Park golf club head and method of manufacturing the same

Abstract

The present invention relates to a park golf club head and a method for manufacturing the same, which prevents moisture from penetrating between a wooden head body and a striking face member, and prevents cracking and improves durability by maximizing bonding strength using an epoxy resin and a trapezoidal internally expanding bonding groove formed internally without screw fastening. The park golf club head comprises: a wooden head body having a flat bonding surface formed on its front surface; and a face member attached to the front surface of the head body. The front surface of the head body and the rear surface of the face member each have an internally expanding bonding groove that widens as it goes inward; and a bonding resin part that physically restrains and integrates the head body and the face member by injecting and curing resin into the bonding grooves and the gap between the head body and the face member while the head body and the face member are in close contact.

Description

Technology Field

[0001] The technical field of the present invention relates to a club head for park golf and a method for manufacturing the same, and more specifically, to a club head for park golf and a method for manufacturing the same that prevents moisture from penetrating between a wooden head body and a striking face member, and prevents cracking and improves durability by maximizing bonding strength using an epoxy resin and a trapezoidal internally expanded coupling groove formed internally without screw fastening. Background Technology

[0003] Unlike regular golf, park golf is a sport in which a ball is hit using a wooden club, and it is rapidly becoming popular as it can be easily enjoyed by people of all ages and genders. Generally, park golf club heads are manufactured by forming the body with solid wood materials, such as persimmon or maple, to provide a sense of impact, and attaching a face plate made of materials such as carbon to the front surface (impact surface) where the ball actually makes contact, for rebound force and wear resistance.

[0004] Conventional park golf club heads primarily used a method of attaching the head body and face with an adhesive such as glue, and then securing them by joining multiple screws. However, this conventional method had a problem in that the seam between the head body and the face would separate due to the accumulation of impact during continuous striking.

[0005] In particular, when hitting a ball in humid weather, during rain, or on grass covered with morning dew, moisture penetrates through the gaps. When the wooden head body absorbs moisture and expands, cracks occur in the club head and the screw joints loosen, eventually resulting in fatal defects such as the face plate detaching or breaking. These problems of the conventional technology are clearly illustrated in Fig. 1.

[0006] Korean Registered Patent No. 10-2853369 (registered September 3, 2025) discloses a club head for park golf, wherein the head is formed of wood and a face formed of carbon material is attached to the striking surface of the head; wherein a cover formed of synthetic resin is disposed on the striking surface of the head, while a face is disposed on the outer side of the cover, and the face and the cover are attached to the striking surface of the head by a plurality of fastening screws, a sole is attached to the bottom surface of the head, and a cover is attached to surround the upper surface of the head; The invention includes an epoxy cover formed on the upper surface of the head and the cover, wherein the cover is made of a transparent synthetic resin material, has a coupling hole formed on the upper surface for installing a shaft, and has a plurality of bosses protruding downward on the lower surface, and the epoxy cover is formed of a transparent synthetic resin material, has a coupling hole formed on the upper surface for installing a shaft, and seals the perimeter of the head and the cover, and the head has a coupling hole formed on the upper surface for installing a shaft, a plurality of boss holes formed on the upper surface for fitting and assembling the boss of the cover, and a plurality of screw holes formed on the lower surface for fitting and fastening screws. According to the disclosed technology, the cover is attached and installed to surround the upper surface of the head, and the epoxy cover is formed on the upper surface of the cover, thereby protecting the upper surface of the head from external impact to prevent scratches or damage, while further strengthening the durability of the head so that the golf club can be used for a long time, and additionally, by sealing the perimeter of the head and the cover, the head is protected from high humidity and moisture, thereby preventing deformation.

