DE8523851U1 - Button arrangement for tip switches - Google Patents

Description

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I I O

BLAUPUNKT-WEKOrGM * BH

PLI-Hi Pieper / TEX2-Kh - 1 - 8/15/1985

R ₄ No. 1883

Key arrangement for tip-boards

The invention relates to a key arrangement for tip switches according to the Oberbeeriff of claim 1.

With electronic devices it is often necessary to have several in the front wall to provide key buttons arranged next to and / or one above the other for tip switches arranged behind them.

In such key arrangements it is known to use the key buttons in To store guides perpendicular to the plane of the front wall, as well as to mount additional springs, which the key buttons in their Bring rest position. Such key arrangements also require tight manufacturing tolerances and complex assembly, especially then » when the key arrangement comprises a plurality of keys.

The invention is based on the object of a key arrangement for tip switches to create, which consists of a few easy-to-manufacture parts and which allows a large number of keys in a small space.

BLAUPUNKT-WEK1TE "GMBH

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PLI-Hi Piiiper7TEX2-Kh - 2 - 8/15/1985

R ^ no * 1883

This task is achieved with a generic key arrangement by the characterizing features of claim 1 solved.

The measures listed in the subclaims are advantageous Refinements of the key arrangement specified in claim 1 are possible.

The advantages achieved by the invention are in particular that all keys of a row of the key arrangement are part of a one-piece molded part made of elastic plastic, no guides in the Require front wall, easy to assemble and easy to use. Because it is fixed to the front wall, there is one for all keys in a row common centering in the openings in the front panel. Furthermore, as a result of the torsional and bending moments of the rail and the webs caused restoring forces no additional restoring springs are required. In addition, there is no rattling of loose keys.

An embodiment of the invention is shown in the drawing and is described in more detail below.

BLAUPUNKT-WERKITGMBH

PLI-Hi Pieper / TEX2-Kh - 3 - 8/15/1985

R.No. 1883

Show it

Figure 1 is a sectional side view of a key arrangement,

Figure 2 the front view,

Figure 3 is a plan view and

FIG. 4 shows a side view of a key buttons and operating elements Part of the key layout

In a vertically arranged front panel 1 of an electronic device there are several openings 2 fil ": key buttons 3, 3" arranged next to one another in a row. The key buttons 3, 3 ′, which in the front view are larger () in width than height, are dimensioned in such a way that they do not touch the walls of the openings 2 and their control surfaces 4 protrude from the plane of the front wall 1. The key buttons 3, 3 'are part of a one-piece injection-molded part 5 made of an elastic plastic, which has a strip-shaped retaining rail 6 which extends over the length of a row of keys and which is connected to the key buttons 3, 3' via webs 7. To achieve greater elasticity, the webs 7 are designed so that they taper towards the buttons.

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BLAUPUNKT-WERKE GMBH

te e e e

PLI-Hi Pieper / TEX2-Kh - 4 - 15.8.1985

R.No. 1883

On the upper longitudinal side of the holding rail 6 eyes 8 are formed, the ψ Rand.zonen are provided with a slot 9. The eyes 8 are assigned to the rear Tl seif.e of the front wall 1 molded pins 10, which together with

the bores 11 of the eyes 8 form locking elements with which the retaining rail 6 is attached to the rear of the front wall 1 like a push button.

On a printed circuit board attached to the chassis 12 of the device

"* Tip switches 14 are arranged in such a way that their switch plungers 15 are directly behind the backsides facing away from the control surfaces 4

Key buttons 3, 3 ^V are located.

If the control surface 4 of a button 3, 3 ^{1 is} actuated, the button gives way against the restoring forces of the web 7 and the holding rail 6, the web 7 being subjected to bending and the holding rail being subjected to torsion. The switch plunger 15 is pressed in and the tip switch is actuated.

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The molded part 5 made of plastic can be contained in the key buttons 3, 3 ' ι can be assembled and disassembled simply by clipping.

Claims (6)

Expectations Button arrangement for tip switches, in the openings in the front wall of an electronic device several key buttons movable perpendicular to the plane of the front wall are provided next to and / or one above the other are arranged with their rear sides facing away from the control surfaces in front of switch plungers associated with them are, characterized, that the key buttons (3, 3 ') are part of a one-piece injection-molded part (5) are made of elastic plastic, which extends over the length of a row of keys over webs (7) with the key buttons (3, 3 ') connected, behind the front wall (1) attachable retaining rail (6) and the webs (7) and / or sections of the Retaining rail (6) form return springs for the key buttons (3, 3 '). ¹¹ ·· ·· · Ι II III! · ·. I ₁ I BLAUPUNKT-WEKKKOMBH 11 111 PLI-Hi Pieper / TEX2-Kh - 2 - 15.8.1985 R.No. 1883 2. TiiSten arrangement for tip switch according to claim 1, characterized, that the retaining rail (6) has bores (11), those on the back the front wall (1) molded pins (10) are assigned and that the bores (11) and pins (10) are designed such that the retaining rail (6) can be fastened to the front wall (1) like a push button is. 3. button arrangement for tip switch according to claim 2, characterized in that the bores (11) through in the Ranäbereich the retaining rail (6) are formed integrally with eyes (8). 4. button arrangement for tip switch according to claim 3, characterized in that that the edge zones of the eyes (8) each have a slot (9). 5. button arrangement for tip switch according to one of claims 1 to 4, characterized, that between each key button (3, 3 ') and the holding rail (6) at least one web (7) is provided. 6. button arrangement for tip switch according to claim 1 or claim 5, characterized, that the thickness of the web (7) tapers from the holding rail (6) to the key button (3, 3 ').