is formed on the distal end portion so as to descend toward the distal end side of the portion, when the second yoke member is pushed between the upper surface portion and the bottom surface portion of the first yoke member, The projections formed on the upper end surface and the lower end surface of the second yoke member are formed in the vicinity of the front side end portions of the upper surface side portion and the bottom surface side portion while sliding on the tapered surfaces. Move towards the department. Therefore, the second yoke member can be locked to the opening by pushing the second yoke member between the upper surface portion and the bottom surface portion of the first yoke member. As a result, it can be assembled only by hand, and there is no need to make any special modifications to the production equipment.

  According to the third aspect of the present invention, the second yoke member descends toward the portion surrounding either the back side or the front side of the bobbin of the first yoke member at the protrusion on the upper end surface. A tapered surface that forms a gradient, and a tapered surface that forms an upward gradient toward the portion surrounding either the back side or the front side of the bobbin of the first yoke member are formed at the tip of the bottom side portion of the bobbin. Therefore, when the second yoke member is pushed between the portion on the upper surface side of the bobbin of the first yoke member and the portion on the bottom surface side of the bobbin, the taper surfaces of these protrusions are the bobbin of the first yoke member. The upper surface side bobbin portion and the bottom surface side portion are in sliding contact with each other and move toward the opening formed in the vicinity of the front surface side end portion of the upper surface side portion and the bottom surface side portion. Therefore, the second yoke member can be locked to the opening by pushing the second yoke member between the upper surface portion and the bottom surface portion of the first yoke member. As a result, it can be assembled only by hand, and there is no need to make any special modifications to the production equipment.

  According to the fourth aspect of the present invention, in the first yoke member, either one or both of the upper surface side portion of the bobbin and the lower surface side portion of the bobbin is either the back surface side or the front surface side of the bobbin. Since the width is locally narrower than the portion surrounding that side, coil lead wires, connectors, rectifying diodes, and the like can be arranged in the space beside the narrow portion. Therefore, it is not necessary to provide an opening for the coil lead wire in the yoke, and assemblability can be improved. As a result, the cost concerning manufacture can be reduced.

  According to the fifth aspect of the present invention, the plunger is inserted among the second yoke member and the portion of the first yoke member surrounding either the back side or the front side of the bobbin. Since a part of the base is inserted into the central opening that is not, the base can be mounted without caulking or bonding the base or the yoke.

It is a perspective view which shows the yoke of the solenoid which concerns on the 1st Embodiment of this invention. It is a figure which shows the 1st yoke member of the solenoid which concerns on the 1st Embodiment of this invention, (A) is a right view, (B) is a top view, (C) is a front view. It is a figure which shows the 2nd yoke member of the solenoid which concerns on the 1st Embodiment of this invention, (A) is a front surface, (B) is a top view, (C) is a right side surface. It is a perspective view (1) which shows the assembly procedure of the yoke of the solenoid which concerns on the 1st Embodiment of this invention, (A) is the state before an assembly, (B) spreads the front end side of a 1st yoke member. It is in the state. It is a perspective view (1) which shows the assembly procedure of the yoke of the solenoid which concerns on the 1st Embodiment of this invention, (C) is the state which pushed in the 2nd yoke member, (D) is the state which completed the assembly. is there. It is a perspective view which shows the solenoid which concerns on the 1st Embodiment of this invention, (A) is a perspective view of the front side, (B) is a perspective view of the back side. It is a perspective view which shows the deformation | transformation of the solenoid which concerns on the 1st Embodiment of this invention. It is a perspective view which shows the yoke of the solenoid which concerns on the 2nd Embodiment of this invention, (A) is the state before an assembly, (B) is the state which has pushed in the 2nd yoke member. It is a figure which shows the 1st yoke member of the solenoid which concerns on the 2nd Embodiment of this invention, (A) is a right view, (B) is a top view, (C) is a front view. It is a perspective view which shows the yoke of the solenoid which concerns on the 3rd Embodiment of this invention, (A) is the state before an assembly, (B) is the state which has pushed in the 2nd yoke member. It is a figure which shows the 2nd yoke member of the solenoid which concerns on the 3rd Embodiment of this invention, (A) is a front view, (B) is a top view, (C) is a right side surface. It is a perspective view which shows the solenoid which concerns on the 4th Embodiment of this invention, (A) is a perspective view of a 1st yoke member, (B) is a perspective view of a solenoid. It is a disassembled perspective view which shows the structure of the solenoid which concerns on a prior art.

