DE19707437A1 - Plastic housing for servo equipment of radio=control system for model vehicles - Google Patents

Abstract

In the manufacture of a housing for the servo equipment of a radio-controlled unit for a model vehicle, a cut plastic film section, preferably of acrylonitrile-butadiene-styrene copolymer(ABS), is thermoformed in a solid phase pressure forming process to produce a housing shell(27) with a collar-like region(26) at the surrounding edge and after installing the servo equipment(29) a flat film section(24) is welded, bonded or clipped onto the collar-shaped region. In an process variation two separate housing shells are thermoformed, the servo equipment is positioned inside and the shells are placed together with their open edges overlapping before welding, bonding or clipping together. A housing (claimed) comprises a cylindrical or prismatic shell(27) of thermoformed plastic film, especially ABS, with a surrounding edge region(26) on the open side and a flat film cover(24) welded, bonded, or clipped to the edge region. Openings or bores(28,28') in the housing parts a nd/or the cover(24) allow passage of the servo equipment shaft(29) and/or cables. A further claimed housing comprises two thermoformed shells of plastic film, especially ABS, each with flange-like edge areas around the opposing open ends which are bonded, welded or clipped together to connect both shells. In another housing design the surrounding edge area of one housing shell is slightly widened relative to the second shell, enabling one to slide inside the other before connecting both shells as previously described.

Description

The invention relates to a method of manufacture a multi-part housing for the radio Receiver assigned to a radio remote control device Nete rowing machine of a vehicle model, one so-called servo device and the servo device housing se itself.

With the advent of ever smaller flights The development of smaller and lighter components of the remote control system hand in hand. The system installed in the model exists from a receiver, a rechargeable battery (or battery) and one of the control functions the number of servo devices.

The servo device usually consists of one Electric motor, a reduction gear and egg a coupled potentiometer, one Control electronics, bearing shafts and one Injection molded housing with housing screws.  

Assuming a very light servo from e.g. B. 11 g of weight, so account for that Injection molded housing and the housing screws approx. 4.8 g, i. H. approx. 43% of the total weight. As for From an injection mold, material thicknesses of 1 to 1.5 mm are required, this type of Housing can hardly be produced more easily.

For use in extreme models where it for every gram of weight, it is common to dispense with part of the servo housing, or the servo devices become completely without housing used. However, this presupposes that La gears of the gears are sufficiently firm the motor plate (middle part of the housing) is held, so that there is no counter bearing of the waves can be tet.

If the servo devices are used without a housing, then it is easily possible that if improper Handling Components of the servo can be damaged or parts in the reduction gear ten, which may be used to block the servo being able to lead. In addition, it is difficult a servo device open in all components in Mon dell to fix, because suitable holder gene missing.

The use of a servo device without a housing may seem thus as an emergency solution to the Ge minimize the importance, but not for the solid Model maker.  

A path to a component that encloses and protective housing is the use molded plastic housing parts. At the Her position of the usual housing in injection molding Thermoplastics are inserted into molds splashes and demolded after cooling.

The object of the present invention is to achieve reasons, a process for producing a casing ses made of plastic, which is particularly light and is inexpensive to manufacture and at the same time egg ne has a comparably high rigidity.

This object is achieved by a ver drive solved, consisting of a first procedure step in which a film cut from a Plastic, preferably an ABS (acrylonitrile Butadiene-styrene copolymer, e.g. B. "Terluran from BASF) through pull forms (solid phase pressure for ming) is deep drawn to a housing shell where in the case of a flat collar moderate area in the area of the peripheral edge is closed, and a second procedure step where after installing the servo device and the associated electronics in the housing scha le a flat film cut on the collar-shaped placed on the part and welded to it, is glued or clipped.

Preferably, the ver with the housing shell bindable film cut with openings or off savings provided by the shaft of the servo  device and / or its electrical supply lines for the servo device can be passed through.

