CN2262745Y

CN2262745Y - Overtravel-limit switch

Info

Publication number: CN2262745Y
Application number: CN 96229711
Authority: CN
Inventors: 虞伟辉
Original assignee: Individual
Current assignee: Individual
Priority date: 1996-04-18
Filing date: 1996-04-18
Publication date: 1997-09-17
Anticipated expiration: 2006-04-18

Abstract

The utility model relates to a traveling switch which comprises a casing body (13), a switch cover (5) connected with the casing body, a contact point arranged in the casing body and a contact point trigger control mechanism which controls the opening and the closing of the contact point; the utility model is characterized in that a fastening groove (20) is arranged on the casing body (13), a fastening board which bulges towards the direction of the fastening groove is arranged on the switch cover (5), and the fastening board (21) is fastened on the fastening groove; a screw between the switch cover and the casing body is omitted by the utility model, the switch cover and the casing body can be kept in a no loosened state under the environment of vibration, and the operating troubles of products are reduced.

Description

Travel switch

The utility model relates to a kind of switch.

In the prior art, be provided with in the housing of travel switch or limit switch contact, control contact trigger mechanism, cover the switch cover on housing, described switch cover is connected to a fixed by screw and housing.Because the trigger mechanism of travel switch constantly is subjected to the shake-up of Be Controlled object, so the vibrations of travel switch are very big, the holding screw between housing and the switch cover is easy to owing to vibrations get loose.

The purpose of this utility model is to provide a kind of housing that can make travel switch firmly to be connected and to tolerate the travel switch of vibrations with switch cover.

The technical solution of the utility model is: it comprises housing, the switch cover that is connected with housing, is located at the contact in the housing, the contact triggering controlling organization that the control contact is switched on or switched off; Described housing is provided with draw-in groove, and switch cover is provided with the clamp that protrudes to the draw-in groove direction, and described clamp is stuck in the described draw-in groove.

The utility model compared with prior art has following advantage:

(1). because the clamp on the switch cover relies on the elasticity of clamp to be stuck in the draw-in groove on the housing, so switch cover is tight with being connected of housing, can be owing to the phenomenon that gets loose appears in vibrations.

(2). no screw is connected between switch cover and the housing, so do not need special-purpose screwdriver when dismounting or assembling, emergency treatment when being convenient to the utility model and breaking down.

The utility model will be further described below in conjunction with drawings and Examples:

Accompanying drawing 1 is a structural front view of the present utility model;

Accompanying drawing 2 is the A-A direction cutaway view of accompanying drawing 1; Wherein:

[1]. nut insert; [2]. fixed contact; [3]. spring; [4]. sealing ring; [5]. switch cover; [6]. sealing ring; [7]. roller; [8]. rivet; [9]. turning rolls; [10]. positioning seat; [11]. push rod; [12]. movable contact spring; [13]. housing; [14]. the activity slide core; [15]. spring; [16]. sliding heart cover plate; [17]. fixed contact; [18]. terminal screw; [19]. the switch cover rotating shaft; [20]. draw-in groove; [21]. clamp; [22]. the inclined-plane; [23]. the hole.

Embodiment: referring to accompanying drawing 1 and accompanying drawing 2, the switch cover [5] that comprise housing [13], is connected with housing, be located at the contact in the housing, the contact that the control contact is switched on or switched off triggers controlling organization; Described housing [13] is provided with draw-in groove [20], and switch cover [5] is provided with the clamp [21] that protrudes to draw-in groove [20] direction, and described clamp [21] is stuck in the described draw-in groove [20].The housing [13] in described draw-in groove [20] outside is provided with and can makes clamp [21] to the inclined-plane [22] that moves away from draw-in groove [20] direction.Described switch cover [5] below is provided with switch cover rotating shaft [19], and described switch cover rotating shaft [19] is stuck in the groove of housing [13].The groove below of described housing [13] has the breach that is slightly larger than rotating shaft [19] diameter.Switch cover rotating shaft [19] on the switch cover [5] enters groove from described indentation, there, makes switch cover rotating shaft [19] to rotate in described groove.Described clamp [21] is connected as a single entity with switch cover [5], owing to adopt plastics to make, so clamp [21] high resilience, clamp [21] is [22] upwards slip along the inclined-plane, final clamp [21] enters in the draw-in groove [20], finishes the cooperation that is connected between switch cover [5] and the housing [13].Be provided with hole [23] between described clamp [21] and the housing [13], when object inserts in this hole, can upwards lever up clamp [21], make it break away from draw-in groove [20], switch cover [5] just can break away from housing [13].The contact that alleged contact, control contact are switched on or switched off in the utility model triggers controlling organization and is prior art, and described contact triggers controlling organization can be roller type or lever, and present embodiment is a roller type.

Claims

1. travel switch, the switch cover [5] that comprise housing [13], is connected with housing, be located at the contact in the housing, the contact that the control contact is switched on or switched off triggers controlling organization; It is characterized in that: described housing [13] is provided with draw-in groove [20], and switch cover [5] is provided with the clamp [21] that protrudes to draw-in groove [20] direction, and described clamp [21] is stuck in the described draw-in groove [20].

2. travel switch according to claim 1 is characterized in that: the housing [13] in described draw-in groove [20] outside is provided with and can makes clamp [21] to the inclined-plane [22] that moves away from draw-in groove [20] direction.

3. travel switch according to claim 1 is characterized in that: described switch cover [5] below is provided with switch cover rotating shaft [19], and described switch cover rotating shaft [19] is stuck in the groove of housing [13].

4. travel switch according to claim 3 is characterized in that: the groove below of described housing [13] has the breach that is slightly larger than rotating shaft [19] diameter.

5. travel switch according to claim 1 is characterized in that: be provided with hole [23] between described clamp [21] and the housing [13].