JP2669427B2 - Timer switch - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a timer switch for controlling the operation of a load such as a fan later than the operation of an operating body. A conventional timer switch of this type is disclosed in, for example, Japanese Utility Model Publication No. 47-39590 (Prior Art 1), in which a timer is mounted on and fixed to a substrate. A mechanism is attached, and this substrate is housed in a case and fixed. It should be noted that this prior art 1 does not disclose anything about a terminal connected to an external electric wire and a specific structure for housing this terminal. Also, as another timer switch,
Japanese Patent Laid-Open No. 51-36223 (Prior Art 2) discloses an opening / closing contact mechanism that is opened and closed by operating an operating body, a cam lever that is driven by operating the operating body, and a micro switch that is opened and closed by the cam lever. And an electric motor for rotating a cam plate for operating the cam lever.
However, the related art 2 does not disclose anything about a structure for mounting and holding an electric motor, a terminal connected to an external electric wire, and a specific structure for housing this terminal. Furthermore, Japanese Utility Model Publication No. 57-14337 (Prior Art 3) discloses a case in which a current transformer transformer recess having a relatively deep depth is formed in the center of the case, and terminals having a relatively shallow depth are stored on both ends. A three-way switch in which recesses are provided and a current transformer and terminals are housed in each storage recess is shown. In the prior art 1, since the substrate is fixed in the switch case, a work space for the same is required, and the switch case, that is, the entire device becomes large in size. There is. Further, there is a problem that the fixing work is troublesome and it is difficult to improve the assembly accuracy. Furthermore, the prior art 1 does not show the terminal connected to the external electric wire and the housing structure thereof. However, depending on the housing structure of the terminals, the entire delay switch becomes large or the assembly becomes extremely troublesome. That is, in a structure in which the terminals are implanted in a switch case, for example, the operation is troublesome, and the entire switch becomes large in terms of the operation space. It is easy to understand that the prior art 2 also does not show the storage structure of the electric motor, the terminal, etc., and therefore has the same problem as the prior art 1 unless the structure is specially devised. . Further, since the prior art 3 is a three-way switch and is completely different from the timer switch, it would be a person skilled in the art to apply the technique of the prior art 3 to the timer switch. But it is not easy to imagine. Moreover, in the prior art 3, since the height of the current transformer is substantially the same as the difference in depth between the central storage portion and the storage recesses at both ends, and is smaller than the depth of the storage recesses at both ends, the current transformer is changed. The transformer does not contribute to holding the position of the terminal. For this reason, some means is required to hold the terminal in position, which complicates the structure and increases the size, and also causes a cost increase. Further, since the current transformer is small in height as described above, when the current transformer is dropped and stored, it is difficult to store it in the bottom of the central storage recess. That is, in the case of dropping and storing, it is necessary to work in a narrow case in order to dispose at the bottom beyond the stepped portion of the central storage recess and the storage recesses at both ends, which is troublesome. In particular, when the terminals are stored first in the terminal storage recesses, it becomes more difficult to store the current transformer. According to the present invention, the timer unit and the terminal can be easily assembled, and the timer unit and the terminal can be securely housed and held without rattling to the regular position of the housing recess, thereby improving the assemblability and downsizing. It ’s easy,
It is an object of the present invention to provide a timer switch that can be assembled in advance to increase the assembly accuracy of the timer unit itself. According to the present invention, an opening portion is formed in one case member, and a box-shaped switch which is divided into two parts is provided with storage recesses formed in a central portion and at both end portions of the opening portion so as to communicate with the opening portion. A case; a timer unit that is stored by being dropped into a storage recess in the central portion; and a terminal that is stored by being dropped into the storage recesses at both ends, wherein the storage recess at the center is the storage recesses at both ends It is formed deeper, and a step is formed at the boundary between the central storage recess and both end storage recesses; the timer unit has a timer unit and a timer case housing the timer unit. The terminal and the timer unit are formed in a box shape having a height larger than the difference between the depths of the storage recesses at the center and the storage recesses at both ends and greater than the depths of the storage recesses at both ends. In a state of being housed in each housing recess, the terminal-side side wall portion and the terminal of the timer case are arranged close to each other and face each other. In the timer switch of the present invention, the timer unit and the terminal are respectively accommodated by being dropped into the accommodation recess. Also, the timer unit is unitized by storing it in a box-shaped timer case that is larger than the difference between the depths of the storage recesses at the center and the storage recesses at both ends and greater than the depths of the storage recesses at both ends. ing. When the terminal and the timer unit are housed, the side surfaces of the timer case on the housing recess side of both ends and the terminal are arranged close to each other and face each other. For this reason, the terminal is prevented from falling toward the storage recess side in the central portion or the terminal is shaken by the side surface of the timer case, and the terminal is held in position. Also,
