JP2004303633A - Contact arrangement - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a contact arrangement wherein operating sound is further reduced by relieving impact when making and breaking the contact arrangement. <P>SOLUTION: A collar part 100a expanding outward is formed at the tip of a spindle part 100 by extending the spindle part 100 upward from the top face of a holder part 51 to hold a movable contact 41, a through groove 101 for the spindle body 100b of the spindle part 100 to pass through is provided on one surface of the protruding base part 24 facing the top face of the holder part 51, the collar part 100a is positioned on the lower side of a space part 24a surrounded by the protruding base part 24, a coil spring 102 is disposed between the top face of the collar part 100a and the top face of the space part 24a, and thereby a buffer part to energize the spindle part 100 in the direction opposite to its movement is structured. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a contact device used for opening and closing an electric circuit in a moving body that travels mainly by electric power.
[0002]
[Prior art]
This type of contact device is used for the purpose of opening and closing a power supply of an automobile, and employs a configuration in which an electromagnet device drives an opening and closing of a contact mechanism. Conventionally, as an example of this type of contact device, there is one disclosed in Patent Document 1, for example.
[0003]
As shown in FIG. 35, this contact device has a configuration in which a contact body 2 for opening and closing an electric path and an electromagnet device 3 for driving the opening and closing of the contact mechanism 2 are housed in a body 1 of a synthetic resin molded product.
[0004]
The housing 1 is formed in a box shape having an open front side (a front side surface in FIG. 35; the same applies hereinafter) and houses the contact mechanism 2 and the electromagnet device 3, and is mounted on the front side of the body 1a. Cover 1b. The cover 1b is assembled by inserting four insertion projections 37 protruding from the rear surface into the insertion grooves 26 on both sides of the holding rib 25 protruding from the left and right two places on the inner surface of the upper wall of the body 1a. And sealed using a sealing material. On the outer side surfaces of the left and right side walls of the body 1a, one mounting base 11 for fixing the body 1 to another member is provided one by one.
[0005]
In addition, on the upper side of the body 1, insertion holes 23 a penetrating the body 1 back and forth are provided at two places on the left and right, and a yoke 48 formed in each of the insertion holes 23 a in an L shape is provided on the body 1. It is inserted in a form that one piece is overlapped from the front and back. A permanent magnet 49 is fixed to the other piece of the yoke 48. When the piece of the yoke 48 is inserted into the insertion hole 23a, the permanent magnet 49 is formed on the magnet mounting recesses 27 formed on both front and rear outer surfaces of the body 1. 38.
[0006]
The contact mechanism 2 includes two fixed terminal plates 40 each holding a fixed contact 2a, and a movable contact 41 holding two movable contacts 2b separated from and connected to each fixed contact 2a.
[0007]
The fixed terminal plate 40 is provided on the inner surface of the body 1a in a pair on the left and right sides so as to surround the terminal block 23 serving as the boss portion of the insertion hole 23a, and is extended along the upper surface of the terminal block 23. 40a, a contact holding piece 40b extending along the lower surface of the terminal block 23, and a connecting piece 40c connecting one end of the terminal piece 40a and one end of the contact holding piece 40b are formed in a U-shape provided continuously and integrally. ing. One end of the terminal strip 40a projects outside the body 1a through a cut groove 22 formed in the body 1a above the terminal block 23, and is located inside the body 1a above the terminal block 23 and the terminal block 23. A terminal piece 40a is sandwiched between the pressing rib 25 and a connecting piece between the terminal block 23 and a protruding section 24 protruding from the inner surface of the body 1a between the terminal blocks 23,23. 40c. The abutment portion 24 is protruded in a substantially U-shape at the center of the inner surface of the upper wall of the body 1a. A quadrangular space portion 24a is formed in a portion surrounded by the abutment portion 24. I have. The fixed contact 2a is fixed to the lower surface of the contact holding piece 40b.
[0008]
A terminal screw 43 is attached to a portion of the terminal piece 40a protruding outside the body 1a, and a nut 45 is screwed through a washer 44.
[0009]
Two movable contacts 2 b which are separated from and contacted with the two fixed contacts 2 a are fixed to both ends of the movable contact 41. That is, when the movable contact 41 moves up and down, the state in which the two fixed terminal plates 40 are electrically connected through the movable contact 41 is electrically separated from the state in which the fixed terminal plates 40 are electrically connected. The state is selected, and the contact mechanism 2 is opened and closed.
[0010]
The movable contact 41 includes a pair of contact holding pieces 41a to which the respective movable contacts 2b are fixed and is arranged to face the contact holding pieces 40b, and an open upper part connecting between the two contact holding pieces 41a. And a bridging piece 41b in the shape of a letter. A spring receiving recess 41c is formed on the lower surface of the bridging piece 41b. A bridging piece 41b, which is an intermediate portion in the longitudinal direction of the movable contact 41, is inserted into a contact holder 50 which is a synthetic resin molded product.
[0011]
The contact holder 50 has a circular cross section provided at the lower end of the upper shaft 52, the upper shaft 52 protruding from the outer surface of the lower wall 51 e of the holder 51 for holding the movable contact 41. A lower shaft portion 54 having a cross-shaped cross section protrudes from a lower surface of the lower shaft portion 53, and a connecting shaft portion 56 is formed to protrude from a lower surface of a circular locking portion 55 provided at a lower end of the lower shaft portion 54. I have. A guide 52a having a circular outer shape is formed at a vertically intermediate portion of the upper shaft portion 52, and a screw portion 56a is formed at a lower outer peripheral surface of the connecting shaft portion 56.
[0012]
The holder portion 51 is formed to have a dimension from the upper wall 51d to the lower wall 51e larger than the thickness dimension of the movable contact 41, and has a through hole 51a penetrating left and right. An assembly window 51b communicating with the through hole 51a is formed at the center. A spring receiving projection 51c protrudes from the center of the inner surface of the lower wall 51e. A contact pressure spring 47 formed of a coil spring is mounted in the through hole 51 a of the holder 51 together with the bridging piece 41 b of the movable contact 41. The upper end of the contact pressure spring 47 is inserted into a spring receiving recess 41c formed on the lower surface of the bridging piece 41b, and the spring receiving projection 51c is inserted into the lower end of the contact pressure spring 47.
[0013]
The lower part of the contact holder 50 is connected to a movable core 61 provided in the electromagnet device 3. The electromagnet device 3 includes a coil 60 and a movable iron core 61 that moves up and down in the coil 60. The coil 60 is wound around a cylindrical coil bobbin 62 which is a synthetic resin molded product. The coil bobbin 60 has a U-shaped lower yoke 63 opened upward and an upper portion extending between upper ends of both leg pieces of the lower yoke 63. It is surrounded by a yoke 64. That is, the yoke of the electromagnet device 3 includes the lower yoke 63 and the upper yoke 64. The lower yoke 63 and the upper yoke 64 are connected to a pair of connecting grooves (not shown) formed at the upper ends of both leg pieces of the lower yoke 63, respectively. Assembling is performed by fitting projections (not shown). At the center of the lower piece of the lower yoke 63, a cylindrical slide tube 63b rising upward is formed as a counter sink, and the slide tube 63b is inserted into the lower part of the coil bobbin 62. On the other hand, a cylindrical guide tube 64b projecting downward is formed continuously and integrally at the center of the upper yoke 64, and is inserted into the upper portion of the coil hobbin 62. An insertion hole 64c is formed at the center of the lower wall of the guide cylinder 64b, and a spring receiving groove 64d is formed at the center of the lower surface of the lower wall of the guide cylinder 64b.
