CN202332660U

CN202332660U - Speed regulating switch

Info

Publication number: CN202332660U
Application number: CN 201120498483
Authority: CN
Inventors: 陆亚洲; 贺培
Original assignee: Zhangjiagang Huajie Electronics Co Ltd
Current assignee: Zhangjiagang Huajie Electronics Co Ltd
Priority date: 2011-12-05
Filing date: 2011-12-05
Publication date: 2012-07-11
Anticipated expiration: 2021-12-05

Abstract

The utility model discloses a speed regulating switch, which cannot affect speed regulating accuracy and comprises a casing, a push rod and at least a pair of terminals. The pair of terminals are connected through a movable contact sheet, the push rod is arranged at the end portion in the casing, a spring is connected between the push rod and the inner wall of the casing, a fixed contact is arranged on one terminal, a movable contact is arranged at one end of the movable contact sheet, two stand columns are arranged on the other terminal, hollow grooves are arranged on two lateral edges of the other end of the movable contact sheet, the two stand columns are clamped into the hollow grooves, one end of the movable contact sheet is bent upwards to form a blocking sheet, a tension spring is arranged under the movable contact sheet, one end of the tension spring is connected with the inner wall of the casing, the other end of the tension spring is connected with the middle portion of the movable contact sheet, a pressing block is arranged on the push rod, and the pressing block abuts against the blocking sheet. The speed regulating switch has the advantages that the movable contact and the fixed contact can move oppositely, so that dust is not apt to accumulate between the movable contact on the movable contact sheet and the fixed contact, and the influence caused by the dust can be avoided.

Description

Speed-regulating switch

Technical field

The utility model relates to a kind of speed-regulating switch.

Background technology

The general structure of existing speed-regulating switch is to comprise that shell, an end stretch into the push rod that is used for speed governing and at least one pair of terminal in the shell, and this links to each other through movable contact spring to terminal, is connected with spring between end and the outer casing inner wall of push rod in shell.The speed-regulating switch of said structure after the conducting, promotes push rod again between movable contact spring is with corresponding terminal, change the resistance value in the loop through push rod, thereby realizes outside speed governing.Because contacting between movable contact spring and the terminal is rigid contact; After movable contact spring and terminal are on and off; In a single day leave dust between the contact-making surface of movable contact spring and terminal, will influence the current lead-through property between movable contact spring and the terminal, thereby make speed-regulating switch can't accurately realize speed governing.

The utility model content

The utility model technical problem to be solved is: provide a kind of dust can not influence the speed-regulating switch of adjusting speed accuracy.

For solving the problems of the technologies described above, the technical scheme that the utility model adopts is: a kind of speed-regulating switch comprises that shell, an end stretch into the push rod that is used for speed governing and at least one pair of terminal in the shell; This links to each other through movable contact spring to terminal, is connected with spring between end and the outer casing inner wall of push rod in shell, and said one of them terminal is provided with fixed contact; One end of movable contact spring is provided with the moving contact that matches with fixed contact, and another terminal is provided with two columns, offers the diastema groove on the dual-side of the movable contact spring other end; Two columns snap in the above-mentioned diastema groove and with movable contact spring and contact; And but movable contact spring moves with respect to the column horizontal direction, and the bending that makes progress forms catch to movable contact spring near that end of column, and catch is positioned at movable contact spring and meets the end to push rod; The below of movable contact spring is provided with extension spring; One end of extension spring links to each other with outer casing inner wall, and the other end links to each other with the middle part of movable contact spring, the tie point of extension spring and movable contact spring in the horizontal direction than the tie point of extension spring and shell more near column; The downside of push rod is provided with briquetting; The downside of briquetting and the upper end of catch offset, and when briquetting is whole when moving to catch one side and catch breaks away from, the vertical range between catch upper end and the movable contact spring greater than the lower surface of briquetting with and the top of the terminal that links to each other of column between distance.

Contact for the face face between said fixed contact and the moving contact.

The beneficial effect of the utility model is: on movable contact spring, offer the diastema groove; Make movable contact spring the time with the pair of terminal conducting; Can and one of them terminal on fixed contact between produce and relatively move; Thereby be not easy to accumulate dust between moving contact on the movable contact spring and the fixed contact, the influence of having avoided dust to bring.

Description of drawings

Fig. 1 is the not structural representation during conducting of the utility model speed-regulating switch;

Fig. 2 is not another state diagram during conducting of the utility model speed-regulating switch;

Structure chart when Fig. 3 is the conducting of the utility model speed-regulating switch;

Fig. 4 is the stereogram of movable contact spring in the utility model speed-regulating switch;

Fig. 5 is the stereogram of second terminal in the utility model speed-regulating switch.

Among the figure: 1, shell, 2, push rod, 3, the first terminal, 4, second terminal, 5, movable contact spring, 6, spring, 7, fixed contact, 8, moving contact, 9, column, 10, the diastema groove, 11, catch, 12, extension spring, 13, bearing pin, 14, briquetting.

