KR20220058719A - Injection mold of hinge gear for folder type portable computer - Google Patents

Abstract

The present invention relates to an injection mold of a hinge gear for a folder-type portable computer, in which a gate hole (90) is directed toward a wide pitch space gap (75) for forming a wide pitch line (65) of a hinge gear (60) used only for identification of a worker, and the wide pitch space gap (75) is provided at a tooth tip circle, a pitch circle, or a tooth root circle of an under mold (70), so that key fixing according to discrimination of upward and downward directions is accurately performed by the hinge gear (60) while rapidly checking wide pitch lines (65) of hinge gears (60) when the hinge gears (60) are assembled with pinion gears (50) according to mutually different assembly angles of a base shaft (20) and a display shaft (40), which are components of a hinge module (H) of a notebook computer.

Description

Hinge gear injection mold for clamshell portable computer {INJECTION MOLD OF HINGE GEAR FOR FOLDER TYPE PORTABLE COMPUTER}

The present invention relates to a hinge gear injection mold for a clamshell portable computer, and more particularly, to a hinge gear such that a gate hole faces in a wide pitch space gap for forming a wide pitch line of a hinge gear used only for identification of an operator. It relates to a hinge gear injection mold for a foldable portable computer that can significantly reduce the defect rate during injection molding of gears.

In general, a clamshell portable computer refers to a foldable and unfoldable notebook computer or a clamshell portable terminal.

1 is a perspective view showing the structure of a notebook computer according to the prior art document.

The notebook computer 100 according to the prior art document has a base unit 110 including upper and lower cases 111 and 112 provided with input means such as a keyboard 117 and a touch pad 118 as shown in FIG. 1 . And, the display unit 120 including the front cover 123 and the back cover 122 supporting the liquid crystal display device 121 is foldably coupled to the base unit 110 through the cam hinge 200 .

One side of the cam hinge 200 is fixed to the display unit 120 , and the shaft cam 220 is rotatably inserted into the hinge housing 230 fixed to the base unit 110 at the other side to serve as a bearing. That is, the cam hinge 200 is provided with a rotating piece 210 fixed to the display unit 110 by a separate fastening means (fastening bolt, etc.) at one end, and is formed integrally with the rotating piece 210 . A shaft cam 220 having a cam shape at the other end is provided, and a fixing piece 240 of the hinge housing 230 having an inner diameter matching the cam shape of the shaft cam 220 is fixed to the base unit 110 . do.

The cam hinge 200 is provided at both ends of one side of the display unit 120 and the base unit 110, and the cam hinge 200 is inserted into the hinge housing 230 having an inner diameter so that the shaft cam 220 is rotatably inserted. and the rotating piece 210 of the shaft cam 220 is fixed to the display unit 120 , and the fixing piece 240 provided in the hinge housing 230 is fixed to the base unit 110 .

The applicant of the present application intends to develop a hinge gear related to the cam hinge 200 of the prior art document and propose it as the present invention.

Republic of Korea Patent Publication No. 0706501

It is an object of the present invention to provide an injection mold for a hinge gear for a folding type portable computer that enables assembly of the hinge gear while accurately identifying the direction when the key is fixed to the base shaft and the display shaft.

It is an object of the present invention to make a folding type portable so that the defect rate during injection molding of the hinge gear can be significantly reduced by directing the gate hole to the wide pitch space gap for forming the wide pitch line of the hinge gear used only for identification of the operator. It is to provide a hinge gear injection mold for a computer.

An object of the present invention is to set the wide pitch spatial gap to the tip circle, pitch circle or root circle of the under mold while directing the gate hole to the wide pitch space gap for forming the wide pitch line of the hinge gear used for identification of the operator. When assembling the hinge gear together with the pinion gears according to the different assembly angles of the base axis and the display axis, which are the components of the hinge module of the notebook computer, quickly check the wide pitch line of the hinge gears and the key according to the vertical direction distinction It is to provide a hinge gear injection mold for a folding type portable computer that can be accurately fixed.