[0014]
The movable iron core 61 is formed in a cylindrical shape to be inserted into the slide cylinder 63b. The outer peripheral surface of the movable iron core 61 reduces the friction between the movable iron core 61 and the slide cylinder 63b. Resin is coated to facilitate separation from the surface. A mounting recess 61 a is formed on the lower surface of the movable core 61, and a spring holding recess 61 b is opened on the upper surface of the movable core 61. A through hole 61c penetrates between the mounting recess 61a and the spring holding recess 61b. A spacer 69 is provided on the bottom surface of the spring holding recess 61b, and when the connecting shaft portion 56, which is the lower end portion of the contact holder 50, is inserted into the through hole 61c, the lower surface of the locking portion 55 and the spring The lower end of the screw portion 56a is exposed in the mounting recess 61a with the spacer 69 held between the holding recess 61b and the bottom surface. When the nut 65 is screwed into the screw portion 56a in this state, the movable iron core 61 can be held between the locking portion 55 and the nut 65. The lower end of the screw portion 56a is thermally fused to the nut 65, and the contact holder 50 and the nut 65 are inseparably coupled. If the thickness of the spacer 69 is adjusted here, the distance between the magnetic pole surface, which is the lower surface of the guide cylinder 64b, and the movable iron core 61 can be adjusted.
[0015]
A return spring 66 composed of a coil spring is mounted between the spring holding recess 61b of the movable core 61 and the spring receiving groove 64d of the upper yoke 64. The return spring 66 urges the movable core 61 downward. The upper shaft portion 52 provided on the contact holder 50 is inserted into a guide tube 64b provided on the upper yoke 64. The size of the guide 52a provided on the upper shaft portion 52 is set so as to be in contact with the inner peripheral surface of the guide cylinder 64b, and the movement of the contact holder 50 is regulated in the vertical direction by the guide cylinder 64b.
[0016]
A damper 67 made of an elastic material is mounted on the upper surface of the lower wall of the guide cylinder 64b, and an engaging portion 53 provided at a lower end of the upper shaft portion 52 can contact the damper 67. That is, the impact sound is reduced by abutting on the damper 67 when the locking portion 53 moves downward. Here, since the damper 67 is disposed on the inner bottom surface of the guide cylinder 64b, the damper 67 is surrounded by the coil 60. Sound transmission will be reduced.
[0017]
In the electromagnet device 3 having the above-described configuration, the lower surface of the lower yoke 63 is brought into contact with a pair of support ribs 12 protruding from the inner peripheral surface of the lower wall of the body 1a so as to be separated from each other. Are brought into contact with positioning ribs 13a, 13b protruding below the inner peripheral surfaces of the left and right side walls of the body 1a, and are housed in the body 1a. Further, in this state, the upper yoke 64 also has a pair of L-shaped portions formed by connecting a portion along the left and right side walls of the body 1a and a portion along the lower wall of the body 1a above the positioning ribs 13a and 13b. It is sandwiched between the partition 14 and the lower yoke 63. The two lead wires 68a, 68b connected to the ends of the coil 60 are drawn out of the body 1 through lead-out grooves 17a, 17b formed on the right side surface of the body 1a in FIG.
[0018]
By the way, the positioning ribs 13a, 13b and the lower end of the partition wall 14 are vertically separated from each other, and relief notches 63c are formed at both front and rear side edges of both leg pieces of the lower yoke 63 corresponding to this portion. That is, by providing the relief notch 63c, the ventilation path 15 formed between the side walls of the body 1a and the partition wall 14 communicates with the space in which the coil 60 is disposed.
[0019]
In the contact device configured as described above, when the coil 60 is not energized, the movable iron core 61 is separated from the upper yoke 64 by the spring force of the return spring 66, and is located at the position shown in FIG. At this time, the movable contact 41 is urged downward by the contact holder 50 connected to the movable iron core 61, and the movable contact 2b is separated from the fixed contact 2a.
[0020]
On the other hand, when a predetermined current is applied to the coil 60, the movable core 61 is attracted to the upper yoke 64 so as to reduce the magnetic resistance of the path through which the magnetic flux formed around the coil 60 passes. That is, the movable iron core 61 moves upward, and accordingly, the contactor holder 50 moves upward, and as a result, the movable contact 2b comes into contact with the fixed contact 2a. At this time, the spring force of the contact pressure spring 47 corresponding to the overtravel amount acts as a contact pressure between the fixed contact 2a and the movable contact 2b. That is, since the contact pressure depends on the overtravel amount, the overtravel amount, that is, the contact pressure can be adjusted by adjusting the thickness of the damper 67 or the spacer 69 described above.
[0021]
When the energization is stopped from the state where the coil 60 is energized, the movable iron core 61 tends to move downward by the spring force of the contact pressure spring 47 and the spring force of the return spring 66, and the movable contact 2b is separated from the fixed contact 2a. At this time, an arc is generated between the fixed contact 2a and the movable contact 2b, but the arc is sufficiently extended by the magnetic field of the permanent magnet 49 and extinguished.
[0022]
[Patent Document 1]
JP 2002-42628 A
[0023]
[Problems to be solved by the invention]
However, since the contact mechanism 2 is opened and closed by the electromagnet device 3 as described above, there is a problem that an impact is generated when the contact mechanism 2 is opened and closed, and an operation sound is generated. In the invention of Patent Document 1, the shock is reduced by providing the damper 67, but only the shock when the contact device is returned can be reduced, and the degree of the reduction is limited.
[0024]
The present invention has been made in view of the above problems, and an object of the present invention is to provide a contact device in which an impact at the time of opening and closing a contact mechanism is reduced, and an operation sound is further reduced.
[0025]
[Means for Solving the Problems]
In order to achieve the above object, the contact device according to claim 1, wherein a body, a coil disposed in the body, and a coil inserted into the coil and switched between excitation and non-excitation of the coil, the interior of the coil. A movable core that moves in the axial direction, a fixed contact fixed in the body, a movable contact provided with a movable contact that moves toward and away from the fixed contact in conjunction with the movement of the movable core, and the movable contact A contact device comprising: a contact pressure spring that urges the movable contact in a direction in which the fixed contact is brought into contact; and a return spring that urges the movable iron core in a direction in which the movable contact is separated from the fixed contact. In addition, a buffer is provided for urging a movable portion which is movable by switching between excitation and non-excitation of the coil in a reverse movement direction.
[0026]
According to a second aspect of the present invention, in the first aspect of the present invention, the buffer portion is disposed so as to repel each other on a portion on the moving direction side of the movable portion and on a body facing the portion. It consisted of a set of permanent magnets.
[0027]
According to a third aspect of the present invention, in the invention of the second aspect, one of the pair of permanent magnets has the same magnetic flux as the magnetic flux generated by exciting the coil. It was arranged to be in the direction.
[0028]
According to a fourth aspect of the present invention, in the contact device according to the first aspect, the buffer unit is configured such that an elastic body is fixed to at least one of the movable part and a body that collides with the movable part. .
[0029]
According to a fifth aspect of the present invention, in the contact device according to the fourth aspect, a projection is provided at the other portion where the elastic body collides.
[0030]
According to a sixth aspect of the present invention, in the contact device according to the first aspect, the buffer portion includes the movable portion and a contact portion that contacts the movable portion when the movable portion moves. And at least one of them is made of an elastic material.
[0031]
According to a seventh aspect of the present invention, in the contact device according to the first aspect of the present invention, a center portion of the movable contact and a holder portion accommodating the contact pressure spring are provided at one end and a connecting shaft portion extended from the holder portion. A contactor holder connected to the movable core, a tip end of a shaft portion extending from an outer surface of the holder portion opposite to a side on which the connection shaft portion extends, and the tip end; The buffer section is provided between the section and the vessel at a position facing the section.
[0032]
In a contact device according to an eighth aspect, in the invention according to the seventh aspect, the shaft portion is configured by connecting two shafts, and a play is provided at a connection portion.
[0033]
According to a ninth aspect of the present invention, in the contact device according to the first aspect of the present invention, a center portion of the movable contact and a holder portion accommodating the contact pressure spring are provided at one end and a connecting shaft portion extended from the holder portion. Has a contact holder connected to the movable iron core, and the cushioning portion is provided between a central portion of the movable contact and the holder portion in contact with the central portion of the movable contact.