  First, the solenoid yoke according to the first embodiment of the present invention will be described. FIG. 1 is a perspective view showing a yoke of a solenoid according to the first embodiment of the present invention. In FIG. 1, 11 is a yoke, 20 is a first yoke member, 21 is a bottom plate portion, 22 is a narrow portion, 24 is a back plate portion, 25 is an opening, 26 is a top plate portion, 27 is a narrow portion, Reference numeral 28 denotes an opening, 30 denotes a second yoke member, 31 denotes a main body, and 33, 34, and 35 denote openings. 2A and 2B are views showing the first yoke member of the solenoid according to the first embodiment of the present invention, where FIG. 2A is a right side surface, FIG. 2B is a plan view, and FIG. 2C is a front view. It is. In FIG. 2, reference numeral 23 denotes an opening, and the other reference numerals are the same as those in FIG. 3 is a view showing the second yoke member of the solenoid according to the first embodiment of the present invention, where (A) is a front view, (B) is a plan view, and (C) is a right side view. is there. In FIG. 3, reference numerals 32 and 33 denote locking portions, and other reference numerals are the same as those in FIG.

  As shown in FIG. 1, the yoke 11 of the solenoid according to the first embodiment of the present invention is used as a so-called open frame solenoid in which the left and right sides of the solenoid are opened, and the first yoke member 20 is used. The second yoke member 30 constitutes a frame-shaped yoke. Moreover, the yoke 11 comprises a magnetic circuit with the base and plunger which are mentioned later. In this magnetic circuit, the yoke 11 surrounds the periphery of the coil and the bobbin, thereby capturing the magnetic flux generated around the coil when the coil is energized and changing it into a driving force of the plunger. As shown in FIG. 2, the first yoke member 20 is made of a soft magnetic material, is formed in a substantially U-shaped plate shape, and includes a bottom plate portion 21, a back plate portion 24, and a top plate portion 26. ing. The first yoke member 20 is preferably formed by pressing a metal plate, that is, formed from one metal plate, but may be formed by connecting three metal pieces by electric welding. Good.

  The bottom plate portion 21 is disposed on the bottom surface side of the bobbin formed in a substantially cylindrical shape, and is formed in a substantially plate shape so as to extend in the horizontal direction. Further, as can be seen from FIGS. 2B and 2C, the distal end side of the bottom plate portion 21 is a narrow width portion 22 that is narrower than the proximal end side, and is stepped on both the left and right sides with respect to the proximal end side. Is to be formed. The base end portion of the bottom plate portion 21 is continuous with the back plate portion 24. The narrow width portion 22 is a part of the bottom plate portion 21 and is formed for the purpose of arranging coil lead wires, connectors, rectifying diodes, and the like in the spaces on both sides thereof. In addition, since steps are formed on both the left and right sides with respect to the base end side, coil lead wires, connectors, rectifying diodes, and the like can be arranged on either the left or right side. . Therefore, when the solenoid according to this embodiment is mounted on an office device or the like, even if the surrounding mechanical elements and electronic components are arranged close to the open surface not surrounded by the yoke 11, the coil lead wire There is an advantage that the work of connecting the terminal to the terminal can be easily performed. The narrow portion 22 may be formed locally depending on the arrangement of the coil lead wire, connector, rectifier diode, etc., and may be formed on either the left or right side, for example. The narrow part may be formed in the middle part of the bottom plate part 21, and the formation positions of the left and right narrow parts may be shifted. On the contrary, it is also possible to make the same width as the base end portion of the bottom plate portion 21 up to the distal end portion without forming the narrow width portion at all.

  Further, a substantially rectangular opening 23 is formed in a portion near the tip of the narrow width portion 22. The opening 23 is for locking the second yoke member 30 shown in FIG. That is, in the prior art, the yoke member corresponding to the second yoke member 30 is fixed by caulking after being mounted on the substantially U-shaped yoke member corresponding to the first yoke member 20. In the solenoid according to the embodiment, the second yoke member 30 is fixed by being locked to the opening 23. Further, as will be described later, the second yoke member 30 is pressed against the distal end side of the narrow width portion 22 by the elastic force of the resin bobbin, so that it does not come off due to vibration generated in the office equipment to be mounted. .