According to the present invention for achieving the above object, there is provided a hinge gear injection mold for a foldable portable computer,

Having an undermold having an under-core and having teeth protrusions and grooves alternately arranged at an even pitch jagged inwardly of an outer wall of an under-circular groove spaced apart from the under-core, and an upper core conforming to the under-core. and an upper mold that is combined with the under mold while providing an upper circular groove spaced apart from the upper core;

The undermold has a wide pitch space gap provided by relatively spacing the pitch between any one of the two projections and the other adjacent teeth,

The basic feature of the technical configuration is that the undermold or the uppermold has a gate hole facing the wide pitch space gap.

The present invention has the effect of enabling assembly while accurately identifying the direction of the hinge gear when the key is fixed to the base shaft and the display shaft.

According to the present invention, the shaft hole of the hinge gear is provided by the matching of the under core and the upper core, the cylindrical body of the hinge gear is provided by the under circular groove, and the teeth and tooth grooves of the hinge gear are provided by the teeth and the teeth. At this time, the hinge gear has the effect of increasing the accuracy while minimizing the defect rate while ensuring the speed in mass production by injecting the stainless steel melt into the under-mold and the upper mold so that it can be manufactured by injection molding.

The present invention has the effect of remarkably reducing the defect rate during injection molding of the hinge gear by directing the gate hole to the wide pitch space gap for forming the wide pitch line of the hinge gear used only for identification of the operator.

The present invention provides a wide pitch space gap at the tip circle, pitch circle or root circle of the undermold while directing the gate hole to the wide pitch space gap for forming the wide pitch line of the hinge gear used for worker identification. When the hinge gear is assembled together with the pinion gears according to the different assembly angles of the base axis and the display axis, which are the components of the hinge module of the notebook computer, the wide pitch line of the hinge gears is quickly checked and the key is fixed according to the vertical direction. It has the effect of enabling it to be accurately realized.

1 is a perspective view showing the structure of a notebook computer according to the prior art document.
2A is a perspective view showing a folded state of a notebook computer, which is one of the foldable portable computers according to the present invention;
Fig. 2B is a left side view showing a folded state of a notebook computer, which is one of the foldable portable computers according to the present invention;
2C is a perspective view of the hinge module in a folded state of a notebook computer, which is one of the foldable portable computers according to the present invention, as viewed from the rear.
2D is a perspective view of the hinge module in a folded state of a notebook computer, which is one of the foldable portable computers according to the present invention, as viewed from the left side;
Fig. 2E is a right side view showing a hinge module in a folded state of a notebook computer, which is one of the foldable portable computers according to the present invention;
Fig. 3A is a perspective view showing a state in which a notebook computer, which is one of the foldable portable computers according to the present invention, is unfolded at a right angle;
3B is a left side view showing the hinge module in a state in which the notebook computer, which is one of the foldable portable computers according to the present invention, is unfolded at right angles;
3C is a perspective view of the hinge module in a state in which the notebook computer, which is one of the foldable portable computers according to the present invention, is unfolded at a right angle, as viewed from the rear.
4A is a perspective view showing a horizontally unfolded state of a notebook computer, which is one of the foldable portable computers according to the present invention;
4B is an enlarged perspective view showing the hinge module in a state in which the notebook computer, which is one of the foldable portable computers, is horizontally unfolded according to the present invention;
4C is a perspective view of the hinge module in a state in which the notebook computer, which is one of the foldable portable computers according to the present invention, is horizontally unfolded, as viewed from the left side;
4D is a perspective view of the hinge module in a horizontally unfolded state, which is one of the foldable portable computers according to the present invention, as viewed from the rear.
5A is a front view of the main part of a hinge module in a folded state of a notebook computer, which is one of the foldable portable computers according to the present invention;
5B is a side view of a main part of a hinge module in a state in which a notebook computer, which is one of the foldable portable computers, is horizontally unfolded according to the present invention;
6A and 6B are perspective views illustrating a hinge gear for a folding portable computer according to the present invention from different angles;
7 is a plan view showing definitions of terms for describing a hinge gear for a folding type portable computer according to the present invention;
8A is a plan view showing a hinge gear for a foldable portable computer according to an embodiment of the present invention;
8B is a plan view showing a hinge gear for a foldable portable computer according to another embodiment of the present invention;
8C is a plan view showing a hinge gear for a foldable portable computer according to another embodiment of the present invention;
9A is a perspective perspective view showing a hinge gear injection mold for a foldable portable computer according to the present invention;
9B is a longitudinal cross-sectional view showing a hinge gear injection mold for a folding type portable computer according to the present invention;
9C is a plan cross-sectional view showing the hinge gear injection mold for a folding type portable computer according to the present invention;
10 is a plan view of an undermold showing definitions of terms for describing a hinge gear injection mold for a folding type portable computer according to the present invention;
11A is a plan view illustrating an under mold of a hinge gear injection mold for a folding type portable computer according to an embodiment of the present invention;
11B is a plan view illustrating an under mold of a hinge gear injection mold for a folding type portable computer according to another embodiment of the present invention;
11C is a plan view illustrating an under mold of a hinge gear injection mold for a folding type portable computer according to another embodiment of the present invention;