When the timer unit is stored, the height of the timer case is large. Therefore, if the upper end portion of the timer case is held, the storage work can be performed in a wide space outside the switch case. After the timer unit is stored, it is positioned and held by using the side wall of the storage recess in the center and the side wall of the step. Next, an embodiment of the present invention will be described with reference to the drawings. FIG. 1 is a vertical sectional front view of one embodiment, FIG. 2 is a partially cutaway front view showing a shaft supporting portion of an operating body, FIG. 3 is a perspective view of an opening / closing contact mechanism, and FIG. 4 is a timer. It is a vertical side view of a unit. In FIGS. 1 and 2, A is a box-shaped switch case that is divided into two parts, and is composed of one case member 1 and the other case member 43. One case member 1 is formed in a box shape having an open upper surface, and has a storage recess 3 at the center and storage recesses 2 and 2 at both ends that communicate with the opening. One storage recess 2 has one terminal plate 4
However, in the other accommodation recess 2, a pair of left and right terminal plates 5,
6 are respectively stored and arranged by being dropped from the openings. Locking pieces 7 are fitted to the terminal plates 4, 5, and 6, respectively. Terminal plates 4, 5, 6 and lock pieces 7
The terminal is formed by. Each of the storage recesses 2, 2, 3
The storage recess 3 at the center is relatively deep, and the storage recesses 2, 2 at both ends are formed shallower than the storage recess 3 at the center. Steps 50, 50 are formed at the boundary between the storage recess 3 at the center and the storage recesses 2, 2 at both ends. Reference numeral 20 denotes a timer unit, which is housed in the housing recess 3 at the center of the case member 1 by dropping from the upper opening. This timer unit 20 has a box-shaped timer case 21 as shown in FIG.
A timer unit (speed control unit) is incorporated in the space 21. In addition, as shown in FIGS. 1 and 2, this timer case is larger than the difference in depth between the storage recess 3 at the center and the storage recesses 2 and 2 at both ends, and the storage recesses 2 and 2 at both ends. Formed at a height greater than the depth of In the present embodiment, a recessed step portion 22 is provided at the lower part of one side of the timer case 21 for arranging a timer opening / closing contact mechanism 17, which will be described later. The timer opening / closing contact mechanism 17 includes, for example, an elastic movable contact piece plate 18 connected to the one terminal plate 4 by welding or the like, and a fixed contact piece 19 connected to the other one side terminal plate 5. It consists of. The fixed contact piece 19 is provided at a lower portion of the case member 1 at a lower portion of the concave step portion 22,
The movable contact piece plate 18 is disposed above the fixed contact piece 19. The timer case 21 of the timer unit 20 is provided with a main shaft 25 to which a ratchet ratchet wheel 24 rotatably mounted on the first case 23 of the timer portion is fixed.
A set and reset mechanism, for example, a cam 26 is attached to the main shaft 25 so as to face one outer surface of the case 21. One end of a coil spring 27 is locked to the protrusion 26a of the cam 26, and the other end of the spring 27 is locked to a lower part of the case 21 on one side. The cam 26 has a cam edge 28 for pressing the movable contact plate 18 against the fixed contact 19. The timer case 21 is formed such that the dimension between the end of the main shaft 25 of the ratchet ratchet wheel 24 protruding from one side and the other side is substantially the same as the width of the central storage recess 3 of the case member 1. The cam 26 and the spring 27 are provided in a space formed between one side surface of the timer case 21 housed in the central housing recess 3 and the inner side surface of the central housing recess 3.
Is arranged. Further, in the timer case 21 of the timer unit 20, a ratchet pawl 24
No. 1 gear 29 which is rotated by coupling only one-way rotation to
The first gear 29 is urged by a spring 30 in a direction to engage with the ratchet ratchet 24. Also,
In the timer case 21, a No. 1 eye 23 and a second pinion 31 meshing with the No. 1 eye 23 are arranged in parallel, and a No. 2 gear 32 integrated with the second pinion 31 is the No. 1 gear. 23 meshes with a third pinion 33 coaxial with 23, a third gear 34, a fourth pinion 3
Ankle shaft 39, in which slow-moving gear groups including fifth and fourth gears 36 and a fifth pinion 37 are arranged in parallel with each other and sequentially meshes with each other, and the fifth pinion 37 engages with an escape wheel 38.