  The back plate portion 24 stands upright from the bottom plate portion 21, and the upper end portion is continuous with the top plate portion 26. Further, an opening 25 for inserting and holding a base or a plunger to be described later is formed at the center of the back plate portion 24. That is, when the base is disposed on the back plate portion 24 side, the protruding portion of the base is inserted into the opening 25. The diameter of the opening 25 is slightly larger than the diameter of the protruding portion of the base so that the base does not rattle. Moreover, when arrange | positioning a plunger to the backplate part 24 side, the part which protruded from the bobbin of the plunger is inserted in the state which can be slid with respect to the opening part 25. FIG.

  The top plate portion 26 is formed in a substantially plate shape so as to extend in parallel with the bottom plate portion 21 from the upper end portion of the back plate portion 24. Moreover, the front end side of the upper surface plate portion 26 is formed as a narrow width portion 27 having a narrower width than the base end side, and a step is formed on both the left and right sides with respect to the base end side. Further, a substantially rectangular opening 28 is formed in a portion near the tip of the narrow portion 27. The opening 28 is formed in a substantially rectangular shape like the opening 23 and has a role of locking the second yoke member 30. As shown in FIG. 2B, the length and width of the upper surface plate portion 26 and the bottom surface plate portion 21 are the same, and the length and width of the narrow width portion 22 and the narrow width portion 27 are also the same. is there. Furthermore, the formation site, shape, and size of the opening 23 and the opening 28 are the same. Therefore, since the upper surface plate portion 26 performs the same function as the bottom surface plate portion 21, the first yoke member 20 has no top-to-bottom direction. When assembling a small open frame solenoid, the work burden for recognizing the top and bottom of a small yoke member is relatively large, but the solenoid according to this embodiment does not cause such a burden. Of course, the top plate 26 and the bottom plate 21 may have different shapes and lengths depending on the device to be mounted.

  As shown in FIG. 3, the second yoke member 30 has a main body portion 31 formed in a substantially rectangular plate shape, and is formed by pressing a metal plate made of a soft magnetic material. The length from the upper end surface to the lower end surface of the main body 31 is the same as the gap between the top surface plate portion 26 and the bottom surface plate portion 21. This is because if a gap is formed between the first yoke member 20 and the second yoke member 30 when the coil is energized, the magnetic flux leaks from this gap. Further, the locking portion 32 and the locking portion 33 protrude from the lower end surface and the upper end surface of the main body portion 31. The locking part 32 is locked to the opening 23 of the bottom plate part 21. Similarly, the locking portion 33 is locked to the opening 28 of the upper surface plate portion 26. When the locking portion 32 and the locking portion 33 are locked to the opening 23 and the opening 28, the state shown in FIG. In addition, the height of the latching | locking part 32 and the latching | locking part 33 shall be shorter than the plate | board thickness of the 1st yoke member 20 so that it may not protrude from the opening part 23 and the opening part 28, when it latches. . This is because when the bottom plate portion 21 or the top plate portion 26 is attached to a mounting surface of a device on which the bottom plate portion 21 or the top plate portion 26 is attached, the protruding portion may interfere with the attachment.

  An opening 34 is formed at the center of the second yoke member 30. The opening 34 is for inserting and holding a base or a plunger. The center of the opening 34 and the center of the back plate 24 are set to be the same height from the bottom plate 21 so that the central axis of the plunger does not tilt when the solenoid is assembled. The openings 35 and 36 are for arranging the bobbin at a predetermined position with respect to the yoke 11, and are arranged above and below the opening 34. That is, by fitting the protrusions provided on the bobbin collars into the openings 35 and 36, the bobbin mounting position can be prevented from being displaced in any of the upper, lower, left and right directions.

  Furthermore, the assembly procedure of the yoke 11 will be described. FIGS. 4A and 4B are perspective views (1) showing an assembly procedure of the solenoid yoke according to the first embodiment of the present invention, in which FIG. 4C shows a state in which the second yoke member is pushed in, and FIG. It is in a completed state. The reference numerals used in FIG. 4 are the same as those in FIGS. FIG. 5 is a perspective view (1) showing a procedure for assembling the solenoid yoke according to the first embodiment of the present invention, (C) shows a state in which the second yoke member is pushed in, and (D) shows It is in a state where assembly has been completed. Reference numerals used in FIG. 5 are the same as those in FIG.