[0007] Korean Registered Patent No. 10-2881886 (registered on November 3, 2025) discloses a park golf club head having a bolt hole formed on a head body made of wood, and a structure that prevents cracking during bolt fastening assembly to prevent the occurrence of cracks on the upper or lower surface of the head, etc. According to the disclosed technology, in a park golf club head, a face plate on which a golf ball is struck is attached to the front of a wooden head body to which a shaft is attached, a crown is attached to the upper surface of the head body, a copper plate bottom cover is attached to the lower surface of the head body, and a rear end body is attached to the rear of the head body, wherein step portions are formed on each of the two edges of the upper surface of the head body to form step portions on both sides, and as the face plate is attached to the front of the head body, the upper surface of the face plate and the upper surface of the two step portions are aligned with a planar extension line, and as the rear end body is attached to the rear of the head body, the upper surface of the rear end body and the upper surface of the two step portions are aligned with a planar extension line, so that the upper surfaces of the two step portions, the face plate, and the rear end body are each aligned with a planar extension line, and a filling space is formed on the upper surface of the inner head body surrounded by the two step portions, the face plate, and the rear end body, and a plurality of bolt holes are formed on the upper surface of the head body for attachment to the bottom cover, and bolts are fastened to each bolt hole to be attached to the bottom cover, and a liquid resin is filled in the filling space including the bolt holes It is characterized by being configured to prevent the occurrence of cracks on the surface of a head body made of wood by joining a crown to the upper surface of the head body after filling. Prior art literature

[0009] Korean Registered Patent No. 10-2853369 Korean Registered Patent No. 10-2881886 The problem to be solved

[0010] The problem that the present invention aims to solve is to resolve the aforementioned issues by providing a park golf club head and a method for manufacturing the same, which secures strong fastening force without metal screws by forming a special-shaped trapezoidal coupling groove that widens towards the inside on the coupling surface of the head body and the face member and filling it with epoxy resin to join them.

[0011] In addition, the present invention aims to fundamentally block moisture penetration through gaps to prevent cracks caused by the expansion of the wooden body, and to improve the overall durability and striking feel of the club head. means of solving the problem

[0013] As a means of solving the above-mentioned problem, according to one feature of the present invention, a club head for park golf is provided comprising: a head body made of wood material having a flat bonding surface formed on its front surface; and a face member attached to the front surface of the head body, wherein the front surface of the head body and the rear surface of the face member each have an internally expanding bonding groove that widens as it goes inward; and a bonding resin part that physically restrains and integrates the head body and the face member by injecting and curing a resin into the bonding grooves and the gap between the head body and the face member while the head body and the face member are in close contact.

[0014] In one embodiment, the internally expanding coupling groove is characterized by having a cross-section that is trapezoidal in shape.

[0015] In one embodiment, the bonding resin portion comprises epoxy resin, and the head body and the face member are bonded and fixed solely by the bonding resin portion without separate metal screw fastening, and the outer surface of the club head is sealed with a coating resin layer.

[0016] As a means of solving the above-mentioned problem, according to another feature of the present invention, a method for manufacturing a club head for park golf comprises the steps of: molding a head body using wood and preparing a face member to be attached to the front of the head body; processing a coupling groove having a trapezoidal cross-sectional shape, with an internal width wider than the opening on the surface, on the front of the head body and the rear of the face member, respectively; applying a liquid resin to the front of the head body and the rear of the face member to fill the inside of the coupling groove with the resin; attaching the head body and the face member together and then curing the resin to form a coupling resin portion in which the cured resin acts as a wedge within the coupling groove to mechanically bind the two members; and coating the surface of the coupled club head with resin to seal it.

[0017] In one embodiment, the step of machining the coupling groove is characterized by using a CNC machining device, wherein a machining tool, having a lower end wider than its upper end, penetrates the surface of the workpiece and enters vertically, then moves in a lateral direction to machine a line-shaped groove that is wider on the inside. Effects of the invention

[0019] According to the park golf club head and the method for manufacturing the same according to an embodiment of the present invention, the following effects are achieved.

[0020] First, by creating inwardly widening trapezoidal joint grooves on both sides of the head body and the face member and filling the space with epoxy resin to harden it, the hardened resin acts as an anchor to strongly interlock the two members and prevent them from coming apart. This eliminates the need to use conventional metal screws that reduce strength, thereby dramatically improving durability.

