CN217824466U - Lead screw injection molding integrated rotor, lens driving stepping motor and camera device - Google Patents

Abstract

The utility model relates to a lead screw is moulded plastics integrative rotor, lens drive step motor and camera device. It has solved the defect such as prior art design is unreasonable. This integrative rotor of lead screw mould plastics includes drum magnetism ring body to and one end stretches into the threaded power take off pole of drum magnetism ring body, it will to have through injection moulding in the drum magnetism ring body stretches into with one end the cylinder of moulding plastics that the threaded power take off pole of drum magnetism ring body is fixed together, and the both ends of threaded power take off pole extend respectively to outside the axial both ends of the cylinder of moulding plastics. This application advantage: the cylinder of moulding plastics is through injection moulding, and in injection moulding, the cylinder of moulding plastics can be directly together threaded power take off pole and drum magnetic ring body snap-on, and a great deal of mechanical connection mode has not only been left out to this kind of mode, but also can ensure the mechanical connection intensity of threaded power take off pole and drum magnetic ring body to prevent droing that the bonding leads to.

Description

Lead screw injection molding integrated rotor, lens driving stepping motor and camera device

Technical Field

The utility model belongs to the technical field of make a video recording, especially, relate to a lead screw is moulded plastics integrative rotor, lens drive step motor and camera device.

Background

Stepper motors have been used for optical focusing or anti-shake.

The structure of the stepping motor comprises a rotor, a stator, a rotor shaft and a lead screw connected to the output end of the rotor shaft, and the existing rotor and the rotor shaft are connected by adopting a shaft sleeve.

Although the above scheme can satisfy the use requirement, its structure of above scheme is comparatively complicated, for example, need connect the rotor shaft in the rotor with the help of the axle sleeve, and the lead screw needs connect in the output of rotor shaft with the help of the connected mode of screw thread, and above structure leads to production efficiency to reduce to and axle sleeve and rotor shaft adopt the mode of bonding fixed, and joint strength between them is not enough, has the hidden danger that drops.

SUMMERY OF THE UTILITY MODEL

The utility model aims at the above-mentioned problem, provide a lead screw that can solve above-mentioned technical problem and mould plastics integrative rotor, lens drive step motor and camera device.

In order to achieve the above purpose, the utility model adopts the following technical proposal:

this integrative rotor of lead screw mould plastics includes drum magnetism ring body to and one end stretches into the threaded power take off pole of drum magnetism ring body, it will to have through injection moulding in the drum magnetism ring body stretches into with one end the cylinder of moulding plastics that the threaded power take off pole of drum magnetism ring body is fixed together, and the both ends of threaded power take off pole extend respectively to outside the axial both ends of the cylinder of moulding plastics.

In the rotor with the screw rod integrated with the injection molding, the section of the surface of the power output rod with the threads, which is fixedly embedded in the injection molding cylinder body, is provided with the concave-convex structure, and the concave-convex structure is embedded in the inner wall of the injection molding cylinder body.

In the rotor with the integrally injection-molded screw rod, the concave-convex structure is any one or combination of a plurality of knurling structures, groove structures, outer convex structures, thread structures and spline structures.

In the rotor with the integrally injection-molded lead screw, two axial end faces of the injection-molded cylinder body respectively protrude out of two axial end faces of the cylinder magnetic ring body.

As another solution, in the rotor with the integrally injection-molded lead screw, two axial end surfaces of the injection-molded cylinder are flush with two axial end surfaces of the cylindrical magnetic ring body, respectively.

In the rotor with the integrated screw rod, the two ends of the inner wall of the cylindrical magnetic ring body are respectively provided with an inner step.

In the above rotor with the screw rod integrally molded, the power output rod with the screw thread comprises a long thread section and a short polished rod section, the middle part of the short polished rod section is fixedly embedded in the injection molding cylinder body, and two end parts of the short polished rod section beyond two axial ends of the injection molding cylinder body are bearing installation parts.

In the rotor with the integrally injection-molded lead screw, the concave-convex structure is arranged on the surface of the middle part of the short section of the polished rod.

The application also provides a lens driving stepping motor, the lens driving stepping motor comprises the lead screw and an integrated rotor.

The application also provides a camera device, which comprises the lens driving stepping motor.

Compared with the prior art, the application has the advantages that:

the cylinder of moulding plastics is through injection moulding, and in injection moulding, the cylinder of moulding plastics can be directly together threaded power take off pole and drum magnetic ring body snap-on, and a great deal of mechanical connection mode has not only been left out to this kind of mode, but also can ensure the mechanical connection intensity of threaded power take off pole and drum magnetic ring body to prevent droing that the bonding leads to.

