Portable Bunker Rake

Abstract

To provide a portable bunker rake that is convenient for taking or carrying, and is superior in compactness and design property when in non-use.SOLUTION: A bunker rake includes a handle part 1, an arm part 2, and a head part 3. The handle part 1 is composed of a cylindrical body 10 having a storage chamber 13 inside. The arm part 2 includes a slide arm 20 capable of moving in the storage chamber 13. The head part 3 includes a bar 30 provided at the tip end of the slide arm in a turning manner. When in non-use of the bunker rake, the bar 30 is arranged at a non-use position where it is arranged substantially parallel to the slide arm 20, and the slide arm 20 is arranged at the storage position where it is entirely stored in the storage chamber 13, so that the entire head part 3 and the arm 2 are brought into a state of being completely stored in the storage chamber 13.SELECTED DRAWING: Figure 5

Description

[Technical field]

[0001] The present invention relates to a bunker rake, that is, a maintenance tool for leveling sand in a bunker (sandbox) on a golf course, and more particularly to a portable bunker rake that is easy to transport. [Background technology]

[0002] When a player enters a bunker (sandbox), the sand surface becomes rough and uneven due to footprints and the like, or the sand becomes compacted. For this reason, after playing in the bunker, it is customary to use a bunker rake to level the rough or compacted sand (maintenance work) to return it to its original state. Generally, bunker rakes are permanently installed in each bunker on a golf course. However, since the bunker rake itself is a non-natural (man-made) obstacle, there has been a problem in that if a shot (golf ball) hits a bunker rake that is permanently installed or left unattended in the bunker, it creates a sense of unfairness and discomfort for the player. For this reason, various highly portable bunker rakes have been proposed to eliminate the need for permanent installation of bunker rakes.

[0003] Conventional bunker rakes with improved portability or portability include the following: Patent document 1 relates to a "portable bunker leveller for golf" in which the bunker leveller (bunker rake) has a bunker leveller plate that can be opened and closed or attached and detached to a control rod or club so that it can be stored in a golf bag (see the claims and drawings of patent document 1). Patent Document 2 relates to a "bunker rake" in which the handle (1) is formed of an outer cylinder (4) and an inner cylinder (6) that can be inserted and removed from the outer cylinder, and the teeth (13) are folded or unfolded according to the insertion and removal of the inner cylinder (6). This makes the rake compact, making it easy to transport and easy to operate with one hand (see the specification of Patent Document 2, page 10, column "(3) Effect of the Invention" and each drawing). In addition to the above Patent Documents 1 and 2, a "portable bunker rake" (Patent Document 3) and a "portable bunker leveling tool" (Patent Document 4) have been proposed, which are convenient to carry and can be easily assembled when in use. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Japanese Patent Publication No. 48-80303 [Patent Document 2] Japanese Utility Model Application Publication No. 62-61266 [Patent Document 3] Jitsuhei No. 01-23498 Publication Publication [Patent Document 4] Japanese Utility Model Application Publication No. 58-136170 Summary of the Invention [Problem to be solved by the invention]

[0005] However, even the conventional bunker rakes that have been devised as described above are not necessarily excellent in portability. In particular, they do not fully satisfy customers in terms of compactness and design when not in use (for example, when folded).

[0006] Furthermore, with the spread of coronavirus infection both domestically and internationally since the beginning of 2020, an atmosphere and mentality has been fostered whereby "people want to avoid touching permanently installed bunker rakes on golf courses that are used by an unspecified number of people as much as possible." As a result, there has been an increased demand recently for bunker rakes that are easy to carry or carry around.