[0034]
According to a tenth aspect of the present invention, there is provided the contact device according to the first aspect, wherein a center portion of the movable contact and a holder portion accommodating the contact pressure spring are provided at one end and a connecting shaft portion extended from the holder portion. Has a contact holder connected to the movable iron core, the connecting shaft has at least two protrusions on the shaft, and between the two protrusions, the excitation / de-excitation of the coil is performed. The reversing spring, which is pressed by one of the two protruding portions and reversed when the connecting shaft portion is moved by switching, constitutes the buffer portion.
[0035]
According to an eleventh aspect of the present invention, in the contact device according to the first aspect, a center portion of the movable contact and a holder portion accommodating the contact pressure spring are provided at one end and a connecting shaft portion extended from the holder portion. Has a contact holder connected to the movable core, and a part of the contact holder has a damper structure in which gas or liquid is sealed.
[0036]
According to a twelfth aspect of the present invention, in the first aspect of the invention, the buffer portion is formed of a spring whose spring constant increases nonlinearly as the moving amount of the movable core increases.
[0037]
According to a thirteenth aspect, in the contact device according to the twelfth aspect, the spring is used as the contact pressure spring.
[0038]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, the present invention will be described with reference to Embodiments 1 to 23.
[0039]
(Embodiment 1)
FIG. 1 is a side sectional view of the contact device of the present embodiment, and FIG. 2 is an enlarged view of a main part of the contact device of the present embodiment. However, since the basic configuration of the present embodiment is the same as that of the conventional example, common portions are denoted by the same reference numerals and description thereof is omitted, and only the features that are characteristic of the present embodiment will be described.
[0040]
That is, the contact device of the present embodiment is different from the conventional example in that the shaft portion 100 extends upward from the upper surface of the holder portion 51 and forms a flange portion 100a that extends outward at the tip of the shaft portion 100. A passage groove 101 through which the shaft main body 100b of the shaft portion 100 passes is provided on one surface of the abutment portion 24 facing the upper surface of the 51, and the flange portion 100a is located below the space portion 24a surrounded by the abutment portion 24. And the coil spring 102 is disposed between the upper surface of the flange portion 100a and the upper surface of the space portion 24a (the inner surface of the upper wall of the container 1).
[0041]
In such a contact device, the coil spring 102 is used as a buffer that urges the flange portion 100a as a movable portion that is movable when the contact device is driven (when the coil 60 is switched from non-excitation to excitation) in the opposite movement direction. Since the contact device is arranged, the impact at the time of driving the contact device is reduced by the coil spring 102, and the operation sound at the time of driving the contact device can be reduced.
[0042]
(Embodiment 2)
FIG. 3 shows an enlarged view of a main part of the contact device of the present embodiment. However, since the basic configuration of this embodiment is the same as that of the first embodiment, the common parts are denoted by the same reference numerals, and description thereof will be omitted. Only the features that are characteristic of this embodiment will be described.
[0043]
That is, in the present embodiment, the length of the shaft portion 100 is longer than that of the first embodiment, and the flange portion 100a is located near the middle of the space portion 24a surrounded by the protruding portion 24. Then, the coil spring 110 is arranged between the upper surface of the flange 100a and the upper surface of the space 24a (the inner surface of the upper wall of the body 1a), and the lower surface of the flange 100a and the lower surface of the space 24a (of the abutment 24). It is characterized in that the coil spring 111 is disposed between the coil spring 111 and the inner wall of the lower wall.
[0044]
In such a contact device, a coil spring 110 is arranged as a buffer that urges the upper surface of a flange portion 100a as a movable portion that is movable when the contact device is driven in a counter-moving direction. The coil spring 111 is arranged as a buffer for urging the lower surface of the flange portion 100a as a movable portion that can move when the contact device is switched from the excitation to the non-excitation. Is mitigated by the coil spring 110, and the impact at the time of return of the contact device is alleviated by the coil spring 111, so that both the operation sound at the time of driving the contact device and the operation sound at the time of return of the contact device can be reduced.
[0045]
(Embodiment 3)
FIG. 4 is an enlarged view of a main part of the contact device of the present embodiment. However, since the basic configuration of the present embodiment is the same as that of the conventional example, common portions are denoted by the same reference numerals and description thereof is omitted, and only the features that are characteristic of the present embodiment will be described.
[0046]
That is, the contact device of the present embodiment is characterized in that a leaf spring 120 which is bent so as to protrude upward is disposed on the inner surface of the lower wall of the body 1 below the movable iron core 61 as compared with the conventional example. There is.
[0047]
In such a contact device, the leaf spring 120 is arranged as a buffer for urging the lower surface of the movable iron core 61 as a movable portion that is movable when the contact device returns, in the anti-moving direction. It is alleviated by the leaf spring 120, and the operation sound at the time of the return of the contact device can be reduced.
[0048]
(Embodiment 4)
FIG. 5 is an enlarged view of a main part of the contact device of the present embodiment. However, since the basic configuration of the present embodiment is the same as that of the conventional example, common portions are denoted by the same reference numerals and description thereof is omitted, and only the features that are characteristic of the present embodiment will be described.
[0049]
That is, the contact device of the present embodiment is different from the conventional example in that the lower surface of the guide 52a provided on the upper shaft portion 52 of the contact holder 50 inside the guide tube 64b of the upper yoke 64 and the inner bottom surface of the guide tube 64b. The feature is that the coil spring 130 is arranged between them.
[0050]
In such a contact device, since the coil spring 130 is arranged as a buffer for urging the contact holder 50 as a movable portion that is movable when the contact device returns, in the opposite movement direction, the impact when the contact device returns is affected by the coil. The operation noise at the time of return of the contact device can be reduced by being alleviated by the spring 130.
[0051]
(Embodiment 5)
FIG. 6 is an enlarged view of a main part of the contact device of the present embodiment. However, since the basic configuration of the present embodiment is the same as that of the conventional example, common portions are denoted by the same reference numerals and description thereof is omitted, and only the features that are characteristic of the present embodiment will be described.
[0052]
That is, the contact device of the present embodiment is different from the conventional example in that the spring receiving recess 140 is provided on the upper outer peripheral surface of the movable iron core 61 and one end of the coil spring 141 is engaged with the spring receiving recess 140, and the movable iron core 61 and the upper yoke It is characterized in that a coil spring 141 is arranged between the guide tube 64 and the outer bottom surface of the guide cylinder 64b.
[0053]
In such a contact device, since the coil spring 141 is arranged as a buffer for urging the upper part of the movable core 61 as a movable portion which is movable when the contact device is driven in the anti-moving direction, an impact when the contact device is driven is reduced. It is alleviated by the coil spring 141, and the operating noise when the contact device is driven can be reduced.
[0054]
(Embodiment 6)
FIG. 7 is an enlarged view of a main part of the contact device of the present embodiment. However, since the basic configuration of this embodiment is the same as that of the first embodiment, the common parts are denoted by the same reference numerals, and description thereof will be omitted. Only the features that are characteristic of this embodiment will be described.
[0055]
That is, in the present embodiment, in place of the coil spring 102, the permanent magnet 150 is fixed to the upper surface of the flange portion 100a and the permanent magnet 151 repels the permanent magnet 150 on the upper surface of the space 24a. The feature is that it is fixed in the direction.
[0056]
In such a contact device, one set of an upper surface of the flange portion 100a of the shaft portion 100 as a movable portion that is movable when the contact device is driven, and an upper surface of the space portion 24a at a position facing the upper surface of the flange portion 100a. The permanent magnets 150 and 151 are arranged so as to repel each other to form a buffer portion. Therefore, the shock at the time of driving the contact device is reduced by the repulsive force of the permanent magnets 150 and 151, and the operating sound at the time of driving the contact device is formed. Can be reduced.
[0057]
Further, since the buffering by the permanent magnets 150 and 151 is large in a non-contact manner and in inverse proportion to the distance, the buffering effect is large as compared with the first embodiment, and the operating noise when driving the contact device can be further reduced. .
