solenoid

Abstract

This invention provides a solenoid that can be reliably assembled without separating two independent bobbins. [Solution] In the solenoid 100, the first bobbin 112 has slits 142a and 142b located on one side of a plate 108 inserted between the first bobbin and the second bobbin 116, and engaging portions 144a and 144b located on the other side. The second bobbin, which is arranged coaxially with the first bobbin, has claws 158a and 158b that engage with the slits, and locking portions 162a and 162b that engage with the engaging portions. The engagement direction of the slits and claws and the engaging portions and locking portions is a first direction perpendicular to the axial direction. The insertion direction of the plate is a second direction perpendicular to the axial direction and the first direction. The slits and claws and the engaging portions and locking portions are engaged in the first direction, and after inserting the plate in the second direction, the sleeve is passed through in the axial direction perpendicular to the first and second directions.

Description

Technical Field

[0001] The present invention relates to a solenoid having two bobbins.

Background Art

[0002] As an example, a solenoid has two independent bobbins (coil bobbins) and has a structure in which windings (coil wires) are wound around the two bobbins (for example, Patent Documents 1 and 2). [[ID=!13]]

[0003] Patent Document 1 describes a motor. In this motor, a first coil wire wound around a first coil bobbin and a second coil wire wound around a second coil bobbin are connected to the outside through a connector portion attached to a motor case.

[0004] The connector portion of the motor has a connector terminal electrically connected to each coil wire and a connector housing that holds the connector terminal and is held by the motor case, and supplies power to each coil wire. Each coil bobbin has a terminal pin around which an end portion of the coil wire is wound and an engaging portion. The engaging portion engages with the connector housing to position the connector housing when the connector housing is attached to the motor case. Thereby, in the motor, the positional accuracy between the terminal pin of each coil bobbin and the connector terminal of the connector portion is improved.

[0005] Patent Document 2 describes a solenoid including a first coil bobbin having a first protrusion and a second coil bobbin having a second protrusion. The first protrusion has a first groove. The second protrusion is formed to fit into the first groove and has a second groove. In this solenoid, by fitting the first protrusion and the second protrusion, a coil bobbin assembly composed of the first coil bobbin and the second coil bobbin is formed.

[0006] Furthermore, the fitting portion between the first projection and the second projection has multiple through-holes separated by multiple partition walls. The ends of the coil wires wound around each coil bobbin are passed through these multiple through-holes individually. This insulates the coil wires from each other. Thus, the solenoid has an insulating structure in which the coil wires are insulated from each other by the first projection and the second projection. [Prior art documents] [Patent Documents]

[0007] [Patent Document 1] Patent No. 5636170 [Patent Document 2] Japanese Patent Publication No. 2022-127148 [Overview of the project] [Problems that the invention aims to solve]

[0008] Patent documents 1 and 2 describe a configuration with two coils, so it was sufficient to wind the wire onto two separate bobbins. However, when winding the wire continuously onto two bobbins to form a single coil, the two bobbins need to be fixed to each other to prevent them from separating during winding. However, the two bobbins are only assembled axially to each other, and there is a possibility that the two bobbins will separate during winding, making it difficult to form a coil.

[0009] In view of these problems, the present invention aims to provide a solenoid that can be reliably assembled without separating two independent bobbins. [Means for solving the problem]

[0010] To solve the above problems, a typical configuration of the solenoid according to the present invention comprises a first bobbin, a second bobbin arranged coaxially with the first bobbin, a plate inserted between the first and second bobbins, a sleeve that axially penetrates the first bobbin, the second bobbin, and the plate, and a movable core movably disposed within the sleeve. The first bobbin has a slit on one side of the plate and an engaging portion on the other side of the plate. The second bobbin has a claw that engages with the slit and a locking portion that engages with the engaging portion. The engagement direction of the slit and the claw and the engagement direction of the engaging portion and the locking portion are both in a first direction perpendicular to the axial direction. The insertion direction of the plate is a second direction perpendicular to the axial direction and the first direction. The slit and the claw and the engaging portion and the locking portion are engaged in the first direction, and the plate is inserted in the second direction. The plate is then inserted through the sleeve in an axial direction perpendicular to the first and second directions.