[0007] The present invention has been made in consideration of the above circumstances. An object of the present invention is to provide a portable bunker rake that is convenient to carry and is compact when not in use and has an excellent design. [Means for solving the problem]

[0008] The present invention relates to a portable bunker rake having a handle portion, an arm portion, and a head portion, The handle portion is formed of a long cylindrical body having a long storage chamber therein, the arm portion includes a slide arm that is movable within a storage chamber of the handle portion, and the slide arm is switchably positioned between an exposed position in which a tip portion of the slide arm is exposed to the outside of the storage chamber and a stored position in which the entire slide arm is stored within the storage chamber; the head portion comprises a bar rotatably provided at a tip end of the slide arm, the bar being a straight bar having no protrusions on its outer surface, the bar being switchably positioned between a use position in which it is disposed substantially perpendicular to the slide arm and a non-use position in which it is disposed substantially parallel to the slide arm, The Portable When the bunker rake is in use, the slide arm of the arm portion is disposed at the exposed position and the bar of the head portion is disposed at the use position, The Portable This portable bunker rake is characterized in that when the bunker rake is not in use, the rod material of the head portion is placed in an unused position and the slide arm of the arm portion is placed in a stored position, and the entire head portion and arm portion are stored within the storage chamber of the cylindrical body that constitutes the handle portion.

[0009] In the present invention, it is preferable that the bar be rotatably connected to the tip end of the slide arm by a hinge mechanism provided between the head portion and the arm portion.

[0010] Further, in the present invention, preferably, the arm portion is provided with a head portion fixing mechanism for fixing the rod member of the head portion at the use position, the head fixing mechanism is composed of a retaining sleeve slidably attached to the slide arm and a locking spring provided in a midway position of the slide arm so as to be able to protrude and retract, The retaining sleeve is switchable between a fixed position, in which the retaining sleeve is positioned between the rod member and the locking spring when the rod member is positioned in the use position, and a released position, in which the retaining sleeve is positioned between the locking spring and the base end of the slide arm.

[0011] Furthermore, in the present invention, it is preferable that a cap be provided at the tip of the cylindrical body constituting the handle portion in order to prevent the stored items from flying out of the storage chamber.

[0012] Further, in the present invention, preferably, the rod material of the head portion is Since it is a straight rod-shaped material with no protrusions on its outer surface, When using a bunker rake, the entire bar can be submerged in the sand of the bunker. Cut. Effect of the Invention

[0013] According to the portable bunker rake of the present invention, Portable When the bunker rake is not in use, the rod material of the head portion is placed in an unused position and the slide arm of the arm portion is placed in a stored position, and the entire head portion and arm portion are stored within the storage chamber of the cylindrical body that constitutes the handle portion. This makes it convenient to carry and portable, and also has excellent compactness and design when not in use.

[0014] According to a preferred embodiment of the present invention, the arm portion is provided with a head portion fixing mechanism for fixedly holding the rod material of the head portion in the use position, and the head portion fixing mechanism is composed of a retaining sleeve slidably attached to the slide arm and a locking spring arranged to be capable of emerging and retracting at a midpoint of the slide arm. Thus, when the retaining sleeve is placed in the fixed position, the rear end of the retaining sleeve engages with the locking spring and the front end of the retaining sleeve engages with the bar, thereby holding the bar fixedly in the use position, while the retaining sleeve can be switched from the use position to the non-use position by switching the retaining sleeve from the fixed position to the release position.

[0015] According to a preferred embodiment of the present invention, a cap is provided at the tip of the cylinder constituting the handle, thereby preventing the stored items (i.e., the arm and head when stored) from jumping out of the storage chamber in the handle.

[0016] According to a preferred embodiment of the present invention, A straight rod-shaped material with no protrusions on its outer surface. The head, which is made of a rod, can be inserted into the sand of the bunker and used, so that the bunker rake can be operated to loosen the sand from the inside and level the surface of the sand. Therefore, according to the present invention, the bunker can be maintained in a desired condition while maintaining the softness of the bunker and without leaving claw marks on the surface of the sand. [Brief description of the drawings]