A preferred embodiment of the hinge gear injection mold for a folding type portable computer according to the present invention will be described with reference to the drawings. You will be able to better understand the benefits.

Fig. 2a is a perspective view showing a folded state of a notebook computer which is one of the foldable portable computers according to the present invention, and Fig. 2b is a left side view showing the folded state of a notebook computer which is one of the foldable portable computers according to the present invention. It shows the folded state of the base board (B) and the display board (D) centered on the hinge modules (H) provided on both sides before using.

Fig. 2c is a perspective view of the hinge module (H) in a folded state of a notebook computer, which is one of the foldable portable computers according to the present invention, as viewed from the rear side, and Fig. 2D is the folded state of the laptop computer, which is one of the foldable portable computers according to the present invention. It is a perspective view of the hinge module (H) in a state of being viewed from the left side, and FIG. 2E is a right side view showing the hinge module (H) in a folded state of a notebook computer, which is one of the foldable portable computers according to the present invention.

The hinge module H of the notebook computer, which is one of the portable computers, includes a base shaft 20 fixed to the base bracket 10 coupled to the base board B as shown in FIGS. 2A to 2E , and a display board ( The display shaft 40 fixed to the display bracket 30 coupled to D), the base shaft 20 and the display shaft 40 are respectively fitted and assembled together with the pinion gears 50 to the base board (B) and It consists of a hinge gear 60 that enables the display board (D) to be folded, erected at a right angle, and horizontally unfolded.

3A is a perspective view showing a notebook computer, one of the foldable portable computers according to the present invention, in a state in which it is opened at right angles, and FIG. 3B is a hinge module ( A left side view showing H), FIG. 3C is a perspective view of the hinge module (H) in a state in which the notebook computer, which is one of the foldable portable computers according to the present invention, is unfolded at right angles, as viewed from the rear, provided on both sides for using the notebook computer. It shows a state in which the display board (D) is erected at a right angle from the base board (B) with the hinge module (H) as the center.

4A is a perspective view showing a horizontally unfolded state of a notebook computer, which is one of the foldable portable computers according to the present invention, and FIG. 4B is a hinge module ( H) is an enlarged perspective view, FIG. 4C is a perspective view of the hinge module H in a horizontally unfolded state of a notebook computer, which is one of the foldable portable computers according to the present invention, viewed from the left side, and FIG. 4D is a foldable type according to the present invention A perspective view of the hinge module (H) in a state in which the notebook computer, which is one of the portable computers, is horizontally unfolded, as viewed from the rear, from the base board (B) to the display board with the hinge module (H) provided on both sides for using the notebook computer as the center. (D) is shown horizontally.

As shown in Figures 2a to 4d, the base bracket (B) coupled to the base board (B) when implementing the folding, right-angled erection and horizontal unfolding of the base board (B) and the display board (D) depending on whether a notebook computer is used ( 10) and the display bracket 30 coupled to the display board D are also interlocked by folding, erecting at right angles, and horizontally unfolding, and the base shaft 20 and the display shaft 40 are rotated together in accordance with this and at the same time the pinion gear 50 ) and the hinge gear 60 are also rotated while being engaged with each other.