[0011] The engaging portion of the first bobbin described above is preferably a taper that slopes away from the axis as it approaches the second bobbin, and the locking portion of the second bobbin is preferably a taper that slopes closer to the axis as it approaches the first bobbin. [Effects of the Invention]

[0012] According to the present invention, it is possible to provide a solenoid that can be reliably assembled without separating two independent bobbins. [Brief explanation of the drawing]

[0013] [Figure 1] This is an overall diagram of the solenoid configuration in an embodiment of the present invention. [Figure 2] This figure shows the first and second bobbins of the solenoid shown in Figure 1. [Figure 3] This diagram shows the process of assembling the first bobbin and the second bobbin in Figure 2. [Figure 4] Figure 3 shows the subsequent assembly process of the solenoid. [Figure 5]Figure 4 shows the subsequent assembly process of the solenoid. [Modes for carrying out the invention]

[0014] Preferred embodiments of the present invention will be described in detail below with reference to the attached drawings. The dimensions, materials, and other specific numerical values ​​shown in these embodiments are merely examples to facilitate understanding of the invention and do not limit the present invention unless otherwise specified. In this specification and drawings, elements having substantially the same function and configuration are denoted by the same reference numerals to avoid redundant explanations, and elements not directly related to the present invention are omitted from the illustrations.

[0015] Figure 1 is an overall diagram of the solenoid 100 in an embodiment of the present invention. Figure 1(a) is a perspective view showing the external appearance of the solenoid 100. Figure 1(b) is a diagram showing the internal configuration of the solenoid 100 in Figure 1(a). The solenoid 100 is a device that includes a shaft 102 and is capable of holding the shaft 102 in two positions.

[0016] The solenoid 100 includes a shaft 102, a first coil 104, a second coil 106, and a plate 108 and sleeve 110 as shown in Figure 1(b). The first coil 104 has a first bobbin 112 made of resin and a first winding 114 wound around the first bobbin 112.

[0017] The second coil 106 has a second bobbin 116 made of resin and a second winding 118 wound around the second bobbin 116. The second bobbin 116 is a bobbin independent of the first bobbin 112 and is arranged coaxially with the first bobbin 112 as shown in the figure. The first winding 114 and the second winding 118 are wound continuously on a single winding. Therefore, the first coil 104 and the second coil 106 function as a single coil as a whole.

[0018] The plate 108 is a yoke inserted between the first bobbin 112 and the second bobbin 116 as shown in FIG. 1(b), and has a through hole 120 (see FIG. 4(a)) at its center. The sleeve 110 axially penetrates the first bobbin 112, the second bobbin 116, and the plate 108 (see FIG. 4(b)).

[0019] Also, a movable iron core 122 is disposed movably within the sleeve 110. A shaft 102 is inserted through the center of the movable iron core 122, and the shaft 102 moves as the movable iron core 122 moves.

[0020] Furthermore, the solenoid 100 includes fixed iron cores 124a, 124b, magnets 126a, 126b, a body 128, and end plates 130. The body 128 includes an integrated top plate 128a and side plates 128b, 128c. The top plate 128a has a through hole 128d. The side plates 128b, 128c are bent from the top plate 128a and face each other. Note that the top plate 128a and the side plates 128b, 128c may be configured as separate parts, and if they are separate parts, the separation may be appropriately changed.

[0021] The end plate 130 is a member fixed to the body 128, and caulks and fixes the ends 128e, 128f of the side plates 128b, 128c of the body 128 to each other. The end plate 130 also has a through hole 130a.

[0022] The fixed iron cores 124a, 124b are made of a magnetic material and form a magnetic circuit. The fixed iron core 124a is disposed inside the second coil 106 and is assembled in the through hole 128d of the top plate 128a of the body 128. Also, a shaft 102 is inserted through the center of the fixed iron core 124a. The fixed iron core 124b is disposed inside the first coil 104 and is assembled in the through hole 130a of the end plate 130. Also, the fixed iron core 124b faces the end 102a of the shaft 102.