Is attached to the ceiling 40. As described above, the timer unit 20 is provided with the timer portion (speed adjusting portion), the cam 26 of the set / reset mechanism for bringing the fixed contact piece 19 and the movable contact piece portion 18 into and out of contact with each other. Reference numeral 41 denotes an operating body. As shown in FIGS. 1 and 2, the support shafts 16 are fitted to the lower portions on both sides of the operating body 41. Further, the operating body 41 is disposed above the support shaft 16, and shaft portions 42 protruding on both sides are rotatably engaged with shaft stopper recesses 44 formed on both sides of the other case member 43. The lower part of one side of the operating body 41 is disposed on one side of the central storage recess 3 of the case member 1,
An operating portion 46 that engages with the operated portion 45 formed in 6 is projected. The operating surface of the operating portion 46 of the operating body 41 is located between the inner side surface of the central storage recess 3 of the case member 1 and the side surface portion of the timer case 21 of the timer mechanism 20 with respect to the cam 26 of the set / reset mechanism. Are arranged in a substantially orthogonal direction. Further, the operating body 41 is formed in a box shape having an open lower surface, and the upper part of the mover 10 is arranged inside thereof. Further, the other case member 43 is attached to the upper surface of the one case member 1 by a mounting member 47, and the terminal plates 4, 5, 6 are held by the other case member 43. The upper surface operation portion 48 of the operation body 41 is disposed in the upper surface opening of the case member 43. Next, 8 is a quick-moving on / off contact mechanism provided in this embodiment, which is a mover 10 having a movable contact piece 9.
And a fixed contact piece 11 with which the movable contact piece 9 contacts and separates. The mover 10 is supported by a support portion 12 that extends horizontally from the upper edge of the one terminal plate 4 above the storage recess 3, that is, toward the opening side of the case member 1. A concave pivot support portion 13 bent in a substantially V shape is formed on each of both side portions of the support portion 12, and a support piece provided on both sides of the mover 10 fitted to the support portion 12 is formed on the pivot support portion 13. Part 1
4 is swingably supported. And this mover 1
At the lower end of 0, there is formed a movable contact piece portion 9 which comes in contact with and separates from a fixed contact piece 11 which extends from the upper edge of the other terminal plate 6 on the other side above the storage recess 3 and below the support portion 12. ing. Further, the support shaft 16 is locked below the support portion 12 at the lower end of the coil spring 15 whose one end is locked at the upper end of the mover 10. Next, the operation of this embodiment will be described. At the time of assembly, the timer unit 20 is dropped and stored in the storage recess 3 at the center of the case member 1. At this time, hold the upper end of the timer case 21 from the opening to the timer case 2
When 1 is inserted into the accommodating recess 3 with its side wall guided, the height of the timer case 21 is larger than the depth of the accommodating recesses 2 and 2 at both ends, so that the timer case 21 reaches the bottom of the case member 1. All or most of the case member 1
Can be inserted in a large space outside the building. Therefore, the dropping operation is easy. In the present embodiment, when the timer case 21 is housed, the cam 26 of the set / reset mechanism is arranged between one side surface of the timer case 21 and the inner side surface of the side wall of the housing recess 3 at the center of the case member 1. Is established. The terminals 4, 5, and 6 are dropped and stored in storage recesses 2 and 2 at both ends of the case member 1. The terminals 4, 5 and 6 are arranged in close proximity to the side wall of the timer case 21 so as to face each other when the timer unit 20 is housed. Therefore, in the present embodiment, the position is held by contacting the side wall of the timer case 21. Also, terminal 4,
A timer opening / closing contact mechanism 17 and a fast-moving opening / closing contact mechanism 8 respectively connected to 5 are arranged near the timer unit 20 on the bottom side and the opening side of the central storage recess 3 respectively. Since the timer opening / closing contact mechanism 17 is disposed in the relatively deep storage recess 3 in the center and the terminals 4, 5, 6 are disposed in the relatively shallow storage recesses 2, 2, they are vertically separated. , The insulation distance is increasing. And the operating tool 4
1 is attached to the case member 1, the operating portion 4 of the operating body 41
The operation surface of No. 6 corresponds to the cam 26 of the set and reset mechanism
The timer unit 20 is disposed in a substantially orthogonal direction between the inner surface of the storage recess 3 of the main body 1 and the side surface of the timer case 21 of the timer unit 20. Next, when the operating body 41 is swung clockwise from the state shown by the solid line in FIG. 1 as shown by the chain line, the operating body 41 is rotated by the engagement of the shaft portion 42 and the shaft support recess 44. Then, the support shaft 16 is moved to the left side in FIG. The spring 15 moves beyond the dead center position, and the mover 10 rotates in the clockwise direction in FIG. 1 with the support piece 14 pivotally supported by the support piece 13, and the movable contact piece 9 contacts the fixed contact piece 11. The quick-moving on / off contact mechanism 8 is closed in response to the operating body 41. Further, when the operating body 41 is rotated, its operating portion 46 is moved.
