COMBINED HANDLE AND LOCKING MECHANISM FOR A DASHBOARD MOUNTED APPARATUS SUCH AS A CAR RADIO

Abstract: A combined handle and lock mechanism for a dashboard mounted apparatus, such as a car radio, comprises a slide (10) displaceable in a guide (5-9) on either side of the apparatus (1), the outer end of each slide being made as a handle (29) and the inner end of each slide cooperating with a latch member (20) to lock the apparatus in a cassette for example. The slide has an inserted position, in which it is locked against being pushed out, at the same time as the latch member is blocked in the locked position. When the slide is pushed in further the latch member and the slide are unlocked so that the slide handle is accessible for pulling out the apparatus.

Description: Combined handle and locking mechanism for a dashboard mounter! apparatus such as a car ra' io. The present invention relates to a combined handle and lock mechanism for a dashboard mounted apparatus such as a car radio or the like, comprising a latch member which can be moved into and out of engagement with a cooperating block- ing means fixed relative to the dashboard. With the increasing complexity and costliness of car radios , it has become common practice to mount the radio in a theft preventive cassette in the dashboard, so that the driver can take the radio with him when leaving the car. The requirements placed on such a cassette installation are firstly that the apparatus must be held securely in the cas¬ sette so that it does not vibrate and rattle, and secondly that the apparatus must, with a few simple manipulations, be able to be inserted and locked,as well as unlocked and re- moved, rom the cassette. In the cassette installation described in DE OS 29 03 the apparatus housing itself is provided on opposite sides wi spring tongues and the cassette (the frame portion) mounted permanently in the dashboard is provided with recesses to fit the tongues, into which the tongues snap when the apparatus i inserted into the cassette. In order to remove the apparatus, the spring tongues must be moved out of the cassette recesses This is done with the aid of a pair .of separate U-shaped rods which are inserted through openings in the front plate of the apparatus and thereby push the tongues out of the recesses at the same time as the rods hook on to the tongues, to then be used as handles to pull the apparatus out of the cassette. One of the disadvantages of this arrangement i? however that one must always keep track of a pair of locse components, wit out which it is very difficult to remove the apparatus. The purpose of the present invention is to achieve a mechanism of the type described above, without any loose or protruding parts, which is simple to handle and holds the apparatus securrely and rattle-free in place in the dash- • board. This is achieved according co t!τ_ invention by means of a mechanism, which has a slide guide to be se-curely fastened to the apparatus, a slide displacably mounted in the slide guide and having a handle shaped end portion, a latch member displacably mounted relative to the slide guide, and interacting portions of the slide and the latch member, said portions, in a predetermined inserted position of the slide, holding the latch member in a locked position and bloc ing the slide against being pushed out but permitting further insertion of the slide from said predetermined position to di engage the latch member and permit the slide to be pushed out past said predetermined position to the outer end position in which the handle protrudes outside the slide guide. The invention will be described in more detail with re ference to an example shown in. the accompanying drawing, wh the figure shows a side view of a car radio with a partially cut away handle and locking mechanism according to the in- vention. In the figure, 1 designates an apparatus case and 2 a front plate which in a conventional manner frames the front of the apparatus and forms a transition to the surrounding dashboard. A mechanism according to the invention (generally designated 4) is screwed to either side 3 of the apparatus case. The mechanism 4 comprises a bottom plate 5 and a cover plate 6, which are screwed securely to each- other. The bottom plate 5 has pressed raised portions 7 , so that a space is formed between the plates. In the space, a pair of guides 6 and 9 of a low friction material, preferably a plastic material, are fixed and between them tnere is guided a slide 10. The slide 10, which is somewhat resilient and suitably consistsof the same material as the guides 6 and 9, has a lower guide surface 11, which slides against a guide sur¬ face 12 on the lower guide 8, and upper guide surfaces 13,14, which slide against guide surfaces 15, 16, respectively, on the upper guide 9. The slide 10 is guided with a slight clear ¬ ance (not shown) between the guides 8 and 3 and is at its in ¬ nermost end made with a curved resilient arm 17, which slides against a surface 18 on the lower guide 3. The arm 17 is some what pretensioned when the slide is in its mounted state, so that it presses the slide upwards to take up the play betwee in the first place, the guide surface 14 of the slide and the guide surface 16 of the upper guide 9. The slide 10 cooperates with a latch member 20, which is swiπgably mounted in the space between the plates 5 and 6. The latch member 20 consists of an L-shaped plate and has a latch portion 21 made for engagement with a suitable block¬ ing means (not shown) in a cassette or the like in the dash- board. The latch member 20 has a portion 22 with a recess 23 in which a protrusion 24 on the slide 20 engages in the po¬ sition shown with solid lines in the figure. The latch membe 20 and the protrusion 24 are made o-P metal, and the protrudi portion 24 has a T-shaped portion 25 fitted into a T-shaped groove in the slide 10. In the position shown in the figure, the latch member 20 is in its locked position and the slide 1 is locked against movement to the left. A folded leaf spring 26 and a spring tongue 27 assure freedom from play. The fron plate 2 has a slot for each slide 1 0 and in the locked po- sition, each slide is pushed in so far that its outer end is flush with the surface of the front plate. The latching portion 21 of the latch member 20 engages in this position with a fixed blocking means (not shown) in a theft preventive cassette permanently mounted in the dashboard. The above des cribed arrangement provides a certain amount of resilience i the engagement of the latch means because tne inner end of the slide, upon clockwise rotation of the latch 20, can be displaced somewhat against the effect of the spring force of the arm 17. This means that the later; in its locked po- sition will be under a certain amount of spring tension due to the force of the spring arm 17, which assures freedom fro play and eliminates all rattling. When Lhe apparatus is to b removed, the slide 10 is pushed in only as far as is needed for the protrusion 24 to slide out of the recess 23. In prac tice, all that is required is to push the slide in several millimeters. Since the end of the slide is flush with the front plate 2, an add such as a coin or the like is re¬ quired to push in the slide. When the protrusion 24 slides ' out of the recess 23, the folded spring 26 can push the slid 10 outwards to the position shown with desn-dot lines in the figure, at the same time as the slide swings in the latch so that it disengages the blocking means. The slide is pro¬ vided at its outer end with a recess 28 forming a handle 29, which in this position projects outside of the front plate so that the apparatus can be easily removed. When reinserting the apparatus, each slide 10 is only pushed in until the end lies flush with the front plate 2, and the protrusion 24 snaps into the recess 23. This can be done without any aids. The design according to the invention provides a simple and reliable mechanism with only two movin parts. The mechanism can be made very thin, in practice only a few millimeters thick.