[0017] [Figure 1] 1 is an overall perspective view of a bunker rake according to one embodiment of the present invention (in use). [Diagram 2] Overall perspective view of the bunker rake (fully retracted). [Diagram 3] FIG. 2 is an enlarged perspective view of the tip of the bunker rake in use. [Figure 4] FIG. 4 is a partially enlarged perspective view of the bunker rake during a head folding operation. [Diagram 5] FIG. 2 is a partial perspective view of the interior of a bunker rake in a generally stored state. [Figure 6] The components of the bunker rake are shown in FIG. 1A, where FIG. 1B is a vertical cross-sectional view of the stopper tube. [Figure 7] FIG. 4 is a schematic side view showing the hinge mechanism in an exploded state. [Figure 8] FIG. [Figure 9] FIG. 4 is an enlarged perspective view showing a locking spring located midway along the slide arm. [Figure 10] (A) and (B) are schematic diagrams showing an outline of how to use a bunker rake. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0018] Hereinafter, an embodiment of the present invention will be described with reference to the drawings. Fig. 1 shows an overall view of the bunker rake of this embodiment when in use. As shown in Fig. 1, the bunker rake of this embodiment includes a long handle portion 1, an arm portion 2, and a head portion 3. Fig. 2 shows an overall view of the same bunker rake when not in use. As shown in Fig. 2, when not in use, the arm portion 2 and the head portion 3 are completely stored within the handle portion 1 of the bunker rake, giving the appearance that the bunker rake is made up of only the handle portion 1.

[0019] (Handle section) As shown in Fig. 5, the handle portion 1 is composed of a long, hollow cylinder 10, which is made of synthetic resin (e.g., polyvinyl chloride) or metal. The tip end 11 of the cylinder 10 is an open end, while the base end 12 of the cylinder is a closed end made of a sealing material (not shown), and a long storage chamber 13 is defined inside the cylinder 10. A cap 14 is provided at the tip region of the handle portion 1 for opening and closing the open end 11 at the tip of the cylinder. A stopper tube 15 is attached inside the cylinder 10 at the tip position of the storage chamber 13 to prevent the arm portion 2 from jumping out of the storage chamber 13 and falling off (the stopper tube 15 will be explained later).

[0020] (Arm section) As shown in FIGS. 3, 4 and 5, the arm portion 2 includes a slide arm 20 and a slide adapter 25. The slide arm 20 and slide adapter 25 are arranged in a circumferential direction. The slide arm 20 is a single rod-shaped member made of metal (e.g., stainless steel). A tip end (front end) 21 of the slide arm 20 is movably connected to the head unit 3 via a hinge mechanism 4 described below. A base end (rear end) 22 of the slide arm 20 is connected and fixed to a sliding adapter 25.

[0021] The sliding adapter 25 is a short cylindrical member as shown in Fig. 6(A), and is slidably provided in the storage chamber 13 of the handle portion 1 as shown in Fig. 5. At the center of the sliding adapter 25, the proximal end portion (rear end portion) 22 of the slide arm 20 is fixed in a penetrating state, and the two are integrated. Therefore, the sliding adapter 25 and the slide arm 20 can move back and forth along the longitudinal axis direction in the storage chamber 13.

[0022] Fig. 6(B) shows a longitudinal section of the stopper cylinder 15 attached in the cylindrical body 10 at the tip position of the storage chamber 13. As shown in this figure, the inner peripheral wall 15a of the stopper cylinder 15 is formed in a tapered shape (that is, a conical shape) that tapers towards the front end so that the inner diameter D1 at a position closer to the front end of the stopper cylinder 15 is slightly smaller than the inner diameters D2 at the middle position and the position closer to the rear end of the stopper cylinder (D1 < D2). And the outer diameter D3 of the sliding adapter 25 is generally set so that D1 < D3 < D2. That is, the inner diameter D1 at the position closer to the front end of the stopper cylinder 15 is smaller than the outer diameter D3 of the sliding adapter 25. Therefore, even when the sliding adapter 25 reaches near the tip (front end) of the storage chamber 13 and enters the stopper cylinder 15, the sliding adapter 25 is prevented from further advancing in the stopper cylinder 15, so it will not pass through the stopper cylinder 15 and jump out of the storage chamber 13 and fall off from the handle portion 1. Also, at the position where the sliding adapter 25 has advanced furthest in the stopper cylinder 15, a large frictional force is generated between the outer peripheral portion of the sliding adapter 25 and the inner peripheral wall 15a of the stopper cylinder 15, and due to this frictional force, the sliding adapter 25 is temporarily fixed at the furthest advanced position. As a result, the slide arm 20 is stably held at the exposed position.