[0021] Second, by eliminating screws, completely filling the entire joint surface and internal grooves with resin, and fully coating the exterior with a resin layer, minute gaps between the components are eliminated. Consequently, since moisture cannot penetrate the interior even during high humidity or rain, it effectively prevents head cracking or face separation caused by wood expansion.

[0022] Third, since the components are densely filled with resin without any gaps, maximizing bonding strength, the impact during striking is evenly distributed across the entire head, resulting in improved striking feel and sound. Brief explanation of the drawing

[0024] Figure 1 is a conceptual diagram showing the problem of cracks and separation occurring in conventional park golf club heads. FIG. 2 is a drawing illustrating a park golf club head according to an embodiment of the present invention. Figure 3 is a drawing illustrating the head body and face member in Figure 2. Figure 4 is a drawing illustrating the bonding resin part in Figure 2 as another example. Figure 5 is a drawing illustrating the bonding core in Figure 4. FIG. 6 is a drawing illustrating a method for manufacturing a park golf club head according to an embodiment of the present invention. Figure 7 is a diagram explaining the principle of forming a joint groove through CNC machining as shown in Figure 6. Specific details for implementing the invention

[0025] Below, with reference to the attached drawings, embodiments of the present invention are described in detail so that those skilled in the art can easily implement the invention. However, since the description of the present invention is merely an example for structural or functional explanation, the scope of the rights of the present invention should not be interpreted as being limited by the embodiments described in the text. That is, since the embodiments are subject to various modifications and may take various forms, the scope of the rights of the present invention should be understood to include equivalents capable of realizing the technical concept. Furthermore, the objectives or effects presented in the present invention do not imply that a specific embodiment must include all of them or only such effects; therefore, the scope of the rights of the present invention should not be understood as being limited by them.

[0026] The meaning of the terms described in this invention should be understood as follows.

[0027] Terms such as "first" and "second" are intended to distinguish one component from another, and the scope of rights shall not be limited by these terms. For example, the first component may be named the second component, and similarly, the second component may be named the first component. When a component is referred to as being "connected" to another component, it should be understood that it may be directly connected to that other component, or that there may be other components in between. Conversely, when a component is referred to as being "directly connected" to another component, it should be understood that there are no other components in between. Meanwhile, other expressions describing the relationship between components, such as "between" and "exactly between," or "adjacent to" and "directly adjacent to," shall be interpreted in the same manner.

[0028] A singular expression should be understood to include a plural expression unless the context clearly indicates otherwise, and terms such as "include" or "have" are intended to specify the existence of the set-up features, numbers, steps, actions, components, parts, or combinations thereof, and should be understood not to preclude the existence or addition of one or more other features, numbers, steps, actions, components, parts, or combinations thereof.

[0029] Unless otherwise defined, all terms used herein have the same meaning as generally understood by those skilled in the art to which this invention pertains. Terms defined in commonly used dictionaries should be interpreted as having meanings consistent with the context of the relevant technology and should not be interpreted as having an ideal or overly formal meaning unless explicitly defined in this invention.

[0031] Now, a park golf club head and a method for manufacturing the same according to an embodiment of the present invention will be described in detail with reference to the drawings.

[0032] FIG. 2 is a drawing illustrating a club head for park golf according to an embodiment of the present invention, FIG. 3 is a drawing illustrating a head body and a face member in FIG. 2, FIG. 4 is a drawing illustrating a bonding resin part in FIG. 2 as another example, and FIG. 5 is a drawing illustrating a bonding core in FIG. 4.

[0033] Referring to FIGS. 2 to 5, a park golf club head (10) comprises a head body (100) made of wood material having a flat bonding surface formed on the front surface; and a face member (200) attached to the front surface of the head body (100), wherein the park golf club head comprises a bonding resin part (300).

