DE29515644U1 - Telephone handset - Google Patents

Description

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Description: *.·

The invention relates to a two-shell *··

Telephone handset for an automatically controlled assembly, *l» the housing of the acoustic transducers and their wiring .*

as well as a weight that increases the support. ·.;

Handsets of telecommunications terminals are _#
preferably composed of two housing shells, which form the "

acoustic transducers. To ensure the transducers are secure and .

To attach the handset acoustically tight, holders are used."

used, which fix the converters in their position by means of appropriate contours and screwing *·· the housing shells.

The housing halves can be separated using locking and screw elements
connected to each other. A tight seal is
the parting line and a torsional strength between both
housing halves. A tight seal of the joint
is made by form-fitting interlocking circumferential
Contours of the housing halves. The torsional strength
is necessary to avoid noise interference caused by
mechanical influences, e.g. when pressing the handset,
can occur when the housing halves are
Separating joints rub against each other.

For this purpose, it is known to use a housing shell with crossbars and the
other housing shell with skids so that partial
Support surfaces are formed (DE 195 07 733).

Another problem is the increasing use
lighter plastics for the housing shells and in the
Reduction in the size of the acoustic transducers. This makes the
Handsets have become lighter. This can lead to insufficient
Contact force of the handset on the plunger of the
hook switch.

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Modern production also requires automatic _t

Assembling and testing a complete handset. This involves ·»

For manufacturing reasons, the handset is based on the } ₀

Lower shell assembled by machine, whereby the holders for /*

the acoustic transducers are preparatory placed in the upper shell \,

and remain fixed in position during assembly; ;

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The invention was based on the object of designing the housing shells I of a handset in such a way that they can be assembled mechanically, that in the assembled state they have a torsional strength which does not allow the housing shells to crack even under extreme stress, that the contact force of the handset is increased and that a secure position of the holders for the transducers is ensured during assembly.

This problem is solved by the combination of features as set out in the characterizing part of the first protection claim. Further advantageous measures are the subject of the subclaims.

The invention is explained in more detail below using a drawing consisting of six figures. The drawing shows

Fig. 1 shows the section through a handset, Fig. 2 shows the view of the lower shell of the handset after

Figure 1, the
Fig. 3 the view of a holder for an acoustic

Converters that
Fig. 4 is a section through the holder of Figure 3 along the line 4-4 in Figure 5,

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Fig. 5 the bottom view of the holder and the _{# t}

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Fig. 6 the enlarged perspective view rotated by 90° *·

Partial view of the lower handset area of the .·&ldquor; Figure 1.

In all figures, the same shapes have the same reference symbols.

The handset according to Figure 1 and Figure 2 consists of an upper shell 10 and a lower shell 20. The lower shell 20 accommodates the acoustic transducers 21, 22 during automatic assembly. A pressure piece 23 as a fixing means is placed on a cross-shaped web (not shown) of the upper shell 10, which is held in place by a press fit. The pressure piece 23 serves to secure the position of the acoustic transducer 22.

In order to fix the acoustic transducer 21 in its position, a holder 11 is provided as shown in Figures 3, 4 and 5. This holder 11 is made of an elastic plastic. It has two slots 12 on both sides, which are surmounted by triangular webs 14 that are slotted in the vertical direction. The slots of the triangular webs 14 are conically narrowed towards the tip of the triangle. A longitudinal rib 16 is also provided to stiffen the pressure surface 15. The holder 11 is mounted with its slots 12 on ribs 17 of the upper shell 10. The conically narrowed slots of the webs 14 create a clamping attachment. The upper shell provided with the pressure piece 23 and holder 11 can thus be mounted in the vertical direction without the risk of the fixing means for the acoustic transducers 21, 22 falling out.

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For fixing the cable connections between the _mt

acoustic transducers 21, 22, two **» cable bridges 24 are provided in the lower shell 20, between whose resilient legs the cable is guided.

The upper shell 10 is mounted to the lower shell 20 via guide pins 30 that slide into rectangular tubes 31 of the latter. The two shells 10 , 20 have hooks 32, 33 that lock the shells 10, 20 together. When the upper shell 10 and lower shell 20 are put together, the hooks 32, 33 move sideways towards each other and lock in their final position, as shown in Figure 6. The hooks 32, 33 are arranged parallel to the long sides of the shells 10, 20. This ensures that the locking is maintained even when there is strong twisting around the longitudinal axis of the handset.

To increase the tracking force of the handset, it is fitted with a weight 40 which is encapsulated in plastic and thus preferably embedded in the lower shell 20.

Claims (4)

P rotective claims: * *, 1. Two-shell telephone handset for an _{automatically} controlled assembly, which is used to record the acoustic ** Converters and their wiring as well as one of the support ,·, increasing weight, characterized by .",' a pressure piece (23) for an acoustic transducer (22), which is held in a press fit on a cross-shaped web of the upper shell (10) of the I ', handset, b. a holder (11) for the other acoustic transducer * _t \ (21) with slots (12) surmounted by slotted · triangular webs (14) which rests on ribs (17) of the upper shell (10), c. Guide pins (30) of the upper shell (10) and rectangular tubes (31) of the lower shell (20) for their automatic assembly, d. Hooks (32, 33) in the upper shell (10) and the lower shell (20) which cause an automatic mutual locking of both shells (10, 20) and e. a weight (40) embedded in the lower shell (20). 2. Two-shell telephone handset according to claim 1, characterized by conically narrowing slots in the triangular webs (14) of the holder (11). 3. Two-shell telephone handset according to claim 1, characterized by a longitudinal rib (16) for stiffening the pressure surface (15) of the holder (11). 4. Two-shell telephone handset according to claim 1, characterized by a parallel arrangement of the hooks (32, 33) to the long sides of the shells (10, 20).