CN201359506Y

CN201359506Y - Simple/convenient type crossed coil cassette mechanism

Info

Publication number: CN201359506Y
Application number: CNU2009201137222U
Authority: CN
Inventors: 张豪杰
Original assignee: Ningbo Vikeer Electronics Co Ltd
Current assignee: Ningbo Vikeer Electronics Co Ltd
Priority date: 2009-02-10
Filing date: 2009-02-10
Publication date: 2009-12-09
Anticipated expiration: 2019-02-10

Abstract

The utility model provides a simple/convenient type crossed coil cassette mechanism which is mainly applied in indicating mechanisms such as a vehicle electronic meter or other meters, instruments, measuring equipment and the like. The cassette mechanism is composed of an upper skeleton, a lower skeleton, two groups of coils, a hair wire, a PCB circuit board, a rotor and the like. The cassette mechanism changes magnetic flux in the coils by changing the magnitude of current in the coils, and changes the rotating angle of the rotor by mutual induction of magnetic fields, so as to lead a meter pointer to deflect the indicating scale; the upper skeleton and the lower skeleton in the above structure are riveted into one body by a riveting head which is connected with the lower skeleton, a contact pin is arranged on the upper skeleton, the two groups of coils are connected and communicated by the contact pin, and the bottom end of the contact pin is welded with a wave peak of the PCB circuit board into one body; the welding is firm and reliable, which can effectively improve the production efficiency. The improved structure can adopt direct-riveting connection of a knurling copper pin with no need for pressure-welding connection with higher cost, which not only leads simple as well as convenient connection and effectively shortens the processing time, but also avoids the problem that effective positioning cannot be carried out on the connection between the copper pin and the PCB circuit board in the traditional structure.

Description

Simple type cross coil movement

Technical field

The utility model relates to a kind of cross coil movement that is used for indicating mechanisms such as motorcycle, automotive electronics instrument or other various instrument, instrument, measuring equipment, especially a kind of simple type cross coil movement.

Background technology

Cross coil movement is a kind of vitals that is applied in the indicating mechanisms such as vehicle electric instrument, instrument or measuring equipment, its structure comprises formations such as upper skeleton, lower skeleton, two groups of coils, screw type hairspring, PCB wiring board, rotor, described rotor comprises needle shaft, magnet steel, damping oil and steel ball, pointer can be installed in the needle shaft top, hairspring the inner is welded on the needle shaft simultaneously, and the outer end is welded on the upper skeleton.This movement is as the important electron indicating device, though possess higher pointing accuracy, but still there are many defectives in its structure, for example the upper and lower skeleton of movement connects by an annular knurl copper pin crimping mode, copper pin price is higher, the increase production cost, and this copper pin is again to connect conductings for two groups of coils simultaneously, so lower skeleton will be passed through copper nut connection PCB wiring board in the bottom of copper pin, therefore the processing request of this copper pin is inevitable higher, and manufacture difficulty is bigger.In addition, copper pin and PCB wiring board are fixed and can not effectively be located through nut, can't use the wave-soldering welding, and because of the diameter of copper pin end is thicker, even welding, quality also can't guarantee, greatly influences production efficiency.

Summary of the invention

Technical problem to be solved in the utility model is to overcome the defective of prior art and provides that a kind of cost is low, processing is simple and convenient, production efficiency is high, the simple type cross coil movement of firm and reliable connection.

Technical matters of the present utility model is achieved through the following technical solutions:

A kind of simple type cross coil movement, it comprises the upper skeleton and the lower skeleton that connect one, be cross is wound on two groups of coils on the upper skeleton, cover on the outer radome of lower skeleton and be connected PCB wiring board on the lower skeleton, upper and lower frame center is provided with rotor, this rotor is made up of needle shaft, magnet steel, damping oil and steel ball, but be set with the screw type hairspring of recovery of elasticity on the needle shaft, the inner of this hairspring is fixed on the needle shaft, the outer end is fixed on the upper skeleton, and the connection that it is characterized in that described upper and lower skeleton is with riveted joint riveted joint one between the upper and lower skeleton; Also be provided with four contact pins that connect conducting for two groups of coils respectively on the described upper skeleton, the bottom connection PCB wiring board of these four contact pins.

Described contact pin is the nickel plating binding post.

Described contact pin bottom is that contact pin bottom and PCB wiring board weld one through wave-soldering with being connected of PCB wiring board.

Described riveted joint is the upwardly extending conjoined structure of lower skeleton.

Compared with prior art, on of the present utility model, warp is riveted one with the riveted joint of lower skeleton disjunctor between the lower skeleton, and also be provided with the contact pin that connects conducting for two groups of coils on the upper skeleton, this contact pin bottom and PCB wiring board weld one with wave-soldering, thereby formation circuit turn-on, this welding quality is solid and reliable, effectively improved production efficiency, structure after the improvement need not to adopt the higher annular knurl copper pin crimping connected mode of cost and directly uses riveted joint to connect, connect simple, convenient, effectively shorten process time, also avoided utilizing in the traditional structure copper pin to be connected the existing problem that can't effectively locate with the PCB wiring board.

Description of drawings

Fig. 1 is a contour structures synoptic diagram of the present utility model.(not connection PCB wiring board)

Fig. 2 is the partial sectional view after the PCB wiring board is gone up in the connection of cross coil movement.(shedding radome and two groups of coils)

Fig. 3 is the vertical view of Fig. 1.

Fig. 4 is the connection diagram of cross coil movement and PCB wiring board.

Embodiment

To elaborate again to the utility model embodiment by above-mentioned accompanying drawing below.