[0058]
(Embodiment 7)
FIG. 8 shows an enlarged view of a main part of the contact device of the present embodiment. However, since the basic configuration of this embodiment is the same as that of the third embodiment, the same reference numerals are given to the common portions and the description thereof will be omitted, and only the features that are the features of the present embodiment will be described.
[0059]
That is, the contact device of the present embodiment is different from the third embodiment in that the permanent magnet 160 is disposed on the lower surface of the movable iron core 61 instead of the leaf spring 120, and the lower wall of the body 1 below the movable iron core 61. It is characterized in that the permanent magnet 161 is arranged on the inner surface so as to repel the permanent magnet 160.
[0060]
In such a contact device, a pair of permanent magnets 160 and 161 are provided on the lower surface of the movable iron core 61 as a movable part that is movable when the contact device is returned, and on the lower wall inner surface at a position facing the lower surface of the movable iron core 61. Since the buffer portions are configured to repel each other, the shock at the time of return of the contact device is mitigated by the repulsive force of the permanent magnets 160 and 161, and the operation sound at the time of return of the contact device can be reduced.
[0061]
At this time, as shown in the schematic diagram of FIG. 9, the magnetic flux generated by the excitation of the coil 60 passes through one of the permanent magnets 160 through which the magnetic flux generated by the excitation of the coil 60 passes. By arranging them in such a direction, the attraction force generated by the electromagnet device 3 can be increased by the magnetic flux generated by the permanent magnet 160.
[0062]
(Embodiment 8)
FIG. 10 shows an enlarged view of a main part of the contact device of the present embodiment. However, since the basic configuration of the present embodiment is the same as that of the second embodiment, the common components are denoted by the same reference numerals, and the description thereof will be omitted. Only the features that are characteristic of the present embodiment will be described.
[0063]
That is, in the present embodiment, a permanent magnet 170 is attached to the tip of the shaft portion 100 instead of the coil springs 110 and 111 in the second embodiment, and the upper surface of the space portion 24a is opposed to the permanent magnet 170 in a direction to repel the permanent magnet 170. It is characterized in that the permanent magnet 171 is fixed, and a permanent magnet 172 having a groove through which the shaft portion 100 passes is fixed to the lower surface of the space portion 24a in a direction to repel the permanent magnet 170.
[0064]
In such a contact device, a pair of permanent magnets is provided on the tip of the shaft portion 100 as a movable portion that is movable when the contact device is driven, and on the upper surface of the space portion 24a at a position facing the tip of the shaft portion 100. The permanent magnets 172 are disposed on the lower surface of the space 24a so as to repel each other and repel the lower surface of the permanent magnet 170 as a movable portion that is movable when the contact device is returned. Therefore, the shock at the time of driving the contact device is reduced by the repulsive force of the permanent magnets 170 and 171, and the shock at the time of return of the contact device is reduced by the repulsive force of the permanent magnets 170 and 172. Both the operation sound at the time of driving and the operation sound at the time of return of the contact device can be reduced.
[0065]
(Embodiment 9)
FIG. 11 shows an enlarged view of a main part of the contact device of the present embodiment. However, since the basic configuration of the present embodiment is the same as that of the conventional example, common portions are denoted by the same reference numerals and description thereof is omitted, and only the features that are characteristic of the present embodiment will be described.
[0066]
That is, in the contact device of the present embodiment, a permanent magnet 180 having an insertion hole through which the lower shaft portion 54 of the contact holder 50 passes is fixed to the inner bottom surface of the guide cylinder 64b of the upper yoke 64, as compared with the conventional example. It is characterized in that a permanent magnet 181 is fixed to the lower surface of the locking portion 53 of the contact holder 50 so as to repel the permanent magnet 180 from each other.
[0067]
In such a contact device, the lower surface of the locking portion 53 of the contact holder 50 as a movable portion that is movable when the contact device returns, and the guide tube 64b of the upper yoke 64 at a position facing the lower surface of the locking portion 53. Since a set of permanent magnets 180 and 181 are arranged on the inner bottom surface so as to repel each other to form a buffer portion, the shock at the time of return of the contact device is reduced by the repulsive force of the permanent magnets 180 and 181. The operation sound at the time of returning the device can be reduced.
[0068]
At this time, as shown in the schematic diagram of FIG. 12, one permanent magnet 180 through which the magnetic flux generated by the excitation of the coil 60 passes passes through the same direction as the flow of the magnetic flux generated by the excitation of the coil. With such a configuration, the magnetic flux generated by the permanent magnet 180 can increase the attraction force generated by the electromagnet device 3.
[0069]
(Embodiment 10)
FIG. 13 is an enlarged view of a main part of the contact device of the present embodiment. However, since the basic configuration of this embodiment is the same as that of the first embodiment, the common parts are denoted by the same reference numerals, and description thereof will be omitted. Only the features that are characteristic of this embodiment will be described.
[0070]
That is, in the present embodiment, a damper rubber 190 as an elastic body is fixed to the upper surface of the flange portion 100a instead of the coil spring 102 in the first embodiment, and the coil 60 is excited to move the contact holder 50 upward. It is characterized in that the length of the shaft portion 100 is set such that the damper rubber 190 sometimes collides with the upper surface of the space portion 24a.
[0071]
In such a contact device, a damper rubber 190 as an elastic body is provided on one of the flange portions 100a of the flange portion 100a as a movable portion that is movable when the contact device is driven and the upper surface of the space 24a where the flange portion 100a collides. Since the buffer portion is fixed, the shock at the time of driving the contact device is reduced by the damper rubber 190, and the operating noise at the time of driving the contact device can be reduced.
[0072]
As shown in FIG. 14, a protrusion 191 may be provided on the upper surface of the space 24a where the damper rubber 190 collides. By providing the protrusion 191, when the damper rubber 210 collides with the upper surface of the space 24 a, the contact area between the damper rubber 190 and the upper surface of the space 24 a gradually increases, and the operation noise is further reduced. can do.
[0073]
Further, instead of the damper rubber 190, an elastic body made of a gel or an elastomer may be used.
[0074]
(Embodiment 11)
FIG. 15 is an enlarged view of a main part of the contact device of the present embodiment. However, since the basic configuration of this embodiment is the same as that of the first embodiment, the common parts are denoted by the same reference numerals, and description thereof will be omitted. Only the features that are characteristic of this embodiment will be described.
[0075]
That is, this embodiment is different from the first embodiment in that a flange portion 100a ′ having a smaller outward extent than the flange portion 100a of the first embodiment is formed at the tip of the shaft portion 100, and the left and right sides in the space 24a are formed. It is characterized in that leaf springs 200 and 201 are arranged on the surface so as to face the upper surface of the flange portion 100a '. The leaf springs 200 and 201 are arranged on the same plane at intervals smaller than the width of the flange portion 100a 'and at intervals larger than the width of the shaft main body 100b.
[0076]
In the contact device configured as described above, when the coil 60 is excited, the flange portion 100a 'comes into contact with the leaf springs 200 and 201 and moves upward while bending the leaf springs 200 and 201. When the excitation of the coil 60 is stopped, the flange 100a 'comes into contact with the leaf springs 200 and 201 and moves downward while bending the leaf springs 200 and 201.
[0077]
Such a contact device has a flange portion 100a ′ as a movable portion that is movable at the time of driving and return of the contact device, and a contact portion that contacts when the flange portion 100a ′ moves. Since the buffer unit is constituted by the two leaf springs 200 and 201 as described above, the shock at the time of driving and returning the contact device is mitigated by the bending of the two leaf springs 200 and 201, and at the time of driving the contact device. And the operation sound at the time of the return of the contact device can be reduced.
[0078]
Further, since the spring load of the contact device is not changed until the flange portion 100a 'comes into contact with both leaf springs 200 and 201, the operation noise can be reduced while maintaining the performance of the contact device.
[0079]
The shape of the leaf springs 200 and 201 is not limited to a specific shape as long as it deflects by colliding with the flange 100a '. For example, the flange 100a' collides with one leaf spring. It may be one provided with a hole having a size that allows it to pass therethrough.