[0023] Furthermore, the fixed cores 124a and 124b are located at both ends of the stroke (movement range La in the figure) of the movable core 122, respectively, on the protruding side (upper side in the figure) and the retracted side (lower side in the figure) of the shaft 102.

[0024] Magnets 126a and 126b are mounted on the outside of plate 108 and are positioned between the first bobbin 112 and the second bobbin 116. Magnets 126a and 126b are permanent magnets and generate magnetic flux that attracts and holds the movable core 122 to the fixed cores 124a and 124b at both ends of its stroke. Magnets 126a and 126b are magnetized in the radial direction.

[0025] The diagram illustrates the state when the shaft 102 is retracted. At this time, the magnetic flux M1 of the magnet 126a returns to the magnet 126a through the movable core 122, the fixed core 124b, the end plate 130, and the body 128. As a result, the movable core 122 is attracted to the fixed core 124b, and the retracted state of the shaft 102 is maintained.

[0026] Furthermore, when the first coil 104 and the second coil 106 of the solenoid 100 are energized, a magnetic flux M2 is generated in a direction that cancels out the magnetic flux M1 of the magnet 126a. As a result, on the fixed core 124b side, the magnetic flux M1 of the magnet 126a is weakened by the magnetic flux M2 of the first coil 104 and the second coil 106, so the attractive force between the movable core 122 and the fixed core 124b decreases.

[0027] On the other hand, on the fixed core 124a side, the magnetic flux M2 passes through the movable core 122, the fixed core 124a, and the body 128. As a result, an attractive force is generated between the movable core 122 and the fixed core 124a, allowing the movable core 122 and the shaft 102 to move to the protruding side (upper side in the figure). In this way, the solenoid 100 is able to hold the shaft 102 in two positions.

[0028] Figure 2 is a perspective view showing the first bobbin 112 and the second bobbin 116 of the solenoid 100 of Figure 1. As shown in Figure 2, the first bobbin 112 has a cylindrical portion 132 and a flange portion 134 and a flat portion 136 formed at the ends of the cylindrical portion 132, respectively.

[0029] A first winding 114 (see Figure 1) is wound around the cylindrical portion 132. The axial position of the first winding 114 is defined by the flange portion 134 and the flat portion 136. A sleeve 110 is inserted axially through the through hole 138 of the first bobbin 112.

[0030] The flat section 136 has vertical walls 140 and 141. The vertical wall 140 is formed on one side of the flat section 136 (the left side in Figure 2) and stands axially toward the second bobbin 116. Slits 142a and 142b are formed in the vertical wall 140. Engaging portions 144a and 144b are formed at the base of the vertical wall 141 on the other side of the flat section 136 (the right side in Figure 2).

[0031] As shown in Figure 2, the second bobbin 116 has a cylindrical portion 146 and a flange portion 148 and a flat portion 150 formed at the ends of the cylindrical portion 146, respectively. A second winding 118 (see Figure 1), which is continuous with the first winding 114, is wound around the cylindrical portion 146. The axial position of the second winding 118 is defined by the flange portion 148 and the flat portion 150. A sleeve 110 is inserted axially through the through hole 152 of the second bobbin 116.

[0032] Vertical walls 154 and 156 are formed on one and the other sides of the flat section 150, respectively, and are erected axially toward the first bobbin 112. Claws 158a and 158b extend from the vertical wall 154. The claws 158a and 158b engage with the slits 142a and 142b of the first bobbin 112.

[0033] Legs 160a and 160b are formed on the vertical wall 156. The legs 160a and 160b extend toward the first bobbin 112, and locking portions 162a and 162b extend from their ends. The locking portions 162a and 162b engage with the engaging portions 144a and 144b of the first bobbin 112. Grooves 164 are also formed on the vertical walls 141 and 156. Windings spanning the first bobbin 112 and the second bobbin 116 are held in the grooves 164.

[0034] The engaging portions 144a and 144b of the first bobbin 112 are tapered, inclined so that they move away from the axis of the first bobbin 112 as they approach the second bobbin 116, as shown in Figure 2. Similarly, the locking portions 162a and 162b of the second bobbin 116 are tapered, inclined so that they move closer to the axis of the second bobbin 116 as they approach the first bobbin 112. The axes of the first bobbin 112 and the second bobbin 116 are, for example, the axes passing through the centers of the through holes 138 and 152 of the first bobbin 112 and the second bobbin 116, respectively.