  First, as shown in FIG. 4A, the second yoke member 30 is opposed to the front end sides of the bottom plate portion 21 and the top plate portion 26 of the first yoke member 20. Next, as shown in FIG. 4B, the narrow width portion 27 of the first yoke member 20 is expanded by a tool or a hand, and the state is maintained. Further, as shown in FIG. 5C, the second yoke member 30 is moved to a position where the locking portion 32 and the locking portion 33 face the opening 23 and the opening 28, respectively. Then, the tool or hand is released from the narrow portion 27 of the first yoke member 20. Then, as shown in FIG. 5D, the locking portion 32 and the locking portion 33 are locked to the opening 23 and the opening 28. As described above, the solenoid yoke 11 according to this embodiment can assemble the yoke member much more easily than the prior art by caulking.

  Further, a solenoid to which the aforementioned yoke 11 is applied will be described. 6A and 6B are perspective views showing the solenoid according to the first embodiment of the present invention, in which FIG. 6A is a front perspective view and FIG. 6B is a rear perspective view. In FIG. 6, 10 is a solenoid, 12 is a coil, 13 and 14 are collars, 15 is a plunger, 16a and 16b are guide parts, 19 is a base, and other symbols are the same as those in FIG. FIG. 7 is a perspective view showing a modification of the solenoid according to the first embodiment of the present invention. In FIG. 7, reference numeral 24a denotes a front plate portion, and the other reference numerals are the same as those in FIG.

  A solenoid to which the yoke 11 shown in FIG. 1 is applied is shown in FIG. That is, the solenoid 10 has a bobbin around which the coil 12 is wound mounted in a space surrounded by the first yoke member 20 and the second yoke member 30. The bobbin is made of resin and is formed in a substantially cylindrical shape, and has a flange portion 13 and a flange portion 14 at both ends. Further, the bobbin is in a state of being pressed toward the back plate portion 24 side by the second yoke member 30. Therefore, the locking portion 32 and the locking portion 33 of the second yoke member 30 are pressed against the edge of the opening 23 and the opening 28 on the front end side by the elastic force of the bobbin. The plunger 15 is inserted into the opening 34 of the second yoke member 30, and the proximal end side of the plunger 15 is inserted into the bobbin. Further, the guide portion 16 a and the guide portion 16 b formed on the flange portion 14 of the bobbin are fitted into the opening portion 35 and the opening portion 36 of the second yoke member 30. Further, the protruding portion of the base 19 is inserted into the opening 25 of the back plate portion 24. In the solenoid according to this embodiment, the bobbin has a substantially cylindrical shape, but the shape of the bobbin is not limited to this.

  In the solenoid shown in FIG. 6, the plunger and the base can be mounted in the reverse direction. That is, as shown in FIG. 7, in the solenoid 10, the base 19 is inserted into the opening 34 of the second yoke member 30, and the plunger 15 is inserted into the opening 25 of the back plate 24. In the case of this configuration, the side on which the collar portion 13 of the bobbin is located is the front surface of the solenoid 10, and therefore, in FIG. 7, the back plate portion 24 of FIG. 6 is the front plate portion 24a. As described above, in the solenoid yoke 11 according to this embodiment, the arrangement of the plunger and the base can be reversed.

  As described above, the solenoid 10 according to the first embodiment of the present invention is very easy to assemble. The mounted bobbin is sandwiched between the back plate portion 24 and the second yoke member 30 of the first yoke member 20, the base is in the opening portion 25 of the back plate portion 24, and the plunger 15 is in the first position. Since it is inserted into the opening 34 of the two-yoke member 30, even if a slight impact is applied to the solenoid 10, it can be separated from the space surrounded by the first yoke member 20 and the second yoke member 30. Absent. Further, since the second yoke member 30 also has the engaging portion 32 and the engaging portion 33 pressed against the edge of the opening 23 and the opening 28 on the front end side, a slight impact is applied to the solenoid 10. However, the second yoke member 30 is not detached from the first yoke member 20. In addition, since both sides of the narrow portion 22 and the narrow portion 27 can be used for routing the lead wire of the coil, the operation of electrically connecting the solenoid 10 is facilitated. Furthermore, if the narrow portion 22 and the narrow portion 27 of the first yoke member 20 are expanded, the second yoke member 30 is detached, so that the disassembly can be made very easy.