[0034] An internally expanding coupling groove (110, 210) is formed on the front of the head body (100) and the rear of the face member (200), with the groove becoming wider as it goes inward.

[0035] In one embodiment, the cross-section of the internally expanding coupling groove (110, 210) may be in a trapezoidal shape, as shown in the example in FIG. 2.

[0036] In one embodiment, the internally expandable coupling grooves (110, 210) are formed in a plurality at positions facing each other, as shown in the example in FIG. 3. At this time, they can be formed in a horizontal direction or a vertical direction, and can also be formed in a combination of horizontal and vertical directions. FIG. 3 is an exploded view showing the state in which coupling grooves are formed in the head body and face member in FIG. 2.

[0037] In one embodiment, the internal expansion type coupling groove (110, 210) can be formed with a width of 3 to 5 mm and a depth of 1 to 3 mm, preferably with a width of 4 mm and a depth of 2 mm; additionally, in the case of a trapezoidal shape, the innermost width can be formed with a width of 4 to 6 mm, preferably with a width of 5 mm.

[0038] The bonding resin part (300) is formed by injecting and curing resin into the bonding grooves (110, 210) and the gap between the head body (100) and the face member (200) while the head body (100) and the face member (200) are in close contact, thereby physically restraining and integrating the head body (100) and the face member (200).

[0039] In one embodiment, the bonding resin portion (300) comprises epoxy resin, and the head body (100) and the face member (200) are bonded and fixed solely by the bonding resin portion (300) without separate metal screw fastening, and the outer surface of the club head can be sealed with a coating resin layer (400) as shown in the example illustrated in FIG. 2. At this time, FIG. 2 is a cross-sectional view of a park golf club head completed according to an embodiment of the present invention, showing the formation of the bonding resin portion (300) and the coating resin layer (400).

[0040] In one embodiment, the bonding resin part (300) may further include a bonding core (310) formed within the bonding resin part (300) so as to connect the internally expanding bonding grooves (110, 210) as shown in FIG. 4, thereby assisting in the bonding of the internally expanding bonding grooves (110, 210) so that the head body (100) and the face member (200) can be bonded more strongly.

[0041] The connecting core (310) may be equipped with a connecting bar (311) and two connecting hooks (312), as shown in FIG. 4.

[0042] The connecting bar (311) is formed within the connecting resin part (300) so that the internally expanding connecting grooves (110, 210) are connected, and assists in the connection of the internally expanding connecting grooves (110, 210).

[0043] In one embodiment, the connecting bar (311) is formed such that one end is in close contact with the inner bottom surface of the head-side connecting groove (110) and the other end is in close contact with the inner bottom surface of the face-side connecting groove (210), thereby allowing the head body (100) and the face member (200) to be connected more strongly.

[0044] The coupling hook (312) is formed at each end of the coupling bar (311) and has two wings that are in close contact with the inner surface of the head-side coupling groove (110) and the inner surface of the face-side coupling groove (210), thereby preventing the coupling bar (311) from coming out of the internally expanding coupling groove (110, 210), so that the head body (100) and the face member (200) can be coupled more strongly.

[0045] In one embodiment, the coupling hook (312) is formed to have elasticity that causes the two wings to spread outward, so that when the two wings enter the internal expansion type coupling groove (110, 210), they are folded in, and after entering, they are spread out by elasticity and fixed in close contact with the inner surface of the head-side coupling groove (110) and the inner surface of the face-side coupling groove (210), thereby preventing the coupling bar (311) from coming out of the internal expansion type coupling groove (110, 210) more stably.