At this time, the base board (B) and the display board (D) can be rotated counterclockwise after clockwise rotation when implementing folding, right-angled erection and horizontal unfolding, but infinite clockwise rotation or infinite counter-clockwise rotation is impossible. [The reason is that the base board (B) and the display board (D) cannot be moved beyond the folded state].

In addition, when the base bracket 10 fixed to the base board B and the display bracket 30 fixed to the display board D are rotated in the reverse direction after the forward rotation, the hinge gear 60 also rotates in the forward direction and then in the reverse direction. , The assembly angle of the base shaft 20 and the display shaft 40 on the hinge module (H) according to the rotation angle when the base board (B) and the display board (D) are folded, erected at right angles and horizontally unfolded. It can also be assembled differently, in this case, the hinge gear 60 is also assembled by fixing the keys together according to the assembling angle of the base shaft 20 and the display shaft 40 as described later in conjunction with FIGS. 5A and 5B below. should be able to be

5A is a front view of the hinge module (H) in a folded state, which is one of the foldable portable computers according to the present invention. It is a main part side view showing the hinge module (H) in an unfolded state.

As shown in FIGS. 2c, 2d, and 5a, when you want to use a notebook computer, you must fold, stand, and unfold the display board (D) from the base board (B), so unlike the straight base shaft (20) The display shaft 40 has a section in which it is bent, and for this reason, the assembly angle between the base shaft 20 and the display shaft 40 is also inevitably different.

Accordingly, the hinge gears 60 assembled together with the pinion gears 50 according to different assembly angles of the base shaft 20 and the display shaft 40, which are components of the hinge module H of the notebook computer, are also shown in FIG. 5b. As shown in, for example, the key may be fixed to the display shaft 40 with a slope of 9.50° [different inclination of the shaft (axis) according to the gear ratio], and in this case, the assembler is the hinge gear 60 according to the angle difference. It is possible to ensure smooth forward and reverse rotation of the hinge module (H) with respect to the opening and closing of the notebook computer only when the vertical direction is precisely aligned.

However, as shown in FIG. 5B , the hinge gear 60 having a diameter of 4.5 mm, or even a diameter of 3.5 mm, which is progressively smaller, is adjusted vertically according to the inclination of the base shaft 20 or the display shaft 40, respectively. It should be able to align in the correct direction, but it is frequently the case that the key is fixed in the up and down reverse direction due to an error during assembly work at the actual site, which is causing a problem that leads to a malfunction of the notebook computer.

In the present invention, in order to solve this problem, when the hinge gear 60 is keyed to the base shaft 20 and the display shaft 40, the direction thereof can be accurately identified when assembling the hinge gear for a clamshell portable computer, and furthermore, a clamshell type. A hinge gear injection mold for portable computers was proposed.

6A and 6B are perspective views illustrating the hinge gear for a folding portable computer according to the present invention from different angles.

As shown in FIGS. 2 to 6B, the hinge gear for a folding type portable computer according to the present invention is a cylindrical body 61 having a shaft hole 62. The teeth 63 are alternately arranged at an even pitch jagged outward. and toothed grooves 64 .

The shaft hole 62 is provided with a keyway (not shown) for key fixing to the base shaft 20 and the display shaft 40, or the base shaft 20 and the display shaft ( 40) and can be pierced in a non-circular shape conforming to

Specifically, as shown in FIGS. 6A and 6B, the hinge gear for a folding type portable computer according to the present invention is between the teeth 63 of any one of the teeth 63 and the other neighboring teeth 63, as shown in FIGS. 6A and 6B. It is characterized in that it includes a wide pitch line 65 provided to be relatively spaced apart pitch.

Unlike the teeth 63 and the tooth grooves 64 alternately arranged with an even pitch jagged outward of the cylindrical body 61, any one of the teeth 63 and the other neighboring teeth The pitch between the teeth 63 (specifically, the pitch corresponding to the key direction of the shaft hole 62 that is keyed so as to match the angle of the base axis 20 and the display axis 40 accurately) is relatively spaced apart to obtain a wide pitch By providing a line 65, the hinge gears 60 together with the pinion gears 50 are aligned to the different assembly angles of the base shaft 20 and the display shaft 40, which are the components of the hinge module H of the notebook computer. When assembling, the wide pitch line 65 of the hinge gears 60 is checked in advance so that the vertical direction can be grasped, so that the smooth forward and reverse rotation for opening and closing of the notebook computer can be realized through assembly without defects.