[0023] Thus, the arm portion 2 is composed of the sliding adapter 25, the forward movement of which can be restricted by the stopper tube 15, and the slide arm 20, the base end (rear end) 22 of which is connected and fixed to the sliding adapter 25. Therefore, the slide arm 20 can appear and disappear (protrude or retract) from the storage chamber 13 according to the sliding arrangement of the sliding adapter 25 within the storage chamber 13. That is, the slide arm 20 can be switched between an exposed position (FIGS. 1 and 3) in which the tip end (front end) 21 is exposed to the outside of the storage chamber 13, and a stored position (FIGS. 2 and 5) in which the entire slide arm 20 is stored within the storage chamber 13.

[0024] (Head section) As shown in Figures 1, 3 and 4, the head portion 3 is composed of a single straight bar 30. In this embodiment, the bar 30 is a round bar (a bar with a circular cross section) made of metal (e.g., stainless steel). The bar 30 constituting the head portion 3 is simply a straight bar-shaped material and has no claws or other protrusions / projections / unevennesses on its outer surface, so that when the bunker rake is used, the entire bar 30 (i.e., the entire head portion 3) can be easily immersed in the sand of the bunker (see Figure 10).

[0025] As shown in FIG. 4, a hinge mechanism 4 is provided between the head portion 3 (specifically, the center position of the bar 30) and the arm portion 2 (specifically, the tip portion 21 of the slide arm), and the bar 30 is rotatably connected to the tip portion 21 of the slide arm 20 via the hinge mechanism 4. FIG. 7 shows an outline of the hinge mechanism 4 used in this embodiment. As shown in FIG. 7, a pair of support pieces 41 facing each other (up and down as viewed in FIG. 7) are formed at the tip portion 21 of the slide arm, and a supported piece 42 that can be inserted between the pair of support pieces 41 is provided on the side of the bar 30. Then, with the supported piece 42 inserted between the pair of support pieces 41, the hinge mechanism 4 is configured by connecting these three parts with each other using a shaft portion (or pin material) 43 that penetrates them. Such a hinge mechanism 4 is generally known.

[0026] Incidentally, the movable range (rotation range) of the bar 30 relative to the slide arm 20 is in the range of an angle between the slide arm 20 and the bar 30 from zero degrees (0°) to 90°. The state where the angle between the two is zero degrees refers to a state when the slide arm 20 and the bar 30 are not in use, for example, as shown in FIG. 5, in which the slide arm 20 and the bar 30 are substantially parallel, and in this state, the slide arm 20 and the bar 30 can be stored together in the storage chamber 13. On the other hand, the state where the angle between the two is 90° refers to a state when the slide arm 20 and the bar 30 are in use, for example, as shown in FIG. 3, in which the bunker rake can perform its original leveling function. In this way, the bar 30 constituting the head part 3 can be switched between a use position where the bar is disposed substantially perpendicular to the slide arm 20 and a non-use position where the bar is disposed substantially parallel to the slide arm 20.

[0027] However, simply connecting the bar 30 to the slide arm 20 with a hinge will cause the bar 30 to wobble during use and make the position unstable. Therefore, a means for fixing the bar 30 in the use position (FIG. 3) is required, and this is the "head fixing mechanism" described next.

[0028] (Head fixing mechanism) As shown in Figures 3 and 4, the arm portion 2 is provided with a head portion fixing mechanism 5, which is composed of a retaining sleeve 50 that can slide on the slide arm 20, and a locking spring 55 arranged midway along the slide arm 20.