  Furthermore, a solenoid according to a second embodiment of the present invention will be described. FIGS. 8A and 8B are perspective views showing a solenoid yoke according to the second embodiment of the present invention, in which FIG. 8A shows a state before assembly, and FIG. 8B shows a state in which the second yoke member is pushed in. In FIG. 8, 29a and 29b are taper surfaces, and other reference numerals are the same as those in FIG. FIG. 9 is a view showing a first yoke member of a solenoid according to the second embodiment of the present invention, where (A) is a right side surface, (B) is a plan view, and (C) is a front view. It is. The reference numerals used in FIG. 9 are the same as those in FIG.

  In the solenoid 10 according to the second embodiment of the present invention, as shown in FIG. 9, a tapered surface 29 a and a tapered surface 29 b are respectively formed on the narrow portion 22 and the narrow portion 27 of the first yoke member 20. ing. The tapered surface 29 a is formed so as to have a downward slope toward the distal end side of the narrow portion 22 at the distal end portion of the narrow portion 22. The tapered surface 29b is formed so as to have an upward slope toward the distal end side of the narrow portion 27 at the distal end portion of the narrow portion 27. Other configurations are the same as those of the first embodiment. Therefore, the taper surface 29a and the taper surface 29b are opposite to each other so as to spread outward. In FIG. 9, the tapered surfaces 29a and 29b are flat inclined surfaces, but may be formed as curved surfaces.

  Since the solenoid 10 according to this embodiment forms the tapered surfaces 29a and 29b, the number of steps for processing the first yoke member 20 is greater than that of the solenoid 10 according to the first embodiment. However, as shown below, the assembly of the yoke is even simpler. That is, as shown in FIG. 8A, the second yoke member 30 is opposed to the front end sides of the bottom plate portion 21 and the top plate portion 26 of the first yoke member 20. Then, the second yoke member 30 is pressed against the first yoke member 20 as shown in FIG. If it does so, the latching | locking part 32 and the latching | locking part 33 will contact the surface of the taper surface 29a and the taper surface 29b, respectively. If the second yoke member 30 is continuously pressed against the first yoke member 20 as it is, the locking portion 32 and the locking portion 33 are in sliding contact with the surfaces of the tapered surface 29a and the tapered surface 29b, while the first yoke member 20 is in sliding contact. The narrow portion 22 and the narrow portion 27 are gradually pushed and expanded. Finally, the locking part 32 and the locking part 33 enter the opening part 23 and the opening part 28, and are in a state of being locked to the opening part 23 and the opening part 28. Therefore, the yoke member can be assembled very easily only by manual work. Even if only one of the tapered surface 29a and the tapered surface 29b is formed, a certain effect can be obtained.

  Furthermore, a solenoid according to a third embodiment of the present invention will be described. 10A and 10B are perspective views showing a solenoid yoke according to a third embodiment of the present invention, in which FIG. 10A shows a state before assembly, and FIG. 10B shows a state in which the second yoke member is pushed in. In FIG. 10, reference numerals 37a and 37b denote tapered surfaces, and other reference numerals are the same as those in FIG. FIG. 11 is a view showing a second yoke member of the solenoid according to the third embodiment of the present invention, in which (A) is a front view, (B) is a plan view, and (C) is a right side view. is there. Reference numerals used in FIG. 11 are the same as those in FIG.

  As shown in FIG. 11, the solenoid 10 according to this embodiment is tapered to the locking portion 32 and the locking portion 33 of the second yoke member 30, contrary to the solenoid 10 according to the second embodiment. Surfaces 37a and 37b are formed. Therefore, as with the solenoid 10 according to the second embodiment, the assembly of the yoke 11 is further simplified. That is, as shown in FIG. 10A, the second yoke member 30 is opposed to the front end sides of the bottom plate portion 21 and the top plate portion 26 of the first yoke member 20. Then, the second yoke member 30 is pressed against the first yoke member 20 as shown in FIG. If it does so, the front-end | tip part of the bottom face board part 21 and the upper surface board part 26 will contact the surface of the taper surface 37a and the taper surface 37b. If the second yoke member 30 is kept pressed against the first yoke member 20 as it is, the tip portions of the bottom plate portion 21 and the top plate portion 26 slidably contact the surface of the tapered surface 37a and the tapered surface 37b. The narrow portion 22 and the narrow portion 27 of the yoke member 20 are gradually pushed and expanded. Finally, the locking part 32 and the locking part 33 enter the opening part 23 and the opening part 28, and are in a state of being locked to the opening part 23 and the opening part 28. Other configurations are the same as those of the first embodiment. Therefore, the yoke member can be assembled very easily only by manual work. Even if only one of the tapered surface 37a and the tapered surface 37b is formed, a certain effect can be obtained. In order to further simplify the assembly of the yoke 11, the tapered surfaces 29a and 29b in the solenoid according to the second embodiment of the present invention and the tapered surface 37a in the solenoid according to the third embodiment of the present invention. And 37b may be formed. In addition, one tapered surface of each embodiment may be formed.

