CN217008176U - Electronic handwriting pen, metal tube and plastic head composite structure - Google Patents

Abstract

The application discloses an electronic handwriting pen, a metal tube and plastic head composite structure, wherein the metal tube and plastic head composite structure comprises the metal tube and a plastic head, the metal tube is provided with an installation end, and the plastic head is arranged in the installation end for a preset length to be fixedly connected with the metal tube; the inner wall surface of the pipe wall of the mounting end is provided with a limiting structure protruding towards the inner circumferential direction of the pipe wall, and the plastic head is pressed and clamped by the limiting structure. Above-mentioned metal pipe and plastic head composite construction can improve the cohesion between metal pipe and the plastic head, avoids the plastic head to drop.

Description

Electronic handwriting pen, metal tube and plastic head composite structure

Technical Field

The application relates to the field of handwriting pens, in particular to an electronic handwriting pen, a metal tube and plastic head composite structure.

Background

The pen point of the existing electronic handwriting pen is a seamless metal tube, the diameter is 1.08mm, the wall thickness of the tube is less than 0.05mm, the glue injection depth at a metal port is required to be 4.6mm-6.0mm, and the plastic head is ensured not to fall off under the drawing force of 15N. According to a conventional injection molding method, a hole-dropping-preventing injection molding process or a nano injection molding process of a pipe is mainly adopted, but due to the limitation of the thickness of the pipe wall, the drawing force of the plastic head after injection molding in the prior art cannot meet the requirement, and the plastic head is easy to drop.

Therefore, how to prevent the plastic head of the electronic stylus pen from falling off relative to the metal tube is a technical problem to be solved by those skilled in the art.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a tubular metal resonator and first integrated configuration of plastic can improve the cohesion between tubular metal resonator and the plastic head, avoids the plastic head to drop. It is another object of the present application to provide an electronic stylus and a metal tube.

In order to achieve the above purpose, the present application provides a metal tube and plastic head composite structure, including a metal tube and a plastic head, wherein the metal tube is provided with an installation end, and the plastic head is arranged in the installation end for a preset length to be fixedly connected with the metal tube; the inner wall surface of the pipe wall of the mounting end is provided with a limiting structure protruding towards the inner circumferential direction of the pipe wall, and the plastic head is pressed and clamped by the limiting structure.

Optionally, the limiting structure includes a limiting groove which is recessed relative to the outer wall surface of the pipe wall of the mounting end, and the groove bottom of the limiting groove is inwardly convex relative to the inner wall surface of the pipe wall of the mounting end.

Optionally, the depth of the limiting groove is 0.03mm-0.05 mm.

Optionally, the limiting groove is provided with a plurality of groups.

Optionally, the widths of the plurality of sets of limiting grooves are different.

Optionally, the limiting structure includes a limiting rib provided on an inner wall surface of the pipe wall of the mounting end.

Optionally, the limiting structure is a limiting protrusion protruding from an inner wall surface of the pipe wall of the mounting end.

The application provides an electronic handwriting pen, including above-mentioned arbitrary metal tube and plastic head composite construction.

Optionally, the limiting structure includes a limiting groove which is recessed relative to the outer wall surface of the pipe wall of the mounting end, and the groove bottom of the limiting groove is inwardly convex relative to the inner wall surface of the pipe wall of the mounting end.

The application provides a metal pipe, the metal pipe is equipped with and supplies the plastic head to arrange the installation end wherein in, the pipe wall internal face of installation end is equipped with towards the protruding limit structure who establishes of its inner peripheral direction to support the plastic head to press the card to end.

The application provides a tubular metal resonator and plastic head composite construction hold the interior convex limit structure of relative pipe wall internal face at the installation of tubular metal resonator, utilize limit structure to lie in the local section of tubular metal resonator to the plastic head and compress tightly and block spacingly, improve the pullout force between tubular metal resonator and the plastic head, prevent effectively that the plastic head from droing from the tubular metal resonator. In a preferred embodiment, the limiting structure can adopt a limiting groove formed by rolling, the processing is convenient, and the production efficiency is improved.

Drawings

In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly introduced below, it is obvious that the drawings in the following description are only embodiments of the present application, and for those skilled in the art, other drawings can be obtained according to the provided drawings without creative efforts.

Fig. 1 is a structural diagram of a composite structure of a metal pipe and a plastic head according to an embodiment of the present disclosure;

fig. 2 is a longitudinal sectional view of fig. 1.

Wherein:

1-metal tube, 2-spacing groove, 3-plastic head.

Detailed Description

The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.