[0029] The fastening sleeve 50 is a short pipe-shaped sleeve-shaped member, and is fitted onto the slide arm 20 so as to be slidable along the slide arm 20. As shown in FIG. 8 in particular, a pair of front engagement parts 51 are formed on the front edge of the fastening sleeve 50, one on the left and one on the right, which can engage with the bar 30 of the head portion. Each of the front engagement parts 51 is formed as a curved recess having an arc shape complementary to the arc shape of the bar in the circumferential direction. Therefore, when the fastening sleeve 50 approaches and abuts against the bar 30 arranged in the approximate use position, each of the front engagement parts 51 of the fastening sleeve 50 fits tightly against the outer circumferential surface of the bar 30 at each abutment position (two positions in total). Due to this tight fit, the bar 30 is aligned at a right angle to the slide arm 20, and is accurately fixed or held in the intended use position. On the other hand, by pulling the fastening sleeve 50 away from the bar 30 so that they are no longer in contact with each other, the fastening action of the fastening sleeve 50 on the bar 30 is released.

[0030] When the fastening sleeve 50 abuts against the bar 30, the fastening sleeve 50 is located at a position (advanced position) between the bar 30 located at the use position and the locking spring 55 (FIG. 3), and this advanced position is called the "fixed position" of the fastening sleeve 50. When the fastening sleeve 50 retreats in a direction away from the bar 30 and is located at a position (retracted position) between the locking spring 55 and the base end 22 of the slide arm (FIG. 4), this retreated position is called the "released position" of the fastening sleeve 50.

[0031] On the other hand, a rear engagement portion 52 capable of engaging with a locking spring 55 is formed at one location on the rear end of the retaining sleeve 50. This rear engagement portion 52 is formed as a notched recess (52) that opens on the rear end edge of the retaining sleeve 50 so as to be able to accommodate the locking spring 55 protruding from the outer circumferential surface of the slide arm 20.

[0032] As shown in Figs. 4 and 9, the slide arm 20 is provided with a spring accommodating recess 23 at a position about one-third of the total length of the arm from the tip thereof, and a locking spring 55 is attached to the spring accommodating recess 23. The locking spring 55 is a deformed leaf spring material obtained by bending a roughly rectangular metal leaf spring material at multiple points. In a natural state (unloaded state) in which the locking spring 55 is attached to the spring accommodating recess 23 of the slide arm, a top portion 55a of the locking spring 55 protrudes outward from the outer circumferential surface of the slide arm. In contrast, in a pressed state (loaded state) in which an external force (pressing force) is applied to push the locking spring 55 into the spring accommodating recess 23, the entire locking spring 55 is recessed into the spring accommodating recess 23, and the top portion 55a of the locking spring does not protrude from the outer circumferential surface of the slide arm. That is, in a pressed state in which the top portion 55a of the locking spring does not protrude, the locking spring 55 does not engage with the rear engagement portion 52 of the locking sleeve, and the movement of the locking sleeve 50 is not restricted by the locking spring 55. In contrast, in a natural state in which the top portion 55a of the locking spring protrudes outward, the locking spring 55 engages with the rear engagement portion 52 of the locking sleeve, and the movement (rearward movement, backward movement) of the locking sleeve 50 is restricted by the locking spring 55.

[0033] To summarize the main points of the head fixing mechanism 5, in terms of the movable range of the fastening sleeve 50, which is one of the components of the head fixing mechanism 5, the fastening sleeve 50 can be switched between a fixed position in which it is disposed between the bar 30 disposed at the use position and the locking spring 55, and a released position in which it is disposed between the locking spring 55 and the base end 22 of the slide arm. When the fastening sleeve 50 is disposed at the fixed position (FIG. 3), the front engagement portion 51 of the fastening sleeve engages with the bar 30, and the (protruding) locking spring 55 engages in the rear engagement portion 52 of the fastening sleeve, making it impossible for the fastening sleeve 50 to move back, thereby holding the bar 30 fixedly at the use position. On the other hand, by pressing the locking spring 55 and causing it to sink into the spring accommodating recess 23 against its spring elasticity, the engagement between the rear engagement portion 52 of the fastening sleeve and the locking spring 55 is released, and the fastening sleeve 50 can be moved back. Then, by sliding the retaining sleeve 50 from the fixed position (Figure 3) to the released position (Figure 4), the bar 30 can be switched from the use position to the unused position (see the series of steps from Figure 3 to Figure 4 to Figure 5).