Embodiment

Below in conjunction with accompanying drawing, describe the specific embodiments of the utility model in detail.

Like Fig. 1, Fig. 2, shown in Figure 3, the described speed-regulating switch of the utility model, comprise shell 1, an end stretch in the shell 1 the push rod that is used for speed governing 2 and at least one pair of terminal---the first terminal 3 and second terminal 4, the quantity of terminal can be decided according to actual conditions.Link to each other through movable contact spring 5 between the first terminal 3 and second terminal 4; Be connected with spring 6 between end and shell 1 inwall of push rod 2 in shell 1; Wherein the first terminal 3 is provided with fixed contact 7; One end of movable contact spring 5 is provided with moving contact 8, the second terminals 4 that match with fixed contact 7 and is provided with two columns 9---and shown in Figure 4.Offer diastema groove 10 on the dual-side of movable contact spring 5 other ends---shown in Figure 3.Two columns 9 snap in the above-mentioned diastema groove 10 and with movable contact spring 5 and contact, but and movable contact spring 5 move with respect to column 9 horizontal directions, promptly the groove width of diastema groove 10 is greater than the width that snaps in the column 9 in the diastema groove 10.The bending that makes progress forms catch 11 to movable contact spring 5 near that end of column 9; And catch 11 is positioned at movable contact spring 5 and meets the end to push rod 2, and the below of movable contact spring 5 is provided with extension spring 12, and an end of extension spring 12 links to each other with shell 1 inwall through the bearing pin 13 that is arranged on shell 1 inwall; The other end links to each other with the middle part of movable contact spring 5; The tie point of extension spring 12 and movable contact spring 5 in the horizontal direction than the tie point of extension spring 12 and shell 1 more near column 9, promptly shown in Fig. 1, Fig. 2, Fig. 3, extension spring 12 is skewed.The downside of push rod 2 is provided with briquetting 14; The upper end of the downside of briquetting 14 and catch 11 offsets; And when briquetting 14 is whole when moving to catch 11 left sides and catch 11 breaks away from, the vertical range between catch 11 upper ends and the movable contact spring 5 is greater than the distance between the top of the lower surface of briquetting 14 and second terminal 4, when promptly briquetting 14 and catch 11 offset; The left end perk of movable contact spring 5, speed-regulating switch is in not conducting state.In order to improve the conductivity between movable contact spring 5 and the first terminal 3, contact for the face face between fixed contact 7 and the moving contact 8.

The course of work of the utility model is: like Fig. 1, shown in Figure 2, push rod 2 is promoted left, when briquetting 14 moved to catch 11 left sides fully, catch 11 broke away from the compacting of briquetting 14.Catch 11 left end under the effect of extension spring 12 contacts with fixed contact 7 on the first terminal 3 until the moving contact 8 of catch 11 to sinking---and shown in Figure 3, at this moment, speed-regulating switch is in conducting, as wants speed governing, can continue to promote push rod 2.Because the tie point of extension spring 12 and movable contact spring 5 is positioned at the right side of the tie point of extension spring 12 and shell 1; Be that extension spring 12 also has level pulling force left to movable contact spring 5; Movable contact spring 5 also will be moved to the left under this active force, and a process that relatively moves is promptly arranged between moving contact 8 on the movable contact spring 5 and the fixed contact 7, can the dust between the contact-making surface of moving contact 8 and fixed contact 7 be disposed; Thereby prevent the dust stratification between moving contact 8 and the fixed contact 7, guarantee the speed adjusting performance of speed-regulating switch.

Claims

1. speed-regulating switch comprises that shell, an end stretch into the push rod that is used for speed governing and at least one pair of terminal in the shell, and this links to each other through movable contact spring to terminal; Be connected with spring between end and the outer casing inner wall of push rod in shell, it is characterized in that: said one of them terminal is provided with fixed contact, and an end of movable contact spring is provided with the moving contact that matches with fixed contact; Another terminal is provided with two columns; Offer the diastema groove on the dual-side of the movable contact spring other end, two columns snap in the above-mentioned diastema groove and with movable contact spring and contact, but and movable contact spring move with respect to the column horizontal direction; The bending that makes progress forms catch to movable contact spring near that end of column; And catch is positioned at movable contact spring and meets the end to push rod, and the below of movable contact spring is provided with extension spring, and an end of extension spring links to each other with outer casing inner wall; The other end links to each other with the middle part of movable contact spring; The tie point of extension spring and movable contact spring in the horizontal direction than the tie point of extension spring and shell more near column, the downside of push rod is provided with briquetting, the downside of briquetting and the upper end of catch offset; And when briquetting is whole when moving to catch one side and catch breaks away from, the vertical range between catch upper end and the movable contact spring greater than the lower surface of briquetting with and the top of the terminal that links to each other of column between distance.

2. speed-regulating switch according to claim 1 is characterized in that: contact for the face face between said fixed contact and the moving contact.