In an alternative manufacturing process a multi-part housing for a Funkemp catcher of a remote control system of a driving Test model associated servo device is in a In the first procedure, a film cut was made a plastic, preferably an ABS (Acrylonitrile-butadiene-styrene copolymer, e.g. "Terluran" from BASF) by drawing molds (solid phase pressure forming) to form a housing shell all-round flat edge section is deep-drawn and in a second step a second Ge housing shell with all-round flat edge section a second plastic film blank Drawing molds are deep drawn and are in a third The procedure followed both housing shells Insert the servo device with its open knurls overlapping or lying on top of each other other glued, welded or clipped.

One or both housings are advantageous provide shells with openings or recesses, through which the shaft of the servo device and / or its electrical leads can be passed.

According to the invention there is the housing for the servo device from a cylindrical or prismatic Housing shell made from a deep-drawn plastic lie, preferably made of ABS (acrylonitrile butadiene Styrene copolymer) with one on its open Side arranged peripheral edge and egg  nem closing the opening, with the edge par tie glued, welded or clipped Cover part made of a flat plastic film Blank, the housing parts and / or the Cover part with openings or holes for the Passage of the output enclosed by the housing is provided.

An alternative embodiment of the housing for the servo device consists of a cylindrical one or prismatic first housing shell from one through drawing molds deep-drawn plastic film, preferably made of ABS (acrylonitrile butadiene styrene Copolymer) and a cylindrical or prismatic second housing shell made by pulling form deep-drawn plastic film from a ver similar material, with both housing shells with the circumferential edge parts of each other glued open sides glued together, are welded or clipped.

The invention allows a wide variety of designs opportunities for; two of them are in the an hanging drawings purely schematically posed, showing:

Figure 1 is a conventional housing part with a molded from a plastic upper part 1 and lower part 2 , the four housing screws 4 , an output 3 and the set lever 5 . the support surfaces 6 are used for assembly,

Fig. 2 shows a deep-drawn housing with vertical Tren-voltage level with the front housing part 7, Ge häuserückteil 8 and round edge 9, which as well is used to bond the two parts for the assembly of the servo device,

Fig. 3 is a deep-drawn housing having a horizontal division plane with the upper housing part 10, the lower housing portion 11 and peripheral rim 12, which as well is used to bond the two parts for the assembly of the servo device,

Fig. 4 is a two-part housing after OF INVENTION dung with circumferential Verbindungsflan rule,

Fig. 5 shows a two-part housing with overlap the edge parts and

Fig. 6 is a deep drawn from a film seschale with a flat cover part.

The thermoforming process uses a plastic film (PVC, ABS or similar material) heated and drawn over a positive form or with pressure in pressed a negative form. After cooling and peeling hen you have a thin-walled image of the Posi tiv- or negative form. Leave in the deep-drawing process itself materials of only 0.2 mm material Process starch without problems. Depending on which a deep-drawn housing there can be in the form of reinforcement profiles be incorporated. If you leave the molding  circumferential edge on the deep-drawn part, so this used as a support or for attachment will.

While described in the prior art Example of an 11 g servo device housing Weighing screws approx. 4.8 g, it brings an equal large housing, according to the present procedure manufactured, depending on the strength of the used Thermoforming material to only 0.6 to 0.9 g. The Housing parts can be glued directly together will.

Assuming a weight of the thermoformed housing from 0.8 g, this means that the weight the housing by 4 g. Through the Use of a thermoformed housing will be used in this Trap 83% of the housing or 36% of the servo total weight saved.

A Ge completely enclosing the servo device As a rule, the house must be divided into at least two parts; the separation level can vary depending on the intended use in the horizontal, vertical or another Level.

The potential for the greatest possible weight reduction tion is further improved if in a deep pulled housing not just a single servo advises, but housed several servo devices will. Starting from the example of a servo device with 11 g weight and a case with 0.8 g Ge important this means that when executing with  two servo devices in a common housing shell only a widening of the equipment housing is required, which is a weight gain of about 30% for the case.