[0034] (About the usage, action and effect of bunker rake) When using the bunker rake of this embodiment, first, the cap 14 is removed from the tip of the handle part 1, the slide arm 20 in the storage chamber 13 is switched from the storage position to the exposed position, and the slide arm 20 is extended to the maximum extent in front of the handle part 1. In this maximum extension state, the slide arm 20 is temporarily fixed to the handle part 1 based on the frictional force between the sliding adapter 25 and the inner peripheral wall 15a of the stopper tube. Next, the bar 30 of the head part is switched from the unused position to the used position (see the change in posture from FIG. 4 to FIG. 3), and the bar 30 is positioned approximately perpendicular to the slide arm 20. Next, while pressing the locking spring 55 to recede into the spring accommodating recess 23, the retaining sleeve 50 on the slide arm 20 is advanced from the release position to the fixed position (see the sliding movement from FIG. 4 to FIG. 3), and the front engagement part 51 of the retaining sleeve 50 is abutted and engaged with the bar 30. In response to this, the locking spring 55 within the rear engagement portion 52 of the retaining sleeve 50 is released and protrudes, engaging with the rear engagement portion 52. This brings the retaining sleeve 50 into a locked state in which it cannot be retracted, and fixes the bar 30 in a position perpendicular to the slide arm 20 (i.e., in the use position). Thus, the bunker rake in use as shown in Figures 1 and 3 is completed.

[0035] FIG. 10 shows an overview of sand leveling work using the bunker rake of the present invention. When leveling sand in a bunker, first, as shown in FIG. 10(A), the head 3 (bar 30) of the bunker rake is immersed in the rough sand, for example, 1 to 5 cm deep, depending on the roughness of the sand surface and the compaction of the sand. Then, the entire bunker rake is pulled and moved horizontally in the direction of arrow A. Then, as shown in FIG. 10(B), the head 3 in the sand also moves horizontally in conjunction with the horizontal movement of the bunker rake, and the sand inside the bunker (underground part) is loosened, and the uneven surface is smoothed by the physical stimuli (e.g. vibrations and the uplifting / pushing action of sand from underground to the ground surface) generated when the head 3 moves through the sand. In this way, according to the bunker rake of the present application, the sand surface of the bunker can be leveled while the sand in the bunker is loosened from the inside by operating the bunker rake. Since the head 3 of the bunker rake is inserted into the sand to loosen it from the inside, the bunker can be kept at a desired softness (moderate hardness). Also, since it does not directly level the sand surface with claws like conventional bunker rakes, it does not leave claw marks on the sand surface, and even beginners can smooth the sand surface to a relatively clean condition.

[0036] To transition the bunker rake of this embodiment from the in-use configuration (FIGS. 1 and 3) to the folded storage configuration (FIGS. 2 and 5), first, the locking spring 55 is pressed and retracted into the spring accommodation recess 23 to release the engagement between the locking spring 55 and the rear engagement portion 52 of the locking sleeve 50 (i.e., unlock), thereby allowing the locking sleeve 50 to retract. Then, the locking sleeve 50 on the slide arm 20 is retracted from the fixed position to the released position (see the sliding movement from FIG. 3 to FIG. 4), and the abutment and engagement between the front engagement portion 51 of the locking sleeve 50 and the bar 30 is released. Next, the bar 30 of the head portion is rotated relative to the slide arm 20 to switch the bar from the use position to the non-use position (see the change in posture from FIG. 3 to FIG. 4 and 5), and finally the bar 30 is positioned approximately parallel to the slide arm 20. Next, by pushing the slide arm 20 together with the bar 30 towards the storage chamber 13, the temporary fixation of the slide arm 20 based on the frictional force between the inner peripheral wall 15a of the stopper cylinder and the sliding adapter 25 is released, and the slide arm 20 together with the bar 30 is switched from the exposed position to the stored position (see FIG. 5). When the entire bar 30 and slide arm 20 are stored in the storage chamber 13, the open end of the handle portion 1 is closed with the cap 14, completing the folding and storage of the bunker rake (see FIG. 2).