In order to enable those skilled in the art to better understand the scheme of the present application, the present application will be described in further detail with reference to the accompanying drawings and the detailed description.

The embodiment of the application provides a tubular metal resonator and plastic head composite construction, can show the increase and mould plastics the effort between the plastic head 3 that forms and the tubular metal resonator 1, avoid plastic head 3 to drop from tubular metal resonator 1. Specifically, as shown in fig. 1 and 2, one end of the metal pipe 1 is an installation end of the plastic head 3, and one end of the plastic head 3 is installed in the installation end of the metal pipe 1 by a preset length, so that the plastic head 3 and the metal pipe 1 are fixedly connected into a whole. In order to avoid between plastic head 3 and the tubular metal resonator 1 effort undersize to lead to plastic head 3 to drop easily, this application sets up limit structure at tubular metal resonator 1's installation end very much, make the relative pipe wall internal face of installation end of limit structure protruding the setting in, when the formation plastic head 3 of moulding plastics, the local section that plastic head 3 is located the installation end is compressed tightly and is blocked by limit structure, show the effort between increase tubular metal resonator 1 and the plastic head 3, effectively avoid plastic head 3 to drop from tubular metal resonator 1.

Because the metal tube 1 is a thin and long metal tube 1 with a thin wall, the length of the metal tube 1 reaches 13.47 +/-0.05 mm, the outer diameter of the metal tube 1.01 +/-0.02 mm, the inner diameter of the tube wall reaches 0.91 +/-0.02 mm, and the thickness of the tube wall is 0.05mm, in order to facilitate the processing and forming of the limiting structure, in an embodiment, the limiting structure specifically adopts an annular limiting groove 2, the outer wall surface of the tube wall of the mounting end corresponding to the limiting groove 2 is concave, the inner wall surface of the tube wall of the mounting end corresponding to the groove bottom of the limiting groove 2 is convex, after the plastic head 3 is formed by injection molding, the part of the limiting groove 2, which is convex to the inner wall surface of the tube wall, compresses and clamps the local section of the plastic head 3, which is located on the metal tube 1, so that the drawing force between the plastic head 3 and the metal tube 1 exceeds 20N. The depth of the limiting groove 2 is usually controlled to be 0.03mm-0.05mm, and the limiting groove is formed by rolling through a rolling machine.

In an embodiment, the limiting grooves 2 are arranged in multiple groups, specifically two groups as shown in fig. 1, the two groups of limiting grooves 2 are arranged at a set distance, and the distance from the limiting grooves 2 to the end of the metal pipe 1 is smaller than the length of the plastic head 3 formed by injection molding in the metal pipe 1, so that the multiple groups of limiting grooves 2 form multiple limiting stops for the local section of the plastic head 3 in the metal pipe 1, and the anti-falling drawing force can be improved in multiple times. The plurality of sets of limiting grooves 2 can be set to have equal width or different width, and the limiting grooves 2 can also be chamfer grooves with chamfers, which is not limited in detail here.

Based on understanding the above-mentioned embodiment, the tubular metal resonator and plastic head composite construction that this application provided, tubular metal resonator 1's limit structure can also set up to the protruding spacing arch in the relative pipe wall internal face, spacing protruding accessible forms the pipe wall punching press, tubular metal resonator 1 warp when avoiding punching press tubular metal resonator 1, can follow tubular metal resonator 1's both ends in advance to insert the columnar supporter in tubular metal resonator 1 when punching press is spacing protruding, the columnar supporter that inserts from both ends sets up in order to set for the clearance, the width that should set for the clearance slightly is greater than spacing bellied diameter, spacing protruding even punching press multiunit in circumference that can follow the pipe wall. In addition, the limiting protrusion can also adopt a limiting rib, and the limiting rib can be a metal ring welded or glued on the inner wall of the metal pipe 1, which is not described in detail herein.

The embodiment of the application provides an electronic stylus pen, including the tubular metal resonator 1 and the 3 composite construction of plastic head that above-mentioned embodiment provided, the part that plastic head 3 stretches out outside tubular metal resonator 1 can refer to current electronic stylus pen and set up in a flexible way, only need change the mould when moulding plastics, can process the electronic stylus pen that has different specification plastic heads 3, and prior art is referred to other parts of electronic stylus pen.

The embodiment of the application provides a tubular metal resonator 1, tubular metal resonator 1 is equipped with the installation end, and plastic head 3 can be installed and predetermine length in tubular metal resonator 1's installation end through moulding plastics, and in order to avoid plastic head 3 to drop, tubular metal resonator 1's installation end pipe wall internal face is equipped with towards its protruding limit structure who establishes of inner peripheral direction, and this limit structure adopts the structure such as spacing groove 2 that above-mentioned embodiment recorded, and this here is no longer repeated.