[0046] A park golf club head (10) having the configuration described above comprises: a head body (100) made of wood material having a flat bonding surface formed on its front surface; and a face member (200) attached to the front surface of the head body (100); an internally expanding bonding groove (110, 210) having a shape that widens as it goes inward is formed on the front surface of the head body (100) and the rear surface of the face member (200), respectively; liquid resin is injected and cured into the bonding grooves (110, 210) and the gap between the head body (100) and the face member (200) while the head body (100) and the face member (200) face each other, thereby forming a bonding resin part (300) that integrally restrains the head body (100) and the face member (200); in the case of the internally expanding bonding groove (110, 210), the cross-section is implemented in a dovetail shape that is trapezoidal; At this time, the coupling groove (110, 210) is formed through CNC (Computer Numerical Control) machining and consists of an entry hole into which a machining tool enters and a line-shaped groove extended laterally from the entry hole; additionally, the coupling resin part (300) includes epoxy resin, and the entire outer surface of the club head is sealed by a cured coating resin layer (400).

[0047] A park golf club head (10) having the configuration described above has inwardly widening trapezoidal connecting grooves (110, 210) carved on both sides of the head body (100) and the face member (200), and the space is filled with epoxy resin and hardened so that the hardened resin acts as an anchor to strongly interlock the two members and prevent detachment, thereby eliminating the need to use conventional metal screws that reduce strength, and thus significantly improving durability; by eliminating screws and completely filling the entire connecting surface and the internal groove with resin, and coating the exterior with a coating resin layer, fine gaps between the members disappear, and thus moisture cannot penetrate the interior even when humidity is high or rainy, thus fundamentally preventing cracks in the head or separation of the face caused by wood expansion; and since the bonding strength is maximized by tightly filling the members with resin without any empty spaces, the impact during striking is evenly distributed throughout the head, thereby improving the striking feel and sound.

[0048] FIG. 6 is a drawing illustrating a method for manufacturing a park golf club head according to an embodiment of the present invention, and FIG. 7 is a drawing illustrating the principle of forming a coupling groove through CNC machining in FIG. 6.

[0049] Referring to FIGS. 6 and 7, in a method for manufacturing a club head for park golf, first, a head body (100) is formed using wood, and a face member (200) to be attached to the front of the head body (100) is prepared (S601).

[0050] After forming the head body (100) and preparing the face member (200) in the above-described step (S601), a connecting groove (110, 210) having a trapezoidal cross-sectional shape with an internal width wider than the opening on the surface is machined on the front of the head body (100) and the rear of the face member (200), respectively (S602).

[0051] After processing the coupling grooves (110, 210) in the above-described step (S602), liquid resin is applied to the front surface of the head body (100) and the rear surface of the face member (200) to fill the inside of the coupling grooves (110, 210) with resin (S603).

[0052] In the above-described step (S602), when machining the joint groove (110, 210), as shown in FIG. 7, a CNC (Computer Numerical Control) machining device is used, and a machining tool with a lower end wider than the upper end penetrates the surface of the workpiece and moves vertically, then moves in a lateral direction to machine a groove in the shape of a line with a wider inner side.

[0053] After filling the inside of the coupling groove (110, 210) with resin in the above-described step (S603), the head body (100) and the face member (200) are brought into close contact, and then the resin is cured to form a coupling resin part (300) in which the cured resin acts as a wedge within the coupling groove (110, 210) to mechanically bind the two members (S604).

[0054] After forming the bonding resin part (300) in the above-described step (S604), the surface of the bonded club head is coated with resin to seal it (S605).

[0055] The embodiment of the present invention as described above was devised to overcome the fatal problem of conventional park golf clubs in which the wood expands and cracks and the face detaches due to impact and moisture penetration. Referring to FIG. 1, the conventional joining method involves simply bonding the carbon face and the wooden body and then joining them with screws. In this method, if impact is repeated, stress is concentrated in the wood around the screws, and a fine gap (separation) occurs. If moisture enters through this gap and the wood expands, the screw joint becomes loose and eventually a crack occurs. To solve this, the embodiment of the present invention as described above introduces an internally expanding (trapezoidal shape) joining groove (110, 210) structure filled with resin.

[0056] A park golf club head (10) according to an embodiment of the present invention as described above is made of a head body (100) made of wood and a face member (200) made of a synthetic material such as carbon; and a plurality of horizontal coupling grooves (110, 210) are formed on the front surface (the surface in contact with the face) of the head body (100) and the rear surface (the surface in contact with the body) of the face member (200) as shown in the example in FIG. 3.