7 is a plan view illustrating definitions of terms for describing the hinge gear for a clamshell portable computer according to the present invention. The garden along the center between the back and the tooth end is called a pitch circle, and the garden along the tooth end of the hinge gear 60 is called the tooth tip circle.

8A is a plan view showing a hinge gear for a folding type portable computer according to an embodiment of the present invention. A wide pitch line 65 is a tooth root circle between one tooth 63 and another adjacent tooth 63. 8B is a plan view showing a hinge gear for a foldable portable computer according to another embodiment of the present invention, and the wide pitch line 65 is one of the teeth 63 and the neighboring shows that it can be provided along a pitch circle between the other teeth 63, and FIG. 8c is a plan view showing a hinge gear for a folding type portable computer according to another embodiment of the present invention, a wide pitch line (65) shows that it can be provided along the tooth end circle between one of the teeth 63 and the other neighboring teeth 63, and further, the wide pitch line 65 is as shown in FIG. 6A. The same may further include an identification color layer 66 painted on the surface.

In this way, the wide pitch line 65 is provided along the root circle, the pitch circle or the tip circle between any one tooth 63 and the other adjacent tooth 63, or on the surface of the wide pitch line 65. By forming the identification color layer 66, the hinge gear 60 together with the pinion gears 50 according to the different assembly angles of the base shaft 20 and the display shaft 40, which are the components of the hinge module H of the notebook computer. ), the wide pitch line 65 and the hinge gear 60 can be quickly checked when assembling, and the key fixing according to the vertical direction can be accurately realized, which is preferable.

9A is a perspective perspective view showing a hinge gear injection mold for a folding portable computer according to the present invention, FIG. 9B is a longitudinal cross-sectional view showing a hinge gear injection mold for a folding portable computer according to the present invention, and FIG. It is a main part plan sectional view showing the hinge gear injection mold for a folding type portable computer.

As shown in FIGS. 9A to 9C , the hinge gear injection mold for a folding type portable computer according to the present invention has an undercore 71 and the outer wall of the undercircular groove 72 spaced apart from the undercore 71 is directed inward. An upper core 81 having an undermold 70 having tooth protrusions 73 and tooth grooves 74 alternately arranged at a jagged and even pitch, and an upper core 81 matching the undercore 71 . ) while providing an upper circular groove 82 spaced apart from the upper mold 80 to be incorporated into the under mold 70 .

The shaft hole 62 of the hinge gear 60 is provided by the matching of the under core 71 and the upper core 81 , and the cylindrical body 61 of the hinge gear 60 is provided by the under circular groove 72 . The teeth 63 and tooth grooves 64 of the hinge gear 60 are provided by the tooth projections 73 and the tooth grooves 74, wherein the hinge gear 60 is made of stainless steel (SUS430 or SUS630). (materials capable of heat treatment, etc.)) The melt is injected into the under-mold 70 and the upper mold 80 so that it can be manufactured by injection molding to ensure speed in mass production and to improve accuracy while minimizing the defect rate.

At this time, the under-mold 70 has a pitch (specifically, the base axis 20 and the display axis ( 40), a wide pitch space gap 75 provided by relatively spaced apart a pitch corresponding to the key direction of the undercore 71 and the upper core 81 for forming the shaft hole 62 for which the key is fixed to match the angle of 40). ), and the under mold 70 or upper mold 80 has a gate hole 90 facing the wide pitch space gap 75 .