[0080]
(Embodiment 12)
FIG. 16 is an enlarged view of a main part of the contact device of the present embodiment. However, since the basic configuration of the present embodiment is the same as that of the second embodiment, the common components are denoted by the same reference numerals, and the description thereof will be omitted. Only the features that are characteristic of the present embodiment will be described.
[0081]
That is, in the present embodiment, the shaft 100 is formed by connecting the lower shaft 211 and the upper shaft 210 to the second embodiment, and the connecting portion between the upper shaft 210 and the lower shaft 211 is different from that of the second embodiment. It is characterized by the fact that play is provided.
[0082]
The lower shaft portion 211 extends upward from the upper surface of the holder 51, and a tip portion 211a is formed to have a substantially rectangular cross section to form a space portion 211b. Further, a groove 211c through which the shaft main body 210c of the upper shaft portion 210 passes is formed on the front end surface of the front end portion 211a.
[0083]
The upper shaft portion 210 has flanges 210a and 210b that extend outward at both ends of the shaft main body 210c, and one of the flanges 210a is surrounded by the protrusion 24 as in the case of the flange 100a of the second embodiment. And the other flange 210b is located near the upper side of the lower shaft 211 in the space 211b.
[0084]
The vertical length of the space portion 211b is formed to be longer than the thickness of the flange portion 210b, and the upper shaft portion 210 and the lower shaft portion 211 are formed such that the flange portion 210b has an upper surface and a lower surface in the space portion 211b. It is connected with play within the range of contact.
[0085]
Further, similarly to the second embodiment, the coil spring 110 is disposed between the upper surface of one flange 210a of the upper shaft 210 and the upper surface of the space 24a, and the lower surface of the flange 210a and the lower surface of the space 24a. A coil spring 111 is disposed between the coil spring 111 and the inner surface of the lower wall of the protrusion 24.
[0086]
In the contact device configured as described above, when the movable iron core 61 is attracted to the upper yoke 64 when the coil 60 is excited, and the contact holder 50 moves upward accordingly, the moving distance of the contact holder 50 is reduced to the above-described range. Within the play range, only the lower shaft portion 211 moves upward, and from the time beyond the play range, the upper shaft portion 210 is pressed by the lower shaft portion 211 and moves upward. Be relaxed. Similarly, when the excitation of the coil 60 is stopped, only the lower shaft 211 moves downward when the distance of the downward movement of the contact holder 50 is within the play range, and when the distance exceeds the play range. , The upper shaft portion 210 moves downward so as to be pulled by the lower shaft portion 211, and the impact is reduced by the coil spring 111.
[0087]
According to the configuration of the second embodiment, a load is always generated to reduce the impact, so that the spring load of the contact device changes and the operating speed of the movable part is reduced, so that the operating performance and the breaking performance of the contact device are reduced. However, in the present embodiment, the load can be generated only immediately before the occurrence of the impact, and the load can be unloaded otherwise, and the contact point can be maintained without changing the spring load of the contact point while maintaining the performance of the contact point. It is possible to reduce both the operation sound when the device is driven and the operation sound when the contact device is returned.
[0088]
As shown in FIG. 17, instead of the coil springs 110 and 111, a permanent magnet 220 is attached to the tip of the upper shaft 210, and the permanent magnet 221 is repelled from the permanent magnet 220 on the upper surface of the space 24a. Further, a permanent magnet 222 having a groove on the lower surface of the space portion 24a through which the upper shaft portion 160 passes may be fixed in a direction to repel the permanent magnet 220. In this case as well, it is possible to reduce both the operation sound when driving the contact device and the operation sound when returning the contact device, while maintaining the performance of the contact device.
[0089]
(Embodiment 13)
FIG. 18 shows an enlarged view of a main part of the contact device of the present embodiment. However, since the basic configuration of the present embodiment is the same as that of the eleventh and twelfth embodiments, common parts are denoted by the same reference numerals, and description thereof will be omitted. I do.
[0090]
That is, in the present embodiment, in contrast to the eleventh and twelfth embodiments, the upper shaft portion 230 is formed of damper rubber instead of the upper shaft portion 210, and the forked portions 230a and 230b are formed at the ends, and the upper shaft portion 230 faces the upper shaft portion 230. It is characterized in that a hole 231 is formed on one surface of the abutment portion 24.
[0091]
The bifurcated portions 230a and 230b are bulged outward near the center in the up-down direction, and the outer shape of the hole 231 is set to a size that allows the bifurcated portions 230a and 230b to pass through while flexing inward.
[0092]
In the contact device configured as described above, when the coil 60 is excited, the distance of movement of the contact holder 50 is within the range of the play of the connecting portion between the upper shaft portion 230 and the lower shaft portion 211. Only the portion 211 moves upward, and the upper shaft portion 230 is pressed by the lower shaft portion 211 and moves upward from the point of time beyond the play range, and the forked portions 230a and 230b pass through the hole 231 while bending inward. I do. Further, when the excitation of the coil 60 is stopped, only the lower shaft portion 211 moves downward when the distance of the downward movement of the contact holder 50 is within the play range, and when the distance exceeds the play range. Then, the upper shaft portion 230 moves downward so as to be pulled by the lower shaft portion 211, and the forked portions 230a and 230b pass through the hole 231 while bending inward.
[0093]
The contact device has an upper shaft portion 230 as a movable portion that is movable when the contact device is driven and returned, and a hole 231 as a contact portion that contacts when the upper shaft portion 230 moves. 230 is constituted by a damper rubber as an elastic body to constitute a buffer portion, and a play is provided at a connection portion between the upper shaft portion 230 and the lower shaft portion 211, so that the contact device can be driven and returned when it is driven. The impact is alleviated by the bending of the forked portions 230a and 230b, so that both the operation sound at the time of driving the contact device and the operation sound at the time of return of the contact device can be reduced. The performance of the contact device can be maintained without changing the load.
[0094]
(Embodiment 14)
FIG. 19 shows an enlarged view of a main part of the contact device of the present embodiment. However, since the basic configuration of the present embodiment is the same as that of the conventional example, common portions are denoted by the same reference numerals and description thereof is omitted, and only the features that are characteristic of the present embodiment will be described.
[0095]
That is, the contact device of the present embodiment is characterized in that a damper rubber 240 as a buffer portion is arranged between the bridging piece 41b of the movable contact 41 and the inner surface of the upper wall 51d of the holder portion 51 as compared with the conventional example. is there.
[0096]
In such a contact device, since the damper rubber 240 is arranged as a shock-absorbing portion that urges the holder portion 51 as a movable portion that is movable when the contact device returns, in the anti-moving direction, the shock when the contact device returns is generated by the damper rubber 240. As a result, the operation sound when the contact device is returned can be reduced.
[0097]
(Embodiment 15)
FIG. 20 is a schematic view of a main part of the contact device of the present embodiment. However, since the basic configuration of the present embodiment is the same as that of the conventional example, common portions are denoted by the same reference numerals and description thereof is omitted, and only the features that are characteristic of the present embodiment will be described.
[0098]
That is, the contact device of the present embodiment is different from the conventional example in that the reversing spring 250 is sandwiched between the circular guide 52a provided on the upper shaft portion 52 of the contact holder 50 and the circular locking portion 53. The arrangement is such that when the contactor holder 50 moves up and down inside the guide tube 64b of the upper yoke 64, the reversing spring 250 is pressed by one of the guide 52a or the locking portion 53 and is reversed. There are features.
[0099]
In such a contact device, the reversing spring 250 is provided as a buffering portion for urging the contact holder 50 as a movable portion which is movable at the time of operation and return of the contact device in the opposite movement direction. The impact at the time of return is mitigated by the bending of the reversing spring 250, and the operation sound at the time of driving and returning of the contact device can be reduced. Further, the performance of the contact device can be maintained without changing the spring load of the contact device until the reversing spring 250 contacts the guide 52a or the reversing spring 250 contacts the locking portion 53.