[0037] According to this embodiment, the slide arm 20 constituting the arm portion 2 is a single rod-shaped member, and the rod material 30 constituting the head portion 3 is also a single straight rod material, and furthermore, both (20, 30) can be folded in a substantially parallel state as shown in Fig. 5, so that the entire arm portion 2 and head portion 3 can be completely stored within the handle portion 1 as shown in Fig. 2. Therefore, the bunker rake of this embodiment is very portable, easy to carry, and easy to transport, and is also compact and stylish when not in use. [Explanation of symbols]

[0038] 1 Handle 10 Cylinder 13 Storage Room 14 Cap 15 Stopper tube 2 Arm section 20 Slide arm 21 Tip of slide arm (front end) 22 Base end (rear end) of slide arm 23 Spring receiving recess of slide arm 25 Sliding adapter 3 Head section 30 Bar material 4 Hinge mechanism 5 Head fixing mechanism 50 Retaining sleeve 55 Locking spring

Claims

1. A portable bunker rake comprising a handle portion (1), an arm portion (2), and a head portion (3), The handle portion (1) is composed of a long cylindrical body (10) having a long storage chamber (13) therein, the arm portion (2) includes a slide arm (20) movable within a storage chamber of the handle portion, and the slide arm can be switched between an exposed position in which a tip portion of the slide arm is exposed to the outside of the storage chamber and a stored position in which the entire slide arm is stored within the storage chamber; the head portion (3) includes a bar (30) rotatably provided at the tip of the slide arm, the bar (30) being a straight bar-shaped material having no protrusions on its outer surface, and the bar (30) is switchably positioned between a use position in which it is disposed substantially perpendicular to the slide arm and a non-use position in which it is disposed substantially parallel to the slide arm; When the portable bunker rake is in use, the slide arm (20) of the arm portion is disposed in the exposed position and the bar (30) of the head portion is disposed in the use position; This portable bunker rake is characterized in that, when the portable bunker rake is not in use, the rod material (30) of the head portion is placed in an unused position and the slide arm (20) of the arm portion is placed in a stored position, so that the entire head portion (3) and arm portion (2) are stored within the storage chamber (13) of the cylindrical body (10) that constitutes the handle portion (1).

2. 2. The portable bunker rake according to claim 1, wherein the rod (30) is rotatably connected to the tip of the slide arm (20) by a hinge mechanism (4) provided between the head portion (3) and the arm portion (2).

3. The arm portion (2) is provided with a head portion fixing mechanism (5) for fixing the rod member (30) of the head portion at the use position, The head fixing mechanism (5) is composed of a retaining sleeve (50) slidably attached to the slide arm and a locking spring (55) provided in a retractable manner at a midpoint of the slide arm, 3. The portable bunker rake according to claim 1 or 2, characterized in that the locking sleeve (50) can be switched between a fixed position, in which the locking sleeve is disposed between the rod member disposed in a use position and the locking spring, and a released position, in which the locking sleeve is disposed between the locking spring and the base end of the slide arm.

4. A portable bunker rake as described in any one of claims 1 to 3, characterized in that a cap (14) is provided at the tip of the cylindrical body (10) constituting the handle portion (1) to prevent stored items from flying out of the storage chamber (13).

5. A portable bunker rake as described in any one of claims 1 to 4, characterized in that the rod (30) of the head portion is a straight rod-shaped material having no protrusions on its outer surface, so that when the bunker rake is in use, the entire rod (30) can be submerged in the sand of the bunker.

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