When manufacturing the hinge gear 60 having a diameter of 4.5 mm, or even a diameter of 3.5 mm and progressively smaller, a gate hole 90 is provided in the teeth 63, tooth grooves 64 or the cylindrical body 61. In this case, the hardened stainless steel melt remains as a burr during demolding of the under-mold 70 and the upper mold 80. In consideration of the fact that the precision of the cylindrical body 61 is remarkably deteriorated and inevitably becomes defective, in the present invention, the wide width for forming the wide pitch line 65 of the hinge gear 60 used only for identification of the operator The gate hole 90 is directed to the pitch space gap 75 so that the defect rate during injection molding of the hinge gear 60 can be significantly reduced.

10 is a plan view of the under-mold 70 showing definitions of terms for describing the hinge gear injection mold for a clamshell portable computer according to the present invention. , a garden along the center between the root and the tip of the undermold 70 is called a pitch circle, and a garden along the tip of the undermold 70 is called a tip circle.

11A is a plan view showing an under mold 70 of a hinge gear injection mold for a folding type portable computer according to an embodiment of the present invention. A wide pitch line 65 is formed along the tooth root circle between one tooth 63 of the hinge gear 60 and the other adjacent tooth 63 provided along the tooth end circle between one tooth projection 73. Injection molding is shown, and FIG. 11B is a plan view showing the under mold 70 of the hinge gear injection mold for a folding portable computer according to another embodiment of the present invention. It is provided along the pitch circle between the tooth protrusion 73 and the other adjacent tooth protrusion 73, and the pitch circle between any one tooth 63 of the hinge gear 60 and the other adjacent tooth 63 injection molding of the wide pitch line 65 along A pitch space gap 75 is provided along a tooth root circle between any one tooth protrusion 73 and the other adjacent tooth protrusion 73, and any one tooth 63 of the hinge gear 60 and the other adjacent teeth Injection molding of the wide pitch line 65 along the tooth end circle between one tooth 63 is shown.

As described above, while directing the gate hole 90 to the wide pitch space gap 75 for forming the wide pitch line 65 of the hinge gear 60 used only for identification of the operator, the wide pitch space gap 75 is provided in the tooth end circle, the pitch circle, or the tooth root circle of the undermold 70 to make the hinge gear 60 different assembly of the base shaft 20 and the display shaft 40, which are the components of the hinge module H of the notebook computer. When assembling together with the pinion gears 50 according to the angle, it is possible to quickly check the wide pitch lines 65 of the hinge gears 60 and accurately realize the key fixing according to the vertical direction, which is preferable.

The present invention can be used in industrial fields related to clamshell portable computers such as notebook computers or clamshell portable terminals that can be folded, right angle unfolded and horizontally unfolded. can be applied.

B : base board D : display board
H : Hinge module 10 : Base bracket
20: base axis 30: display bracket
40: display axis 50: pinion gear
60: hinge gear 61: cylindrical body
62: shaft hole 63: tooth
64: tooth groove 65: wide pitch line
66: identification color layer 70: under mold
71: under core 72: under circular groove
73: this protrusion 74: e-home
75: wide pitch space gap 80: upper mold
81: upper core 82: upper circular groove
90: gate hole

Claims (4)

Having the undercore 71 and having tooth protrusions 73 and tooth grooves 74 alternately arranged at an even pitch jagged inwardly of the outer wall of the undercircular groove 72 spaced apart from the undercore 71. An upper circular groove 82 spaced apart from the upper core 81 while having an undermold 70 and an upper core 81 matched to the undercore 71 is provided, and the undermold 70 is molded into the undermold 70 . Including the upper mold (80),
The undermold 70 is a wide pitch space gap 75 provided by relatively spacing the pitch between any one of the two protrusions 73 and the other adjacent two protrusions 73 . to provide
The hinge gear injection mold for a foldable portable computer, characterized in that the undermold (70) or upper mold (80) has a gate hole (90) facing the wide pitch space gap (75). According to claim 1,
The wide pitch space gap (75) is provided along the tip circle between the one tooth projection (73) and the other adjacent tooth projection (73). . According to claim 1,
The wide pitch space gap (75) is provided along a pitch circle between one of the two protrusions (73) and the other adjacent two protrusions (73). . According to claim 1,
The wide pitch spatial gap (75) is provided along the root circle between the one tooth projection (73) and the other adjacent tooth projection (73). .

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