[0100]
(Embodiment 16)
FIG. 21 shows a side sectional view of the contact device of the present embodiment. However, since the basic configuration of the present embodiment is the same as that of the conventional example, common portions are denoted by the same reference numerals and description thereof is omitted, and only the features that are characteristic of the present embodiment will be described.
[0101]
That is, the contact device of the present embodiment is characterized in that a part of the contact holder 50 (the upper shaft portion 52) has a damper structure in which oil is sealed, as compared with the conventional example.
[0102]
As shown in FIG. 22, the damper structure includes a cylinder 260 housed in a guide cylinder 64b of an upper yoke 64, the upper shaft 52 penetrating through the cylinder 260, and a cylinder 260 fixed to the upper shaft 52. A piston 261 for dividing the inside into two and an oil 262 filled in the cylinder are provided. The piston 261 is provided with a gap 261a, and the upper surface and the lower surface of the piston communicate with each other via the gap 261a.
[0103]
In the contact device configured as described above, when the movable iron core 61 is attracted to the upper yoke 64 when the coil 60 is excited, and the contact holder 50 moves upward accordingly, oil in one chamber in the cylinder 260 is discharged. It moves to the other chamber via the gap 261a, and the contact holder 50 as a movable part is urged in the opposite movement direction by the resistance of oil at the time of this movement, so that the impact is reduced. Similarly, when the excitation of the coil 60 is stopped, the impact is reduced by the resistance of the oil.
[0104]
In such a contact device, the shock generated at the time of driving and returning the contact device is reduced by the damper structure, so that both the operation sound at the time of driving the contact device and the operation sound at the time of returning the contact device can be reduced. .
[0105]
(Embodiment 17)
FIG. 23 schematically shows an enlarged view of a main part of the contact device of the present embodiment. However, since the basic configuration of the present embodiment is the same as that of the conventional example, common portions are denoted by the same reference numerals and description thereof is omitted, and only the features that are characteristic of the present embodiment will be described.
[0106]
That is, the contact device of the present embodiment is characterized in that a conical unequal pitch spring 270 is used as the contact pressure spring 47 for pressing the movable contact 41 against the upper wall 51d of the holder portion 51, as compared with the conventional example. There is.
[0107]
FIG. 24 shows the relationship between the stroke amount x of the movable iron core 61 when the conventional contact pressure spring 47 is used, the spring load F1, and the electromagnet attractive force F2. Before the coil 60 is excited, the movable contact 2b is opposed to the fixed contact 2a with a contact gap L1. When the coil 60 is energized, the movable iron core 60 is attracted to the upper yoke 64, and the contact holder 50 moves upward accordingly, and the movable contact 2b gradually reduces the contact gap L1. The spring load changes from the point P to the point Q and comes into contact with the fixed contact 2a. Thereafter, as shown at point R, when the spring load of the contact pressure spring 47 suddenly increases and the contact holder 50 further moves upward, the movable contact 2b moves by the amount of overtravel L2, and the point from point R The spring load on S further increases.
[0108]
Here, when the electromagnet attraction force F2 exceeds the spring load F1, the contact device is driven. However, as the difference between the electromagnet attraction force F2 and the spring load F1 increases, the impact generated during driving increases. Therefore, in order to reduce the difference between the electromagnet attractive force F2 and the spring load F1, it is conceivable to increase the spring constant of the contact pressure spring 47. However, if the spring constant of the contact pressure spring 47 is increased, α shown in FIG. The difference between the electromagnet attraction force F2 and the spring load F1 at the portion indicated by becomes small, and an operation failure called hesitation occurs.
[0109]
Accordingly, by using a conical unequal-pitch spring 270 wound from one side to the other and changing the pitch from sparse to dense as the contact pressure spring, the spring load is reduced as shown in F1 ′ in FIG. As the stroke of the movable iron core 61 increases, it becomes nonlinearly large, and the difference between the electromagnet attractive force F2 and the spring load F1 ′ can be reduced without causing hesitation, and the impact during driving can be reduced.
[0110]
In such a contact device, without using any additional components, a non-uniform pitch spring 20 is used as a contact pressure spring to constitute a buffer portion for urging the contact holder 50 as a movable portion in the opposite movement direction, The shock at the time of driving can be reduced, and the operating sound at the time of driving the contact device can be reduced.
[0111]
In addition, by increasing the terminal load S ′, the contact pressure can be increased, the contact resistance can be reduced, the conduction performance can be improved, and the vibration resistance and the electromagnetic repulsion resistance can be improved.
[0112]
(Embodiment 18)
FIG. 25 schematically shows an enlarged view of a main part of the contact device of the present embodiment. However, since the basic configuration of the present embodiment is the same as that of the sixteenth embodiment, the common components are denoted by the same reference numerals and description thereof will be omitted, and only the features that are the features of the present embodiment will be described.
[0113]
That is, the contact device of this embodiment is characterized in that two coil springs 280 and 281 are used in parallel instead of the unequal pitch spring 270 as compared with the seventeenth embodiment.
[0114]
Also in this case, a non-linear spring constant can be obtained as in the case where the unequal pitch spring 270 is used, and the degree of freedom in spring design can be increased as compared with the seventeenth embodiment.
[0115]
Further, the coil spring 280 may be a right-handed spring, and the coil spring 281 may be a left-handed spring. In this case, by using the springs having different winding directions, the rotational torque generated in the movable contact 41 is offset, and the movable contact 41 does not slide on the inner surface of the body 1, preventing resin shaving, It is possible to prevent the generation of foreign substances that have a serious adverse effect on the contact performance. Further, the contact position of the contact can be stabilized by suppressing the rotation of the movable contact 41.
[0116]
(Embodiment 19)
FIG. 26 schematically shows an enlarged view of a main part of the contact device of the present embodiment. However, since the basic configuration of this embodiment is the same as that of the seventeenth embodiment, the common parts are denoted by the same reference numerals, and description thereof will be omitted.
[0117]
That is, the contact device of the present embodiment is characterized in that two coil springs 290 and 291 are used in series with the partition plate 292 interposed therebetween instead of the unequal pitch spring 270 as compared with the seventeenth embodiment. .
[0118]
Even in this case, the same effect as when the unequal pitch spring 270 is used can be obtained. Further, the degree of freedom in spring design can be increased as compared with the seventeenth embodiment.
[0119]
(Embodiment 20)
FIG. 27 schematically shows an enlarged view of a main part of the contact device of the present embodiment. However, since the basic configuration of the present embodiment is the same as that of the nineteenth embodiment, the common parts are denoted by the same reference numerals, and the description thereof will be omitted.
[0120]
That is, in the contact device of the present embodiment, as compared with the nineteenth embodiment, the two strong and weak coil springs 290 and 291 are separated by the stopper 300 having the protrusion 300a above, and the weak (small spring constant) coil spring 291 is stopped by the stopper. It is characterized in that the coil spring 290 is arranged above the 300 and the strong (large spring constant) coil spring 290 is arranged below and used in series.
[0121]
According to the above configuration, the weak coil spring 291 is compressed until the tip of the protrusion 300a of the stopper 300 contacts the lower surface of the movable contact 41, and is strong after the protrusion 300a contacts the movable contact 41. Only the coil spring 290 will be compressed.
[0122]
In this contact device, in addition to the effects of the nineteenth embodiment, the stroke to the inflection point of the contact pressure springs (coil springs 290, 291) can be determined by the stopper 250, and the variation in the spring load can be reduced. Can be.
[0123]
As shown in FIG. 28, when the upper end of the strong coil spring 290 is locked inside the protrusion 300a of the stopper 300, the total length of the serial coil springs 290, 291 can be shortened.
[0124]
(Embodiment 21)
FIG. 29 schematically shows an enlarged view of a main part of the contact device of the present embodiment. However, since the basic configuration of this embodiment is the same as that of the twentieth embodiment, the common parts are denoted by the same reference numerals, and the description thereof will be omitted.