The injection molding can improve the production efficiency, has compact structure, safety and reliability, reduces mechanical noise, reduces abrasion, prolongs the service life of a product, is easy to assemble the whole machine in the process, and simultaneously reduces the processing cost and the assembling cost.

POM4520 is selected as the material of the injection molding cylinder, the material has good fluidity and medium viscosity, and after injection molding, the strength is high and no falling risk exists.

Drawings

Fig. 1 is a schematic view of the screw rod injection molding integrated rotor three-dimensional structure provided by the utility model.

Fig. 2 is a schematic view of the screw injection integrated rotor structure provided by the present invention.

Fig. 3 isbase:Sub>A schematic sectional view taken along linebase:Sub>A-base:Sub>A in fig. 2.

Fig. 4 is an enlarged schematic view of B in fig. 3.

Fig. 5 is a schematic structural view of the power take-off rod with threads provided by the present invention.

In the figure, a cylindrical magnetic ring body 1, an inner step 10, a threaded power output rod 2, a concave-convex structure 20, a threaded long section 21, a polished rod short section 22, a bearing mounting part 220 and an injection molding cylinder body 3.

Detailed Description

The following are specific embodiments of the present invention and the accompanying drawings are used to further describe the technical solution of the present invention, but the present invention is not limited to these embodiments.

Example one

As shown in fig. 1, the screw injection-molded rotor includes a cylindrical magnetic ring body 1 and a threaded power output rod 2 with one end extending into the cylindrical magnetic ring body 1.

The threaded power output rod 2 of the embodiment integrates two functions of a motor output shaft and a transmission screw rod connected to the output shaft.

The length of the power output rod 2 with the screw thread is longer than the axial length of the cylindrical magnetic ring body 1.

As shown in fig. 1 to 3, an injection molding cylinder 3 is formed in the cylindrical magnetic ring body 1 by injection molding, the cylindrical magnetic ring body 1 and a threaded power output rod 2 with one end extending into the cylindrical magnetic ring body 1 are fixed together, and both ends of the threaded power output rod 2 are respectively extended beyond both axial ends of the injection molding cylinder 3.

The cylinder 3 of moulding plastics is through injection moulding, and in injection moulding, the cylinder 3 of moulding plastics can be directly be in the same place threaded power take off pole 2 and the 1 snap-on of drum magnetic ring body, and this kind of mode has not only left out a great deal of mechanical connection mode, but also can ensure threaded power take off pole 2 and the mechanical joint strength of drum magnetic ring body 1 to prevent droing that the bonding leads to.

Secondly, injection moulding can improve production efficiency for compact structure, safe and reliable reduces mechanical noise, reduces wearing and tearing, improves product life, and easy follow-up complete machine equipment reduces processing cost and equipment cost simultaneously on the technology.

POM4520 is selected as the material of the injection molding cylinder 3, the material has good fluidity and medium viscosity, and after injection molding, the strength is high and no falling risk exists.

Preferably, as shown in fig. 4-5, the threaded power take-off rod 2 is embedded in the injection-molded cylinder 3, and a section of the surface of the threaded power take-off rod is provided with the concave-convex structure 20, and the concave-convex structure 20 is embedded in the inner wall of the injection-molded cylinder 3. The concave-convex structure 20 can further improve the mechanical connection strength between the two and avoid the falling-off phenomenon.

Specifically, the concave-convex structure 20 of the present embodiment is any one or combination of a knurled structure, a groove structure, an outer convex ring structure, an outer convex point structure, a threaded structure, and a spline structure.

The knurling structure is diamond knurling or knurling with other patterns.

The groove structure is at least one groove provided along the length or diameter of the threaded power take-off rod 2, but it is preferable that the number of grooves is plural.

The outer convex ring structure is at least one outer convex ring arranged in the length direction or the diameter direction of the threaded power output rod 2.

The outer convex point structure is a plurality of outer convex points arranged in the length direction or the diameter direction of the power output rod 2 with the threads, and the outer convex points can surround the diameter direction to form a circle or can be in a linear mode of discrete arrangement.

The thread structure can be both positive and negative threads.

The spline structure is spline teeth directly rolled on the outer surface of the threaded power output rod 2.

Preferably, both axial end surfaces of the injection molded cylindrical body 3 of the present embodiment protrude from both axial end surfaces of the cylindrical magnetic ring body 1, respectively. The protruding structure facilitates the overall demolding.