[0035] The assembly process for the solenoid 100 is described below. Figure 3 shows the assembly process of the first bobbin 112 and the second bobbin 116 shown in Figure 2. Figure 4 shows the assembly process of the solenoid 100 following Figure 3.

[0036] When assembling the solenoid 100, first, as shown in Figure 3(a), the claws 158a and 158b of the second bobbin 116 are brought close to the slits 142a and 142b of the first bobbin 112 (see Figure 2) (see arrow A), and the two are engaged in a first direction perpendicular to the axial direction (in the figure, the radial direction of the second bobbin 116, which is the X direction). Figure 3(b) shows the state in which the claws 158a and 158b are engaged with the slits 142a and 142b.

[0037] At the same time, as shown in Figure 3, the locking portions 162a and 162b of the second bobbin 116 are brought close to the engaging portions 144a and 144b of the first bobbin 112 (see Figure 2) (see arrow B), and the two are engaged in the first direction (X direction). Figure 3(c) shows the locking portions 162a and 162b engaged with the engaging portions 144a and 144b. This allows for the assembly of the bobbin assembly 166 in which the first bobbin 112 and the second bobbin 116 are engaged, as shown in Figure 4(a). Note that in Figure 4, the top and bottom of the first bobbin 112 and the second bobbin 116 are shown inverted compared to Figure 3.

[0038] Here, the claws 158a, 158b and locking portions 162a, 162b extending from the second bobbin 116 engage with the slits 142a, 142b and engaging portions 144a, 144b of the first bobbin 112, respectively, as described above. As a result, in the bobbin assembly 166, a space slightly smaller than the thickness dimension Lb of the plate 108 (see Figure 4(a)) is secured between the flat portion 136 of the first bobbin 112 and the flat portion 150 of the second bobbin 116.

[0039] As a result, after assembling the bobbin assembly 166, the plate 108 can be inserted between the first bobbin 112 and the second bobbin 116 in a second direction (Y direction in the figure) perpendicular to the axial direction and the first direction (X direction), as shown in Figure 4(a). When the plate 108 is sandwiched between the vertical walls 140, 141 and vertical walls 154, 156, the claws 158a and 158b cannot be removed from the slits 142a and 142b. This prevents the first bobbin 112 and the second bobbin 116 from separating.

[0040] Furthermore, by inserting the plate 108 between the first bobbin 112 and the second bobbin 116, the thickness of the plate 108 causes the taper of the engaging portion 144a, 144b of the first bobbin 112 and the taper of the locking portion 162a, 162b of the second bobbin 116 to come into contact with each other in the bobbin assembly 166. This applies a clamping tension to the bobbin assembly 166 in the thickness direction (axial direction) of the plate 108, which reliably absorbs axial play.

[0041] Next, as shown in Figure 4(b), the sleeve 110 is passed through the first bobbin 112, the second bobbin 116, and the plate 108 of the bobbin assembly 166 in the axial direction (Z direction in the figure) perpendicular to the first direction (X direction) and the second direction (Y direction). In other words, the sleeve 110 is assembled to the bobbin assembly 166 from the axial direction. The sleeve 110 is inserted through the through hole 138 of the first bobbin 112, the through hole 152 of the second bobbin 116, and the through hole 120 of the plate 108. This prevents the plate 108 from falling out between the first bobbin 112 and the second bobbin 116.

[0042] In this way, the solenoid 100 has different engagement directions (first direction) for the first bobbin 112 and the second bobbin 116, different insertion directions (second direction) for the plate 108, and different penetration directions (axial direction) for the sleeve 110. Therefore, with the solenoid 100, the two independent first bobbins 112 and second bobbins 116 can be reliably assembled without using adhesives or welding.

[0043] As a result, when winding the first winding 114 and the second winding 118 around the first bobbin 112 and the second bobbin 116 of the assembled bobbin assembly 166, the first bobbin 112 and the second bobbin 116 do not separate. Therefore, the solenoid 100 can reliably configure the first coil 104 and the second coil 106, in which the windings are connected in series to the first bobbin 112 and the second bobbin 116.