As Fig. 1～shown in Figure 4,1-lower skeleton, 2-radome, 3-upper skeleton, 4-hairspring, 5-needle shaft, 6-contact pin, 7-coil, 8-screw hole, 9-riveted joint, 10-magnet steel, 11-damping oil, 12-steel ball, 13-self-tapping screw, 14-PCB wiring board, 15-welded post.

A kind of simple type cross coil movement comprises the upper and lower skeleton that plastics are made.

Described upper skeleton 3 is to be cross upwardly extending by a underframe and four to be configured to, and is wound with two groups of coils 7 on the underframe, and each frame bottom all is provided with a riveted holes.Wherein pair of brackets height on described four support cross directions is identical, is connected with miscellaneous parts such as instrument on these two supports through screw.On the cross direction another is lower slightly to support height, and also there is difference in height between these two supports, a highly minimum top of the trellis is plugged with four contact pins 6 that are arranged in parallel, this contact pin is the nickel plating binding post, two groups of coils 7 that are wound on the upper skeleton connect four contact pins of conducting according to the relevant position respectively, the contact pin bottom passes PCB wiring board 14 after wave-soldering welds one to carry out circuit turn-on, described wave-soldering welding is meant the liquid solder with fusion, by with the effect of pump, form the solder wave of given shape at the solder bath liquid level, plug-in mounting the PCB wiring board of components and parts put with conveyer chain on, pass solder wave and realize the process that solder joint welds through a certain specific angle and certain immersion depth, therefore can enhance productivity greatly and connection reliability.Lower slightly the top of the trellis of minimum relatively support height be provided with welded post 15, in the shape of a spiral the hairspring 4 of type be sleeved on the needle shaft 5 of rotor, this hairspring the inner is welded on the needle shaft, the outer end is welded on the welded post 15, promptly can drive hairspring compression deformation when needle shaft 5 rotates.Having difference in height between lower two supports of described height is that contact pin 6 and welded post 15 are installed for convenience.

Described lower skeleton 1 also is to be made of a underframe and four legs that are cross downward extension, this lower skeleton is covered with the radome 2 of maskable external magnetic field, radome remanent magnetism causes the return difference angle less than 3 °, respectively extend upward the riveted joint 9 of four disjunctors at each leg top of lower skeleton, these four riveted joint correspondences are fitted in four riveted holes of upper skeleton 3, and carry out plastics riveted joint connection.Four leg bottoms of lower skeleton 1 are provided with the screw hole 8 for self-tapping screw 13 precessions, through four self-tapping screws lower skeleton and PCB wiring board 14 are connected and fixed.

Described upper and lower frame center is provided with rotor, this rotor comprises needle shaft 5, magnet steel 10, damping oil 11 and steel ball 12, magnet steel 10 is arranged on needle shaft 5 both sides, be wrapped with damping oil 11 at magnet steel, this damping oil sealing is reliable, even also can not ooze out in 24 hours in whole movement inversion, the needle shaft bottom is bearing on the steel ball 12 and rotates, the needle shaft top can be installed the pointer (not shown) and be indicated, and does not have card, stagnant phenomenon in the rotor rotation.

This simple type cross coil movement cost is low, process simple and convenient, the magnetic pole of magnet steel is distributed in the supporting design of the linearity that fan-shaped end face adds hairspring, increased the smoothness in pointer pointing accuracy and the operation process, its principle of work is, when the vehicle electric instrument, in the indicating mechanism such as instrument or measuring equipment along with the variation of monitored signal, the drive signal that software exports two groups of coils to also changes thereupon, cause changing by the electric current of two groups of coils 7, thereby the resultant magnetic field direction that makes two groups of hot-wire coils produce also changes thereupon, the magnetic pole of magnet steel 10 attracts mutually with the polarity of the magnetic field that hot-wire coil produces, promptly drive needle shaft 5 and pointer and rotate indication together, needle shaft rotates the hairspring compression deformation that forces with its welding, and needle shaft just, the reverse turn angle can not make hairspring produce the doubling-up interference greater than 270 °; Behind two groups of coil blackouts, the needle shaft rotating force that magnetic field produces disappears, and the pointer that this moment, the hairspring reinstatement will drive on the needle shaft is got back to the zero-bit position.

Claims

1, a kind of simple type cross coil movement, it comprises upper skeleton (3) and the lower skeleton (1) that connects one, be the cross two groups of coils (7) that are wound on the upper skeleton, cover on the outer radome (2) of lower skeleton and be connected PCB wiring board (14) on the lower skeleton (1), on, the lower skeleton center is provided with rotor, this rotor is by needle shaft (5), magnet steel (10), damping oil (11) and steel ball (12) are formed, but be set with the screw type hairspring (4) of recovery of elasticity on the needle shaft, the inner of this hairspring is fixed on the needle shaft (5), the outer end is fixed on the upper skeleton (3), it is characterized in that described on, lower skeleton (3,1) on connection is, rivet one with riveted joint (9) between the lower skeleton; Also be provided with four contact pins (6) that connect conducting for two groups of coils (7) respectively on the described upper skeleton (3), the bottom connection PCB wiring board (14) of these four contact pins.

2, simple type cross coil movement according to claim 1 is characterized in that described contact pin (6) is the nickel plating binding post.

3, simple type cross coil movement according to claim 1 and 2 is characterized in that described contact pin (6) bottom and being connected of PCB wiring board (14) are that contact pin (6) bottom and PCB wiring board (14) weld one through wave-soldering.

4, simple type cross coil movement according to claim 1 is characterized in that described riveted joint (9) is the upwardly extending conjoined structure of lower skeleton (1).