Two ends of the inner wall of the cylindrical magnetic ring body 1 are respectively provided with an inner step 10, and the inner steps 10 are process steps.

Specifically, the threaded power take-off rod 2 of the present embodiment includes a threaded long section 21 and a polished rod short section 22, the middle part of the polished rod short section 22 is embedded and fixed in the injection cylinder 3, and the concave-convex structure 20 is provided on the middle surface of the polished rod short section 22. The two end parts of the polish rod short section 22 beyond the two axial ends of the injection cylinder 3 are bearing mounting parts 220.

The production process of this example is as follows:

s1, fixing a cylindrical magnetic ring body 1 in an injection mold in advance;

s2, inserting the thread-free section of the power output rod 2 with the thread into the axial center of the cylindrical magnetic ring body 1, and respectively extending two ends of the power output rod 2 with the thread out of two ends of the cylindrical magnetic ring body 1;

and S3, injecting the injection material between the cylindrical magnetic ring body 1 and the non-threaded section of the threaded power output rod 2, and cooling and forming to obtain the screw rod injection molding integrated rotor.

Further, a plurality of annular grooves 30 are provided on the outer wall of the injection cylinder 3. The annular groove 30 is a V-shaped groove.

Example two

The structure and the working principle of the embodiment are basically the same as those of the first embodiment, and the different structures are as follows: the two axial end surfaces of the injection molding cylinder body 3 are respectively flush with the two axial end surfaces of the cylinder magnetic ring body 1.

EXAMPLE III

The present embodiment provides a lens driving stepping motor, which includes a rotor formed by injection molding of a lead screw according to the first embodiment or the second embodiment.

The rotor with the screw rod integrally molded is positioned in the stator.

Example four

This embodiment provides an image pickup apparatus including the lens driving stepping motor of the third embodiment. Such as a mobile phone or the like.

The specific embodiments described herein are merely illustrative of the spirit of the invention. Various modifications, additions and substitutions for the specific embodiments described herein may be made by those skilled in the art without departing from the spirit of the invention or exceeding the scope of the invention as defined in the accompanying claims.

Claims (10)

1. Integrative rotor is moulded plastics to lead screw, including drum magnetism ring body (1) to and one end stretches into threaded power take off pole (2) of drum magnetism ring body (1), its characterized in that, have in drum magnetism ring body (1) through injection moulding with drum magnetism ring body (1) and one end stretch into the cylinder (3) of moulding plastics that threaded power take off pole (2) of drum magnetism ring body (1) are fixed together, and the both ends of threaded power take off pole (2) extend respectively to outside the axial both ends of the cylinder (3) of moulding plastics.

2. The screw injection molding integrated rotor according to claim 1, wherein a concave-convex structure (20) is arranged on a section of surface of the threaded power output rod (2) embedded in the injection molding cylinder (3), and the concave-convex structure (20) is embedded in the inner wall of the injection molding cylinder (3).

3. The screw injection molded integrated rotor according to claim 2, wherein the concave-convex structure (20) is any one or more combination of a knurled structure, a groove structure, an outer convex ring structure, an outer convex point structure, a threaded structure and a spline structure.

4. The screw rod injection-molded integrated rotor as claimed in claim 1, wherein two axial end faces of the injection-molded cylinder body (3) respectively protrude from two axial end faces of the cylindrical magnetic ring body (1).

5. The screw rod injection-molded integrated rotor according to claim 1, wherein two axial end faces of the injection-molded cylinder (3) are flush with two axial end faces of the cylindrical magnetic ring body (1), respectively.

6. The screw rod injection molding integrated rotor according to claim 1, wherein inner steps (10) are respectively arranged at two ends of the inner wall of the cylindrical magnetic ring body (1).

7. The screw injection-molded integrated rotor according to claim 2, wherein the threaded power take-off rod (2) comprises a threaded long section (21) and a polished rod short section (22), the polished rod short section (22) is embedded and fixed in the injection-molded cylinder (3) at the middle part, and the concave-convex structure (20) is arranged on the surface of the polished rod short section (22) at the middle part.

8. The screw injection-molded integrated rotor according to claim 7, wherein the two ends of the polish rod short section (22) beyond the two ends of the injection-molded cylinder (3) in the axial direction are bearing mounting parts (220).

9. Lens driving stepper motor, characterized in that it comprises a lead screw injection molded integral rotor according to any of claims 1-8.

10. An image pickup apparatus, characterized in that it comprises a lens driving stepping motor according to claim 9.

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