DE102020006058A1 - Device with a housing and a component that can be pivoted against the housing - Google Patents

Abstract

A device is described with a housing and a component that can be pivoted against the housing, the at least one pivot bearing of the component being designed as a two-component injection molded part, the device having at least one bearing module which is designed as an injection molded part consisting of two plastic materials, wherein a first plastic material of the bearing module forms an outer rotary ring of the pivot bearing, and wherein a second plastic material of the bearing module forms a bearing module body and an inner rotary ring of the pivot bearing in one piece, there being a bearing clearance between the inner and the outer rotary ring which is based on shrinkage of the second plastic material , wherein a portion of the component is connected without play to the bearing module body, and, and that the outer rotary ring is fixed to the housing.

Description

The invention relates to a device with a housing and a component that can be pivoted relative to the housing, the at least one pivot bearing of the component being designed as a two-component injection-molded part.

In the case of devices which have a component which can be pivoted against a housing, the quality of the pivot bearing or bearings is of decisive importance for the actuation feel. In general, what is desired here is a jam-free bearing with as little bearing play as possible.

It is known to produce swivel bearings as a two-component injection molded part from various plastics, with the shrinkage of a plastic material providing the required bearing play.

This is how the German Offenlegungsschrift describes DE 36 37 462 A1 a method for manufacturing the pivot bearing of a sun visor. However, the intention here is to generate an inhibiting force between the bearing components as a result of the shrinkage behavior of a plastic material.

From the German Offenlegungsschrift DE 10 2006 034 705 A1 discloses a method for producing a pivoted wiper arm. It is provided here that the component to be pivoted also forms the pivot pin or pivot pins for the pivot bearing or pivot bearings. The disadvantage here is that the material from which the component is made also forms a bearing component at the same time, so that compromises generally have to be made when choosing a material that is well suited for both purposes.

The object was to create a device with an improved, particularly low-backlash pivot bearing which avoids the aforementioned disadvantages.

This object is achieved according to the invention by the characterizing features of claim 1.

According to the invention, the device thus has a bearing module which forms at least one bearing point using two-component injection molding technology. The at least one bearing point has an outer rotary ring made of a first plastic material, which is rotatably mounted on an inner rotary ring made of a second plastic material. The inner rotary ring is designed in one piece with a bearing module body to which a component to be pivoted is connected without play.

The bearing effective for the device is ensured by the bearing module designed as a two-component injection molded part. The required bearing play is caused by a shrinkage of the second plastic material and is therefore established between this and the first plastic material. It can be reliably specified through the appropriate choice of materials and process parameters.

The bearing module thus decouples the component to be pivoted from its bearing point on the housing and forms at least one force-free bearing point in order to keep friction as low as possible.

In the fully assembled state, the outer rotating ring of the pivot bearing can be held in its position in the housing under a slight preload, for example between two parallel fastening arms. A suitable design of the first plastic material ensures that the deformation caused by the clamping forces is not greater than the bearing play set in the component itself.

In order to minimize such clamping forces, it is very advantageous to design the connection between the housing and the outer rotary ring as a purely positive or material connection.

It is particularly advantageous to provide that the at least one outer rotary ring is interlocked with the associated inner rotary ring in a form-fitting manner. This achieves an axial fixation of the bearing module.

A preferred embodiment of the device consists in providing a bracket made of plastic or metal as the component to be pivoted.

It is known to provide a stabilizing bracket for large, linearly guided control elements. Examples of controls with a supporting bracket are space or space keys on computer keyboards. Such a button is, for example, in the German Offenlegungsschrift DE 24 04 895 A1 described. With appropriate dimensioning, the bracket ensures reduced key tilting.

In such an embodiment, the forces are mainly transmitted via the bracket. In order to prevent additional bearing play in the system, it is connected to the bearing module without play.

To store an operating element, for example a switch button, a further bearing point can also be provided on the bearing module, which can be designed in the same way as the one previously described.

• 1 eine auf skizzenhaft dargestellte Vorrichtung,
• 2 eine Lagerstelle der Vorrichtung in einer Schnittansicht.

An exemplary embodiment of the invention is to be illustrated and explained below with reference to the drawing. Show it

• 1 a device sketched on,
• 2 a bearing point of the device in a sectional view.

the 1 shows essential parts of a device according to the invention. A bearing module 1 is shown, which is rotatably mounted on a section of a housing 3 . For this purpose, the bearing module 1 forms a pivot bearing 2 on a bearing module body 10 which is connected to the housing 3 .

The swivel bearing 2 consists of two sections lying inside one another, the outer section being ring-shaped and referred to below as the outer rotary ring 8 . The inner section of the pivot bearing 2 in the form of a ring or a circular disk that bears against the inner surface and is referred to below as the inner rotating ring 9 is designed in one piece as part of the bearing module body 10 .

The outer rotary ring 8 on the one hand, and the bearing module body 10 and thus also the inner rotary ring 9 on the other hand, are produced from two different plastic materials 5, 6 by two-component injection molding. The plastic materials 5, 6 and the processing times and temperatures are selected in such a way that material shrinkage of the second plastic material 6 forming the storage module body 10 compared to the first plastic material 5 forming the outer rotary ring 8 causes the outer diameter of the inner rotary ring 9 to be slightly smaller than the inner diameter of the outer rotating ring 8.