As shown in Fig. 4, the multi-part housing can be formed from two deep-drawn half-shells 13 , 14 , with the peripheral edge parts 17 , 18 of the same size, both half-shells can be glued or welded together, such that the mounting holes 15 , 15 ',. . . or 16 , 16 ',. . . flee with each other. In the embodiment of Fig. 5, the two half-shells 19, provided with circumferential edge portions 21, 22, 20, which are dimensioned such that both half-shells 19, 22 in the direction of arrow A are pushed into one another. The half-shell 19 is also provided with an abste standing collar 23 , which is used to attach the housing to the vehicle model.

In the embodiment according to FIG. 6, the flat cover 24 is configured in such a way that it can be fitted and glued into the frame-shaped edge recess 15 running around it. The flange-shaped edge portion 26 of the deep-drawn housing shell 27 is with Boh stanchions 28 , 28 ',. . . provided that serve to attach the housing shell 27 to the vehicle model. In the housing shell 27 , the servo device 29 is inserted, the output shaft 29 of which is guided through the bore 30 in the film blank 24 .

Claims (7)

1. Process for producing a multi-part Housing for the the radio receiver Rudder assigned to radio remote control device machine of a vehicle model, a so-called called servo device, with a first procedure step in which a foil cut out a plastic, preferably an ABS (Acrylonitrile-butadiene-styrene copolymer, e.g. "Terluran" from BASF) by drawing molds (solid phase pressure forming) to a Ge housing shell is deep drawn, the Ge house shell of a flat collar-shaped Batch around the peripheral edge is closed, and a second procedure step, after installing the Servoge guesses a flat film in the housing shell Cut on the collar-shaped part sets and welded to it, glued or clipped. 2. The method according to claim 1, characterized records that in the with the housing shell connectable film cut and / or in the deep-drawn housing shell even openings or cut-outs, through which the shaft of the servo device and / or its electrical leads for the servo device can be passed through.   3. Process for producing a multi-part Housing for the the radio receiver Radio remote control device associated rudder machine of a vehicle model, a so-called called servo device, with a first procedure step in which a foil cut out a plastic, preferably made of ABS (Acrylonitrile-butadiene-styrene copolymer; e.g. "Terluran" from BASF) by drawing molds (solid phase pressure forming) to a he most housing shell is deep drawn and in A second procedure was followed by a second Housing shell made of a second plastic lien cut deep-drawn using drawing dies and in a third step both housing shells after inserting the Servo devices with their open edges over glued together, welded or be clipped. 4. The method according to claim 3, characterized records that in one or both housing scha len openings or cutouts through which the shaft of the servoge councils and / or its electrical leads can be passed through. 5. Housing for the radio receiver of a radio Rudderma assigned to the remote control device machine of a vehicle model, a so-called servo device, consisting of a cylinder or prismatic housing shell a thermoformed plastic film, preferred  made of ABS (acrylonitrile butadiene styrene Copolymer) with one on its open side arranged peripheral edge and one closing the opening, with the margin par tie, glue, weld or clip Most cover part made of a planar plastic film cutting, with the housing parts and / or the cover part with openings or Holes for the passage of the from the housing enclosed servo motor is provided. 6. Housing for the radio receiver of a radio Remote control device of a vehicle model assigned rowing machine, a so-called Servo device consisting of a cylindrical or prismatic first housing shell an art deeply drawn by drawing forms fabric, preferably made of ABS (acrylonitrile Butadiene-styrene copolymer) and a cylin drical or prismatic second housing shell made from a deep-drawn mold NEN plastic film from a comparable Material, both housing shells with the circumferential parts of their towards each other returned open pages glued together, are welded or clipped, which is why circumferential edge parts of the two housings are shaped like a flange and the edge areas lying on top of each other that glues, welds or clips are.   7. Housing for the radio receiver of a radio Remote control device of a vehicle model assigned rowing machine, a so-called Servo device consisting of a cylindrical or prismatic first housing shell an art deeply drawn by drawing forms fabric, preferably made of ABS (acrylonitrile Butadiene-styrene copolymer) and a cylin drical or prismatic second housing shell made from a deep-drawn mold NEN plastic film from a comparable Material, both housing shells with the circumferential parts of their towards each other returned open pages glued together, are welded or clipped, which is why circumferential edge part of a housing shell slightly compared to the corresponding second housing shell is expanded.