The processing method of the metal pipe and plastic head composite structure comprises the following steps:

processing to generate a metal tube 1; specifically, SUS316L metal strip can be selected to make the outer diameter of the welded metal tube 1 reach 1.01mm and the wall thickness reach 0.05mm by the traditional welding, cold drawing, tempering and empty drawing reducing technology.

Cutting the metal pipe 1 to a fixed length; then, the metal tube 1 is cut into a set length according to the size requirement of the electronic stylus pen to be produced, and the length requirement of the product is met. The cutting can be carried out by adopting a laser cutting machine, the specification of the metal pipe 1 is comprehensively detected after the cutting, and the metal pipe 1 with the size not reaching the standard is removed. The comprehensive detection mode is to adopt a CCD camera for detection.

Processing a limiting structure at one end of the metal pipe 1, so that the limiting structure is inwards convex relative to the inner wall surface of the pipe wall of the metal pipe 1; here, taking the limiting structure adopting the limiting groove 2 as an example for explanation, vertically placing the metal tube 1 with the full-inspection size meeting the requirement into the chuck of the rolling machine, rolling the metal tube 1 to form the limiting groove 2, when two or even more limiting grooves 2 are adopted, repeatedly rolling the mounting end of the metal tube 1, and controlling the depth of the limiting groove 2 to be 0.03-0.05 mm.

And (3) placing the end of the metal pipe 1 provided with the limiting structure into an injection mold and performing injection molding to form a plastic head 3. One end with a limiting groove 2 is inserted into an injection mold, a plastic head 3 is formed by injection molding in the injection mold, the plastic head 3 is matched with an inner convex part of the limiting groove 2, acting force between the plastic head 3 and the inner wall of the metal pipe 1 is improved, and the plastic head 3 is effectively prevented from falling off.

It is noted that, in this specification, relational terms such as first and second, and the like are used solely to distinguish one entity from another entity without necessarily requiring or implying any actual such relationship or order between such entities.

The electronic stylus, the metal tube and the composite structure of the metal tube and the plastic head provided by the application are introduced in detail above. The principles and embodiments of the present application are described herein using specific examples, which are only used to help understand the method and its core idea of the present application. It should be noted that, for those skilled in the art, it is possible to make several improvements and modifications to the present application without departing from the principle of the present application, and such improvements and modifications also fall within the scope of the claims of the present application.

Claims (10)

1. A metal tube and plastic head composite structure is characterized by comprising a metal tube and a plastic head, wherein the metal tube is provided with an installation end, and the plastic head is arranged in the installation end for a preset length to be fixedly connected with the metal tube; the inner wall surface of the pipe wall of the mounting end is provided with a limiting structure protruding towards the inner circumferential direction of the pipe wall, and the plastic head is pressed and clamped by the limiting structure.

2. The metal pipe and plastic head composite structure as claimed in claim 1, wherein the limiting structure comprises a limiting groove recessed relative to the outer wall surface of the pipe wall of the mounting end, and the groove bottom of the limiting groove is recessed relative to the inner wall surface of the pipe wall of the mounting end.

3. The metal tube and plastic head composite structure as claimed in claim 2, wherein the depth of the limiting groove is 0.03mm to 0.05 mm.

4. The metal tube and plastic head composite structure as claimed in claim 2, wherein the plurality of sets of limiting grooves are provided.

5. The metal tube and plastic head composite structure as claimed in claim 4, wherein the plurality of sets of the limiting grooves have different widths.

6. The metal tube and plastic head composite structure as claimed in claim 1, wherein the limiting structure comprises a limiting rib provided on an inner wall surface of the tube wall of the mounting end.

7. The metal pipe and plastic head composite structure as claimed in claim 1, wherein the limiting structure is a limiting protrusion protruding from an inner wall surface of the pipe wall of the mounting end.

8. An electronic stylus comprising the metal tube and plastic tip composite structure of any one of claims 1-7.

9. A metal pipe is characterized in that the metal pipe is provided with an installation end for placing a plastic head in the metal pipe, and the inner wall surface of the pipe wall of the installation end is provided with a limiting structure protruding towards the inner circumferential direction of the installation end so as to press and clamp the plastic head.

10. The metal tube according to claim 9, wherein the limiting structure comprises a limiting groove which is concavely arranged relative to the outer wall surface of the tube wall of the mounting end, and the groove bottom of the limiting groove is inwards convex relative to the inner wall surface of the tube wall of the mounting end.

Images