By a suitable choice of the plastic materials 5, 6 and the above-mentioned process parameters, which can be determined empirically, it can be reliably achieved that the outer and the inner rotary ring 8, 9 are connected to one another without force and jamming and with only very little bearing play . This creates a pivot bearing point with excellent properties.

In order to establish the connection between the housing 3 and the bearing module 1, the housing 3 has two parallel fastening arms 11, 12 which enclose the outer rotary ring 8 of the pivot bearing 2. For this purpose, the outer rotary ring 8 can be held in position by the fastening arms 11, 12 under a slight pretension. Appropriate design of the first plastic material 5 ensures that the deformation of the outer rotary ring 8 caused by clamping forces is not greater than the bearing play set on the pivot bearing 2 itself.

In order to minimize such clamping forces, the connection between the housing 3 and the outer rotary ring 8 of the pivot bearing 2 can preferably also be designed as a purely form-fitting or material-fitting connection.

To produce a positive connection, not shown here, connecting means can be formed on the fastening arms 11, 12 and/or on the outer circumference of the outer rotating ring 8, which are suitable for producing a positive connection. Such connecting means can be, for example, screw sockets for producing a screw connection, plastic pins for hot caulking, clips or the like. Such connecting means are considered to be known in principle, so that a pictorial representation in the drawing was dispensed with.

That in the 1 Storage module 1 shown has a further pivot bearing 2 'on which a control element, not shown here, such as a button can be movably mounted. The structure of this additional pivot bearing 2' is identical to that of pivot bearing 2 and accordingly also has an outer rotating ring 8' made of the first plastic material 5, as well as an inner rotating ring 9', which is designed in one piece with the bearing module body 10 and is made of the second plastic material 6 consists.

the 2 illustrates the design of the pivot bearing points 2, 2 '; here as an example a section through pivot bearing point 2.

It can be seen that the outer rotating ring 8 and the inner rotating ring 9 each form two mutually stepped sections 13, 14 in the axial direction, which differ from one another by the associated radial inner diameter of the outer rotating ring 8 and the radial outer diameter of the inner rotating ring 9. The outer and the inner rotary ring 8, 9 are thus interlocked with one another in a form-fitting manner, as a result of which a very small axial bearing play can be achieved.

Both the axial and the radial bearing play are mainly caused by the shrinkage of the second plastic material 6 compared to the first plastic material 5 determined. It can be set very low by the choice of plastic materials 5, 6 and the processing parameters, so that in the 2 no recognizable distances between the edge sections of the outer rotating ring 8 and the inner rotating ring 9 are drawn.

The inner rotary ring 9 is an integral part of the bearing module body 10, which holds a component 4 without play. In particular, the component 4 is designed here as a bracket which has a longer straight section which is aligned with the axis of rotation of the pivot bearing 2 and which has a shorter angled section 4' which is connected to the bearing module body 10 without play by being connected to the bearing module body 10 latched or is encapsulated by the second plastic material 6 from which the storage module body 10 is made.

The bearing module 1 is connected to the housing 3 by inserting the outer rotary ring 8 of the pivot bearing 2 between two parallel fastening arms 11, 12 of the housing 3 and connecting them to them by connecting means (not shown here) to produce a positive or material connection (e.g. by a glue) is connected.

In an analogous manner, the second pivot bearing 2' present on the bearing module 1 can be used for connection to an actuating element, not shown, such as a switch button. A preferred application also provides for two storage modules 1 arranged in parallel, which together form storage points for a component 4 and are connected to one another via the component 4 .

Reference List

1

storage module

2, 2'

swivel bearing

3

housing

4

component

4'

angled section

5

first plastic material

6

second plastic material

8, 8'

outer rotating ring

9, 9'

inner rotating ring

10

storage module body

11, 12

mounting arms

13, 14

sections

QUOTES INCLUDED IN DESCRIPTION

This list of documents cited by the applicant was generated automatically and is included solely for the better information of the reader. The list is not part of the German patent or utility model application. The DPMA assumes no liability for any errors or omissions.

Patent Literature Cited

• DE 3637462 A1 [0004]
• DE 102006034705 A1 [0005]
• DE 2404895 A1 [0015]

Claims (6)

Device with a housing (3) and a component (4) that can be pivoted against the housing (3), the at least one pivot bearing (2) of the component (4) being designed as a two-component injection-molded part, characterized in that the device has at least one bearing module (1) which is designed as an injection molded part consisting of two plastic materials (5, 6), with a first plastic material (5) of the bearing module (1) forming an outer rotary ring (8) of the pivot bearing (2), and with a second plastic material (6) of the bearing module (1) integrally forms a bearing module body (10) and an inner rotary ring (9) of the pivot bearing (2), so that there is bearing play between the inner and outer rotary ring (8, 9) which is on a Shrinkage of the second plastic material (6) is based on the fact that a section of the component (4) is connected without play to the storage module body (10), and that the outer rotary ring (8) is fixed to the housing (3). device after claim 1 , characterized in that the outer rotary ring (8, 8 ') and the inner rotary ring (9, 9') are interlocked with each other in a form-fitting manner. device after claim 1 , characterized in that the bearing module (1) forms a further pivot bearing (2'). device after claim 1 , characterized in that the further pivot bearing (2 ') stores an operating element. device after claim 1 , characterized in that the component (4) is designed as a bracket made of metal or plastic. device after claim 1 or 5 , characterized in that the device has two storage modules (1) which are connected to one another via the component (4).

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