Pushes the actuated portion 45 of the cam 26 of the set / reset mechanism to rotate the cam 26 in the counterclockwise direction in FIG. 1, and the cam edge 28 of the cam 26 causes the movable contact plate of the timer opening / closing contact mechanism 17 to move. When the movable contact piece plate 18 is pushed, the movable contact piece plate 18 is brought into contact with the fixed contact piece 19 to be closed. The rotation of the cam 26 causes the spring 2 to move.
7 is extended and stored. At this time, since the operating surface of the operating portion 46 of the operating body 41 is substantially orthogonal to the operated portion 45 of the cam 26 of the set / reset mechanism, the operating portion 4
The motion transmission from the cam 6 to the cam 26 is performed well. When the cam 26 rotates, the ratchet ratchet wheel 24 is rotated counterclockwise in FIG. 1, but the first gear 29 is not rotated. When the operating body 41 is pushed, the operating body 41 changes from the chain line state in FIG. 1 to the solid line state, the support shaft 16 moves to the right side in FIG.
Causes the movable element 10 to be reversed, and the movable contact piece portion 9 of the quick-action opening / closing contact mechanism 8 separates from the fixed contact piece 11 and is opened. The movable element 10 is inverted by the spring 15 in FIG.
The state shown in FIG. In addition, the rotating operation of the operating body 41 causes the operating portion 46 thereof to release the pressure holding of the operated portion 45 of the cam 26, and the cam 26 is stored in the spring 27 in FIG. It is rotated clockwise. The ratchet wheel 24 is rotated by the rotation of the cam 26, and the first gear 29 is rotated by the clockwise rotation of the ratchet wheel 24 in FIG. Kana 3
1st, 2nd gear 32, 3rd pinion 33, 3rd gear 34, 4th
It meshes with the pinion 35, the fourth gear 36, and the fifth pinion 37 in order,
The movable contact plate 18, which was engaged with the cam edge 28 immediately before the rotation of the cam 26 was stopped by the release of the stored force of the spring 27, was engaged by the escape gear 38 and the tenfu 40 in order to rotate the cam 26 in a loose engagement. When the contact is released, the movable contact piece plate 18 is given an opening force to separate from the fixed contact piece 19 by its elasticity, and the timer opening / closing contact mechanism 17 is opened. Therefore, the fast opening / closing contact mechanism 8 can be opened and closed by operating the operating body 41, the timer mechanism can be operated by operating the operating body, and the timer opening / closing contact mechanism 17 can be operated by being delayed by operating the operating body. . Although the movement mechanism has been described for the timer section in the above embodiment, the invention is not limited to this structure, and a timer section such as an electric motor may be used. As described above in detail, according to the present invention, the timer unit and the terminal can be dropped into the opening and stored, and the depth of the central storage recess is formed deeper than the storage recesses at both ends. With each boundary as a step, and
The height of the timer case is set to be larger than the difference between the depth of the storage recess at the center and the depth of the storage recess at both ends, and greater than the depth of the storage recess at both ends. Since the terminal side surface of the case and the terminal are disposed close to each other and opposed to each other, the terminal can be prevented from falling down or rattling into the central storage recess side, and the position of the terminal can be held. Therefore, each of the timer unit and the terminal can be arranged at the proper position. Further, when the timer unit is stored, the insertion work can be performed in a wide space outside the case member. Therefore, it is easy to assemble, the structure is simple, and the size can be reduced. Further, the timer unit can be independently assembled, and the assembling accuracy of the timer unit can be improved. Further, since only the central storage recess is formed deep in one case member, the lower surfaces of the storage recesses at both ends can be thinned to save material.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a vertical sectional front view showing an embodiment of the present invention. FIG. 2 is a partially cutaway front view showing a shaft supporting portion of an operating body. FIG. 4 is a vertical side view of the timer mechanism. A ... Case, 1 ... One case member, 2, 3 ... Storage recess, 4, 5, 6 ... Terminal plate, 20 ... Timer unit, 21
... Timer case, 43 ... The other case member, 50 ... Stepped part.

Claims (1)

(57) [Claims] An opening part in one case member, a box-shaped switch case which is in communication with the opening part and has a storage recess formed in the central part and both ends thereof; and a timer housed by being dropped into the storage recess in the central part. A unit; and a terminal that is received by being dropped into the storage recesses at both ends. The storage recess at the center is formed deeper than the storage recesses at both ends, and the storage recess at the center and the storage recesses at both ends are provided. A step is formed at the boundary of the storage recess; the timer unit has a timer part and a timer case that stores the timer part. The timer case has a depth of the storage recess at the center and a depth of the storage recess at both ends. Is formed into a box shape having a height larger than the difference in height and larger than the depth of the storage recesses at both ends; the terminal and the timer unit have terminals of the timer case when stored in the storage recesses. A timer switch, wherein a side wall portion and a terminal are arranged close to each other and opposed to each other.