  Furthermore, a solenoid according to a fourth embodiment of the present invention will be described. 12A and 12B are perspective views showing a solenoid according to the fourth embodiment of the present invention. FIG. 12A is a perspective view of a first yoke member, and FIG. 12B is a perspective view of the solenoid. In FIG. 12, 17a and 17b are guide portions, 38 and 39 are openings, and other reference numerals are the same as those in FIG.

  In the solenoid 10 according to this embodiment, in order to reduce the number of parts and reduce the manufacturing cost, the above-described yoke is applied to the solenoid without the base. That is, as shown in FIG. 12A, the openings 38 and 39 are formed so as to be arranged vertically in the back plate portion 24 of the first yoke member 20. On the contrary, the opening 25 is not formed. Further, as shown in FIG. 12 (B), guide portions 17a and 17b are formed on the collar portion 13 of the bobbin. In the assembled state of the solenoid 10, bobbin guide portions 17 a and 17 b are inserted into the opening 38 and the opening 39. Further, the opening 25 in FIG. 1 is not formed. Other configurations are the same as those of the first embodiment. Although not shown, the base is not inserted into the hollow portion of the bobbin on the back plate portion 24 side, and the base end portion of the plunger 15 is in contact with the back plate portion 24 or a spacer interposed therebetween. It is the structure which touches. Therefore, in this embodiment, the back plate portion 24 of the first yoke member 20 is structured to support the bobbin instead of the base. Thus, the present invention can be preferably applied to a solenoid that omits the base. Further, although the base is provided, this embodiment can be applied to a configuration in which all or most of the base is inserted into the hollow portion of the bobbin. Furthermore, in the back plate part 24 of the first yoke member 20, both the opening 25 and the openings 38 and 39 may be provided.

  As described above, in the solenoid 10 according to the first embodiment of the present invention, the opening portion 23 and the opening portion 28 are formed in the first yoke member 20, and the locking portion 32 is formed in the second yoke member 30. Since the second yoke member 30 is pushed between the bottom plate portion 21 and the top plate portion 26 of the first yoke member 20, the second yoke member can be locked. it can. Therefore, the caulking work can be omitted, and the man-hours required for assembling the solenoid 10 can be reduced. Further, since the yoke 11 is made of a soft magnetic material, the upper surface portion and the bottom surface portion of the first yoke member 20 can be manually expanded, and it is necessary to make a special modification to the production equipment. Absent. Further, in the solenoid 10 according to the second embodiment of the present invention, a tapered surface 29a and a tapered surface 29b are formed on the narrow portion 22 and the narrow portion 27 of the first yoke member 20, respectively. Therefore, when the second yoke member 30 is pushed between the bottom surface plate portion 21 and the top surface plate portion 26 of the first yoke member 20, the engaging portion 32 and the engaging portion 33 of the second yoke member 30 are tapered surfaces 29a. And move toward the opening 23 and the opening 28 while sliding on the surface of the tapered surface 29b. Therefore, the second yoke member 30 can be locked by pushing the second yoke member 30 between the bottom plate portion 21 and the top plate portion 26 of the first yoke member 20. As a result, it can be assembled only by hand, and there is no need to make any special modifications to the production equipment. Furthermore, in the solenoid 10 according to the third embodiment of the present invention, tapered surfaces 37 a and 37 b are formed on the locking portion 32 and the locking portion 33 of the second yoke member 30. Therefore, when the second yoke member 30 is pushed between the bottom plate portion 21 and the top plate portion 26 of the first yoke member 20, the tip portions of the bottom plate portion 21 and the top plate portion 26 are tapered with the tapered surface 37a. It moves toward the opening 23 and the opening 28 while sliding on the surface of the surface 37b. Therefore, the second yoke member 30 can be locked by pushing the second yoke member 30 between the bottom plate portion 21 and the top plate portion 26 of the first yoke member 20. As a result, it can be assembled only by hand, and there is no need to make any special modifications to the production equipment. In addition, in the above-described three embodiments, the narrow width portion 22 and the narrow width portion 27 in which the distal end sides of the bottom surface plate portion 21 and the top surface plate portion 26 of the first yoke member 20 are also narrower toward the base end side. That is, since the width is locally narrow, coil lead wires, connectors, rectifying diodes, and the like can be arranged in a space beside the narrow portion 22 and the narrow portion 27. Therefore, it is not necessary to provide an opening for the coil lead wire in the yoke 11, and the assemblability can be improved. As a result, the cost concerning manufacture can be reduced.