Claims: 1. Combined handle and lock mechanism for a dashboard mounted apparatus such as a car radio or the like, comprisin a latch member which can be moved into and out of engagement with a cooperating blocking means fixed relative to the dash board, c h a r a c t e r i z e d by a slide guide (5-9) to be securely fastened to the apparatus (1), a slide ( 0) displacably mounted in the slide guide and having a handle-shaped end portion 29) , a latch member (20) displacably mounted relative to the slide guide, and interacting portions (24,23) of the slide and the latch member, respectively, which portions, in a predetermined inserted position of the slide, hold the lat member in a locked position and block the slide against bein pushed out but permit further insertion of the slide from sa predetermined position to disengage the latch member and per mit the slide to be pushed out past said predetermined posi¬ tion to an outer end position in which the handle protrudes outside the slide guide. 2. Mechanism according to Claim 1, c h a r a c t e r i z in that spring means (17) are arranged, against the spring force of which the movable latch member (20) is limitedly mo in its locked position, to provide a spring bias in the engag between the movable latch member andthe fixed blocking means 3. Mechanism according to Claim 1 or 2, ch a r a c t e r ized in that the slide guide (5-9) comprises a pair of plate (5, 6) joined to each other with a small space between them, said plates being fasteπable to the apparatus with said slid (10) being displacable in said space, that the latch member (20) is swingably mounted in the space and has a latching portion (21) which protrudes in said locking position, out o said space. 4. Mechanism according to Claim 3, c h a r a c t e r i z in that the slide (10) is guided with a small transverse pla in the slide guide and is made with a spring member (17) whi slides against a guide surface (18) to take up the play. 5. Mechanism according to Claim 4, c h a r a c t e r - i z e d in that the slide (10) is spring loaded outwards and is made with a protrusion (24), which in the locked position of the latch member (20) extends into a recess (23) in the latch member and is held in this position under the influence of the outwardly directed spring force, and that said spring member (17) together with said play permits some resilient movement of the latch member in the locked position . 6. Mechanism according to Claim 5, c h a r a c t e r ¬ i z e d in that the slide (10) is -formed of a thin plate of resilient material and that the spring member (17) is made in one piece w.ith the plate.

Inventors: STILLBAECK OLA, STILLBAECK, OLA
Applicants: VOLVO AB, AB VOLVO
Application year: 1985
Main classification: B60R11
IPC codes: B60R11, H05K5