[0125]
That is, the contact device of the present embodiment is characterized in that a spring stopper 310 having a leaf spring portion 310a is used instead of the weak coil spring 291 and the stopper 300 as compared with the twentieth embodiment.
[0126]
As shown in FIG. 30, the spring stopper 310 has a structure in which a rectangular leaf spring portion 310a is sandwiched between an upper tubular portion 310b and a lower tubular portion 310c of a rectangular tubular shape. Until the lower tubular portion 310c abuts on the lower portion 310b, the leaf spring portion 310a has a spring property due to bending.
[0127]
In such a contact device, the same effect as that of the twentieth embodiment can be obtained, and the number of components can be reduced by integrating the coil spring 291 and the stopper 300.
[0128]
(Embodiment 22)
FIG. 31 schematically shows an enlarged view of a main part of the contact device of the present embodiment. However, since the basic configuration of this embodiment is the same as that of the twentieth embodiment, the common parts are denoted by the same reference numerals, and the description thereof will be omitted.
[0129]
That is, the contact device of the present embodiment is characterized in that, compared to the twentieth embodiment, the strong coil spring 290 is also provided with a stopper.
[0130]
In the present embodiment, the strong coil spring 290 and the weak coil spring 291 are separated by a first stopper 320 having a projection 320a below, and further between the weak coil spring 291 and the movable contact 41. A second stopper 321 having a protrusion 321a below is arranged.
[0131]
According to the above configuration, the weak coil spring 291 is compressed until the protrusion 321a of the second stopper 321 contacts the flange of the first stopper 320, and the strong coil spring 290 is compressed by the protrusion 320a of the first stopper 320. It is compressed until it and the lower wall 51e of the holder part 51 contact.
[0132]
In such a contact device, in addition to the effect of the twentieth embodiment, the terminal load of the spring can be made to depend only on the component tolerance of the first and second stoppers 320 and 321, and the variation in the spring load can be further reduced. it can.
[0133]
(Embodiment 23)
FIG. 32 schematically shows an enlarged view of a main part of the contact device of the present embodiment. However, since the basic configuration of this embodiment is the same as that of the twentieth embodiment, the common parts are denoted by the same reference numerals, and the description thereof will be omitted.
[0134]
That is, the contact device of the present embodiment is different from that of the twentieth embodiment in that the upper end of the weak coil spring 291 is expanded outward, and the outside of the movable contact 41 is supported by the coil spring 291. There are features.
[0135]
In such a contact device, in addition to the effect of the nineteenth embodiment, by supporting the outside of the movable contact 41, the inclination of the movable contact 41 can be suppressed, and the contact simultaneousness at the time of driving and returning can be improved. it can.
[0136]
Further, as shown in FIG. 33, a spring stopper 330 in which the coil spring 291 and the stopper 300 are integrated may be used. The spring stopper 330 has a flange portion 330b that locks the upper end of the coil spring 290 formed at the lower end of a rectangular cylindrical portion 330a, and a plate spring portion 330c that is opened outward at the upper end of the cylindrical portion 330a. I have. The leaf spring portion 330c is disposed in a concave portion 331 formed on the lower surface of the movable contact 41, and has a spring property in a range where the left and right side walls of the concave portion 331 abut on the leaf spring portion 330c.
[0137]
In such a contact device, the stroke of the contact pressure spring (leaf spring portion 270c and coil spring 240) up to the inflection point can be determined by the shape of the concave portion 331.
[0138]
Further, as shown in FIG. 34, a spring stopper 340 in which the spring stopper 330 and the coil spring 290 are integrated may be used. The spring stopper 340 sandwiches a rectangular spring portion 340c between an upper tubular portion 340a and a lower tubular portion 340b, and is a leaf spring 340d in which the upper end of the upper tubular portion 340a is opened outward. I have. In this case, the V-shaped spring portion 341c acts as a weak spring, and the plate spring 341d acts as a strong spring.
[0139]
【The invention's effect】
The contact device according to claim 1, wherein the movable core is a body, a coil disposed in the body, and axially moved inside the coil by switching between excitation and non-excitation of the coil inserted into the coil. A fixed contact fixed in the body, a movable contact provided with a movable contact that moves in and out of the fixed contact in conjunction with the movement of the movable core, and a movable contact in a direction in which the movable contact comes into contact with the fixed contact. A contact device comprising: a contact pressure spring for urging the movable contact; and a return spring for urging the movable iron core in a direction in which the movable contact is separated from the fixed contact. Since the shock-absorbing portion that urges the movable portion that is movable by the switching in the opposite movement direction is provided, the shock at the time of opening and closing the contact mechanism is reduced by the shock-absorbing portion urging the movable portion in the opposite movement direction, Effect of reducing operating noise A.
[0140]
3. The contact device according to claim 2, wherein the buffering portion is formed of a pair of permanent magnets disposed so as to repel each other on a portion on the moving direction side of the movable portion and a body located at a position facing the portion. Therefore, there is an effect that the buffer portion that urges the movable portion in the opposite movement direction by the repulsive force of the pair of permanent magnets can be realized.
[0141]
According to a third aspect of the present invention, in the invention of the second aspect, one of the pair of permanent magnets has the same magnetic flux as the magnetic flux generated by exciting the coil. Since the magnets are arranged in the same direction, there is an effect that the attraction force of the contact device can be increased by the magnetic flux generated from the one permanent magnet.
[0142]
According to a fourth aspect of the present invention, in the contact device according to the first aspect, the buffer unit is configured such that an elastic body is fixed to at least one of the movable portion and a body against which the movable portion collides. There is an effect that it is possible to realize the buffer portion that urges the movable portion in the opposite movement direction by the elastic force of the elastic body.
[0143]
In the contact device according to a fifth aspect of the present invention, in the invention according to the fourth aspect, since a projection is provided on the other portion where the elastic body collides, a contact area between the elastic body and a portion where the elastic body collides is provided. Increases step by step, so that the effect of reducing the operation sound can be enhanced.
[0144]
According to a sixth aspect of the present invention, in the contact device according to the first aspect, the buffer portion includes the movable portion and a contact portion that contacts the movable portion when the movable portion moves. And at least one of the elastic members is constituted by an elastic body, thereby realizing the buffer portion for urging the movable portion in the opposite movement direction by the elastic force of the elastic body when the movable portion and the contact portion come into contact with each other. There is an effect that can be.
[0145]
According to a seventh aspect of the present invention, in the contact device according to the first aspect of the present invention, a center portion of the movable contact and a holder portion accommodating the contact pressure spring are provided at one end and a connecting shaft portion extended from the holder portion. A contactor holder connected to the movable core, a tip end of a shaft portion extending from an outer surface of the holder portion opposite to a side on which the connection shaft portion extends, and the tip end; Since the buffering portion is provided between the portion and the body at a position facing the portion, there is an effect that a contact device in which the buffering portion is provided at the position of the tip of the shaft portion can be realized.
[0146]
In the contact device according to an eighth aspect, in the invention according to the seventh aspect, the shaft portion is formed by connecting two shafts and a play is provided at a connection portion. Since the force does not work, the opening and closing speed of the contact device does not decrease, the speed can be reduced only immediately before the impact of the contact device, and the operation sound can be reduced while maintaining the performance of the contact device. is there.
[0147]
According to a ninth aspect of the present invention, in the contact device according to the first aspect of the present invention, a center portion of the movable contact and a holder portion accommodating the contact pressure spring are provided at one end and a connecting shaft portion extended from the holder portion. Has a contactor holder connected to the movable iron core, and the buffer portion is provided between the central portion of the movable contactor and the holder portion with which the central portion of the movable contactor comes into contact. The shock generated by the collision between the child and the holder part is reduced by the buffer part, and there is an effect that the operation sound can be reduced.