[0044] Figure 5 shows the assembly process of the solenoid 100, following Figure 4. When the first winding 114 and the second winding 118 are wound around the first bobbin 112 and the second bobbin 116 of the bobbin assembly 166, the first coil 104 and the second coil 106 shown in Figure 5(a) are formed. The first winding 114 and the second winding 118 are wound continuously through the groove 164.

[0045] Next, the retaining magnets 126a and 126b are attached to the bobbin assembly 166 from the radial direction, as shown by arrows C and D. Then, the body 128 is positioned relative to the bobbin assembly 166 so that the shaft 102 is inserted through the fixed iron core 124a, and the body 128 is brought closer to the bobbin assembly 166, as shown by arrow E.

[0046] Next, the end plate 130 is aligned with the bobbin assembly 166, and the end plate 130 is brought close to the bobbin assembly 166 as shown by arrow F. Furthermore, as shown in Figure 5(b), the end plates 128e and 128f of the side plates 128b and 128c of the body 128 are crimped together to the end plate 130, thereby fixing the end plate 130 to the body 128. This prevents the sleeve 110 from falling out of the bobbin assembly 166. In this way, the solenoid 100 can be assembled.

[0047] In the solenoid 100, the magnets 126a and 126b are mounted radially to the bobbin assembly 166, and when the body 128 is attached, radial movement is restricted. Therefore, with the solenoid 100, simply fixing the body 128 to the end plate 130 prevents the other components, the magnets 126a and 126b, from falling off.

[0048] Preferred embodiments of the present invention have been described above with reference to the attached drawings, but it goes without saying that the present invention is not limited to these examples. It will be obvious to those skilled in the art that various modifications or alterations can be conceived within the scope of the claims, and these will naturally also fall within the technical scope of the present invention. [Industrial applicability]

[0049] The present invention can be used as a solenoid having two bobbins. [Explanation of symbols]

[0050] 100…Solenoid, 102…Shaft, 104…First coil, 106…Second coil, 108…Plate, 110…Sleeve, 112…First bobbin, 114…First winding, 116…Second bobbin, 118…Second winding, 120…Through hole in plate, 122…Movable core, 124a, 124b…Fixed core, 126a, 126b…Magnet, 128…Body, 128a…Top plate, 128b, 128c…Side plate, 128d…Through hole in top plate, 128e, 128f…Side plate End portion, 130...end plate, 130a...through hole of end plate, 132, 146...tubular portion, 134, 148...flange portion, 136, 150...flat portion, 138...through hole of first bobbin, 140, 141, 154, 156...vertical wall, 142a, 142b...slit, 144a, 144b...engaging portion, 152...through hole of second bobbin, 158a, 158b...claw, 160a, 160b...leg portion, 162a, 162b...locking portion, 164...groove portion, 166...bobbin assembly

Claims

1. The first bobbin and A second bobbin is arranged coaxially with the first bobbin, A plate inserted between the first bobbin and the second bobbin, A sleeve that penetrates the first bobbin, the second bobbin, and the plate in the axial direction, The sleeve comprises a movable iron core that is movably disposed within the sleeve, The first bobbin has a slit located on one side of the plate and an engaging portion located on the other side of the plate. The second bobbin is provided with a claw that engages with the slit and a locking portion that engages with the engaging portion. The engagement direction in which the slit and the claw interlock, and the engagement direction between the engagement portion and the locking portion, are both first directions perpendicular to the axial direction. The insertion direction of the plate is a second direction perpendicular to the axial direction and the first direction, A solenoid characterized in that the slit and the claw, and the engaging portion and the locking portion are engaged in the first direction, the plate is inserted in the second direction, and the sleeve is penetrated in the axial direction perpendicular to the first and second directions.

2. The engagement portion of the first bobbin is tapered so that it moves away from the axis as it approaches the second bobbin. The solenoid according to claim 1, characterized in that the locking portion of the second bobbin is tapered so as it approaches the first bobbin, it approaches the shaft.

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