[0057] A. In the case of the 16th (11th) and the 16th (11th) of

[0058] Referring to Fig. 7, during CNC machining, a machining tool (bit) with a wide end and a narrow column enters vertically into a specific point (tool entry hole) of wood or carbon material, and then moves sideways (lateral direction) to carve out the internal space to machine a groove with a shape that becomes 'wider towards the inside'.

[0059] When assembling, after sufficiently applying and injecting epoxy resin into the front of the head body (100), the rear of the face member (200), and the inside of the trapezoidal joint grooves (110, 210), the two members are pressed together, and the liquid resin fills the wide internal space of the trapezoidal groove. As time passes and the resin hardens, the hardened resin column inside the groove acts as an anchor. Since the opening is narrow and the interior is wide, the hardened resin cannot physically escape, and this generates a strong mechanical locking force that perfectly locks the two members (i.e., the head body (100) and the face member (200)) together without screws, as shown in FIG. 2.

[0060] After the bonding process is finished, a resin layer (400) coated with a clear resin or the like is formed on the entire surface of the assembled club head as shown in FIG. 2. Since the internal grooves are densely filled with resin and the external finish is also coated with resin, any gaps through which moisture can penetrate are completely eliminated. Therefore, it is possible to completely prevent the expansion of the wood due to moisture and the resulting cracking, as well as the detachment of parts due to loosening of screws.

[0061] For the above, embodiments of the present invention are not limited to implementation only through the devices and / or operating methods described above, but may also be implemented through a program for realizing functions corresponding to the configuration of the embodiments of the present invention, a recording medium on which such program is recorded, etc. Such implementation can be easily achieved by a person skilled in the art to which the present invention pertains from the description of the embodiments explained above. Although embodiments of the present invention have been described in detail above, the scope of the present invention is not limited thereto, and various modifications and improvements by those skilled in the art using the basic concepts of the present invention as defined in the following claims also fall within the scope of the present invention. Explanation of the symbols

[0063] 10: Park golf club head 100: Head body 200: Face missing 110, 210: Internal expandable coupling groove 300: Bonding resin part 400: Coating resin layer

Claims

Claim 1 A park golf club head comprising: a wooden head body having a flat bonding surface formed on its front surface; and a face member attached to the front surface of the head body, wherein the front surface of the head body and the rear surface of the face member each have an internally expanding bonding groove that widens as it extends inward; and wherein a bonding resin part is formed such that resin is injected and cured into the bonding grooves and the gap between the head body and the face member while the head body and the face member are in close contact, thereby physically restraining and integrating the head body and the face member, wherein the bonding resin part comprises epoxy resin, and the head body and the face member are bonded and fixed solely by the bonding resin part without separate metal screw fastening, and the outer surface of the club head is sealed with a coating resin layer. Claim 2 A park golf club head according to claim 1, wherein the internally expandable coupling groove is characterized by having a cross-section in the shape of a trapezoid. Claim 3 delete Claim 4 A method for manufacturing a club head for park golf, comprising the steps of: forming a head body using wood and preparing a face member to be attached to the front of the head body; processing a coupling groove having a trapezoidal cross-sectional shape, with an internal width wider than the surface opening, on the front of the head body and the rear of the face member, respectively; applying a liquid resin to the front of the head body and the rear of the face member to fill the inside of the coupling groove with the resin; attaching the head body and the face member together and then curing the resin to form a coupling resin portion in which the cured resin acts as a wedge within the coupling groove to mechanically bind the two members; and coating the surface of the coupled club head with resin to seal it. Claim 5 A method for manufacturing a park golf club head according to claim 4, wherein the step of machining the coupling groove is characterized by using a CNC machining device, wherein a machining tool with a lower end wider than the upper end penetrates the surface of the member and enters vertically, then moves in a lateral direction, and cuts a line-shaped groove with a wider inner side.

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