  In addition, this invention is not limited to the content demonstrated above, For example, the whole plunger 15 is arrange | positioned inside a bobbin, and the structure connected to the plunger 15 protrudes the exterior of a bobbin. Or the width of the opening 23 and the opening 28 is further widened, and other objects than the second yoke member 30 such as a resin plate for fixing the terminal together with the second yoke member 30 are locked simultaneously, or the opening Various modifications can be made without departing from the scope described in each claim, such as providing an opening different from 23 and 28 and supporting another auxiliary magnetic pole.

10 solenoid 11 yoke 12 coil 13 flange 14 flange 15 plunger 16a guide 16b guide 17a guide 17b guide 18 solenoid 19 base 20 first yoke member 21 bottom plate 22 narrow portion 23 opening 24 back plate 24a Front plate portion 25 Opening portion 26 Upper surface plate portion 27 Narrow portion 28 Opening portion 29a Tapered surface 29b Tapered surface 30 Second yoke member 31 Main body portion 32 Locking portion 33 Locking portion 34 Opening portion 35 Opening portion 36 Opening portion 37a Tapered surface 37b Tapered surface 38 Opening portion 39 Opening portion 40 Yoke 41 Notch portion 42 Notch portion 43 Coil 44 Hollow portion 45 Plate member 46 Arm portion 47 Arm portion 48 Movable plunger 49 Tip portion

Claims (5)

In a solenoid having a bobbin formed in a substantially cylindrical shape, a plunger partially or entirely slidably inserted into the bobbin, and a yoke provided so as to surround the bobbin.
The yoke is provided so as to surround the upper surface side and the bottom surface side of the bobbin, and either the back surface side or the front surface side, and the front end portion of the upper surface side and the bottom surface side portion of the bobbin. A first yoke member having an opening formed in the vicinity thereof;
The bobbin is provided on the side of the bobbin not surrounding the first yoke member, and protrusions are formed on the upper end surface and the lower end surface, respectively, and these protrusions are formed on the upper surface side of the first yoke member. A second yoke member locked to each of the opening and the opening on the bottom side portion;
An opening in which the plunger is inserted in the center of one of the portion of the first yoke member that surrounds either the back side or the front side of the bobbin and the second yoke member A solenoid formed with a portion.   The first yoke member has a tapered surface that is inclined upward toward the distal end side of the portion on the upper surface side of the bobbin, and a distal end of the portion on the distal end portion of the bottom surface side of the bobbin. 2. The solenoid according to claim 1, wherein a tapered surface having a downward slope toward the side is formed.   The second yoke member has a tapered surface that is inclined downward toward a portion surrounding either the back side or the front side of the bobbin of the first yoke member at the protrusion on the upper end surface; A taper surface having an ascending slope toward a portion surrounding either the back surface side or the front surface side of the bobbin of the first yoke member is formed on the projecting portion of the lower end surface. The solenoid according to claim 1 or 2.   The first yoke member is configured such that either one or both of the upper surface side portion of the bobbin and the bottom surface side portion of the bobbin surround both sides of the back surface side and the front surface side of the bobbin. The solenoid according to any one of claims 1 to 3, wherein the solenoid is formed to be locally narrow. Furthermore, a part has a base inserted inside the bobbin,
Of the portion of the first yoke member that surrounds either the back side or the front side of the bobbin, and the second yoke member, in the center where the plunger is not inserted, The solenoid according to any one of claims 1 to 4, wherein an opening into which a part of the base is inserted is formed.

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