[0148]
According to a tenth aspect of the present invention, there is provided the contact device according to the first aspect, wherein a center portion of the movable contact and a holder portion accommodating the contact pressure spring are provided at one end and a connecting shaft portion extended from the holder portion. Has a contact holder connected to the movable iron core, the connecting shaft has at least two protrusions on the shaft, and between the two protrusions, the excitation / de-excitation of the coil is performed. When the connecting shaft portion is moved by switching, the buffering portion is configured by arranging the reversing spring which is pressed by one of the two protruding portions and reversing, so that the reversing spring is reversible. The bending reduces the shock when the contact mechanism is opened and closed, thereby reducing the operation noise. Further, the spring load of the contact device is not changed until the reversing spring comes into contact with the one protrusion, so that the performance of the contact device is improved. Operation noise is reduced while maintaining There is an effect that kill.
[0149]
According to an eleventh aspect of the present invention, in the contact device according to the first aspect, a center portion of the movable contact and a holder portion accommodating the contact pressure spring are provided at one end and a connecting shaft portion extended from the holder portion. Has a contactor holder connected to the movable iron core, and a part of the contactor holder has a damper structure in which gas or liquid is sealed, so that the damper structure urges the movable portion in a reverse movement direction. There is an effect that a buffer can be realized.
[0150]
According to a twelfth aspect of the present invention, in the contact device according to the first aspect, the buffer portion is formed of a spring whose spring constant increases nonlinearly as the moving amount of the movable core increases. There is an effect that it is possible to realize the cushioning portion that can greatly reduce the impact as the moving amount increases.
[0151]
In the contact device according to the thirteenth aspect, in the invention according to the twelfth aspect, since the spring is used as the contact pressure spring, there is an effect that the buffer portion can be realized without adding a new component.
[Brief description of the drawings]
FIG. 1 is a side sectional view of a contact device according to a first embodiment.
FIG. 2 is an enlarged view of a main part of the above.
FIG. 3 is an enlarged view of a main part of a contact device according to a second embodiment.
FIG. 4 is an enlarged view of a main part of a contact device according to a third embodiment.
FIG. 5 is an enlarged view of a main part of a contact device according to a fourth embodiment.
FIG. 6 is an enlarged view of a main part of a contact device according to a fifth embodiment.
FIG. 7 is an enlarged view of a main part of a contact device according to a sixth embodiment.
FIG. 8 is an enlarged view of a main part of a contact device according to a seventh embodiment.
FIG. 9 is an explanatory diagram for explaining a method of disposing permanent magnets according to the embodiment.
FIG. 10 is an enlarged view of a main part of a contact device according to an eighth embodiment.
FIG. 11 is an enlarged view of a main part of a contact device according to a ninth embodiment.
FIG. 12 is an explanatory diagram illustrating a method of arranging permanent magnets according to the embodiment.
FIG. 13 is an enlarged view of a main part of a contact device according to a tenth embodiment.
FIG. 14 is an enlarged view of a main part of the contact device having another configuration according to the embodiment.
FIG. 15 is an enlarged view of a main part of the contact device of the eleventh embodiment.
FIG. 16 is an enlarged view of a main part of the contact device having another configuration according to the embodiment.
FIG. 17 is an enlarged view of a main part of a contact device according to a twelfth embodiment.
FIG. 18 is an enlarged view of a main part of a contact device according to a thirteenth embodiment.
FIG. 19 is an enlarged view of a main part of a contact device according to a fourteenth embodiment.
FIG. 20 is an enlarged view of a main part of the contact device of the fifteenth embodiment.
FIG. 21 is a sectional side view of a contact device according to a sixteenth embodiment.
FIG. 22 is an enlarged view of a main part of the contact device of the above.
FIG. 23 is an enlarged view of a main part of the contact device of the seventeenth embodiment.
FIG. 24 is an explanatory diagram showing a relationship between a stroke and a force of the contact pressure spring according to the first embodiment.
FIG. 25 is an enlarged view of a main part of the contact device of the eighteenth embodiment.
FIG. 26 is an enlarged view of a main part of the contact device of the nineteenth embodiment.
FIG. 27 is an enlarged view of a main part of a contact device according to a twentieth embodiment.
FIG. 28 is an enlarged view of a main part of the contact device having another configuration according to the embodiment.
FIG. 29 is an enlarged view of a main part of the contact device of the twenty-first embodiment.
FIG. 30 is a perspective view of the same stopper.
FIG. 31 is an enlarged view of a main part of a contact device according to a twenty-second embodiment.
FIG. 32 is an enlarged view of a main part of a contact device according to a twenty-second embodiment.
FIG. 33 is an enlarged view of a main part of the contact device having another configuration according to the embodiment.
FIG. 34 is an enlarged view of a main part of the contact device having another configuration according to the embodiment.
FIG. 35 is a view showing a conventional contact device.
[Explanation of symbols]
1 body
1a body
1b Cover
2 Contact mechanism
2a Fixed contact
2b movable contact
3 Electromagnet device
40 fixed terminal board
41 Movable contact
47 Contact pressure spring
50 Contact Holder
51 Holder
53 Locking part
56 Connecting shaft
60 coils
61 Movable iron core
66 Return spring

Claims (13)

A body, a coil disposed in the body, a movable core inserted inside the coil and moving in the coil in the axial direction by switching between excitation and non-excitation of the coil, and a fixed body fixed in the body. A contact, a movable contact provided with a movable contact that moves toward and away from the fixed contact in conjunction with the movement of the movable core, and a contact that biases the movable contact in a direction in which the movable contact comes into contact with the fixed contact. In a contact device comprising a pressure spring and a return spring for urging the movable iron core in a direction in which the movable contact is separated from a fixed contact, a movable portion movable by switching between excitation and non-excitation of the coil is deflected. A contact device provided with a buffer for urging in a moving direction. The said buffer part consists of a pair of permanent magnets arrange | positioned so that it may repel mutually with the part of the moving direction side of the said movable part, and the container body in the position facing the said part. The contact device as described. 3. The method according to claim 2, wherein one of the pair of permanent magnets is arranged such that the flow of the magnetic flux is in the same direction as the flow of the magnetic flux generated by exciting the coil. Contact device. 2. The contact device according to claim 1, wherein the shock-absorbing section is configured by fixing an elastic body to at least one of the movable part and a body that collides with the movable part. 3. The contact device according to claim 4, wherein a projection is provided at the other portion where the elastic body collides. The buffer portion includes the movable portion and a contact portion that contacts the movable portion when the movable portion moves, and at least one of the movable portion and the contact portion is formed of an elastic body. The contact device according to claim 1. A contact part holder having a central part of the movable contact and a holder part accommodating the contact pressure spring at one end, and a connecting shaft part extending from the holder part being connected to the movable core; The cushioning portion is provided between a distal end of a shaft portion extending from an outer surface of the outer surface of the shaft portion opposite to a side on which the connecting shaft portion extends, and the body at a position facing the distal end portion. The contact device according to claim 1, further comprising: The contact device according to claim 7, wherein the shaft portion is formed by connecting two shafts, and a play is provided at a connection portion. A contact holder having a central portion of the movable contact and a holder accommodating the contact pressure spring at one end and a connecting shaft extending from the holder connected to the movable core; The contact device according to claim 1, wherein the buffer portion is provided between a central portion of the child and the holder portion with which the central portion of the movable contact comes into contact. A contact holder having a central portion of the movable contact and a holder accommodating the contact pressure spring at one end and a connection shaft extending from the holder being connected to the movable core; The portion has at least two protrusions on the shaft, and when the connection shaft moves between the two protrusions by switching the excitation / non-excitation of the coil, the two protrusions 2. The contact device according to claim 1, wherein the buffer unit is configured by disposing a reversing spring that is pressed and reversed by one of the protrusions. A contact holder having a central portion of the movable contact and a holder accommodating the contact pressure spring at one end, and a connecting shaft extending from the holder being connected to the movable core; 2. The contact device according to claim 1, wherein a part of the holder has a damper structure in which gas or liquid is sealed. 2. The contact device according to claim 1, wherein the shock-absorbing portion is formed of a spring whose spring constant increases nonlinearly as the amount of movement of the movable core increases. 3. The contact device according to claim 12, wherein the spring is used as the contact pressure spring.

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