JP5413039B2 - Portable tools - Google Patents

Description

  The present invention relates to a portable tool.

  In a conventional portable tool, a motor housing that houses a motor, a handle portion that is gripped by a user, a battery holder housing that holds a battery pack, and the like are divided into two-part housings made of synthetic resin or the like. is there. Each of the two-part housings is often formed with two layers of grips made of an elastomer or the like in order to obtain mainly a buffering effect and a non-slip effect of the handle part.

  It is desirable that the grip formed on the handle portion be softer and thicker in order to improve the buffering effect. However, the grip divided into the two-part housing has a parting line on the front surface and the rear surface of the handle portion. Therefore, as the grip becomes softer and thicker, as shown in FIG. 16, there is a problem that the parting line of the grip is displaced and the grip is easily peeled off.

  In relation to the above problem, Patent Document 1 discloses a power tool in which a rear surface of a handle portion where a parting line of a split housing is formed is covered with a rubber cover formed separately from the housing. Has been. According to this electric power tool, since there is no grip parting line on the rear surface of the handle portion that receives pressing force or frictional force from the palm of the user, the grip is difficult to peel off.

JP 2001-198856 A

  According to the electric power tool of Patent Literature 1, since the grip is not formed on the front surface of the handle portion on which the user's finger is applied, it cannot be said that the cushioning effect of the handle portion is sufficient.

  In addition, there are many similar products that differ only in partial specifications for portable tools. For example, there are product groups in which main body parts such as a motor and a hammer case are common, but the battery packs to be mounted are different. In this product group, the shape of the motor housing and the handle portion may be the same, but only the shape of the battery holder housing may be different. In this case, in the conventional split housing, since the motor housing, the handle portion, and the battery holder housing are integrally formed, the housing cannot be shared, and a dedicated housing and mold are required for each product. . Therefore, there is a problem that the manufacturing cost of the parts is high.

  In view of the above problems, an object of the present invention is to provide a portable tool provided with a grip that has a high buffering effect on the handle portion and is difficult to peel off. Moreover, an object of this invention is to provide the portable tool provided with the housing shared between products with different specifications.

In order to achieve the above object, a portable tool according to the first aspect of the present invention provides:
A spindle for holding the tool;
A motor for rotating the spindle;
A housing composed of a motor housing portion that houses the motor, and a handle portion that protrudes from the motor housing portion into a substantially columnar shape;
A handle cover covering the peripheral surface of the handle portion;
A retaining member that is provided at an end of the handle portion, contacts the end surface of the handle cover, and prevents the handle cover from being detached from the handle portion ;
The handle cover is integrally formed in a substantially cylindrical shape,
It is characterized by that.

The handle cover is a laminate of a hard material and a soft material.
It is desirable.

A gap that allows elastic deformation of the handle cover is formed between the handle cover and the handle portion.
It is desirable.

The retaining member holds a secondary battery that supplies power to the motor.
It is desirable.

The retaining member is detachably provided on the handle portion.
It is desirable.

The housing is composed of a pair of split housings joined by screw members,
The retaining member is fixed to the housing by at least one screw member;
It is desirable.

  According to the first aspect of the present invention, it is possible to provide a portable tool having a grip that has a high buffering effect on the handle portion and is difficult to peel off. Moreover, according to the invention which concerns on the 2nd viewpoint of this invention, a portable tool provided with the housing shared between products with different specifications can be provided.

The side view which shows the portable tool which concerns on embodiment of this invention. FIG. 3 is an assembly development view of the main body of the portable tool shown in FIG. 1. FIG. 2 is an assembly development view of the handle cover of the portable tool shown in FIG. 1. FIG. 2 is an assembly development view of the battery holder of the portable tool shown in FIG. 1. The fragmentary sectional view which shows the portable tool shown by FIG. II sectional view taken on the line in FIG. The (a) top view and (b) side view which show the handle cover of the portable tool shown in FIG. II-II sectional view taken on the line in FIG. 8A is a plan view and FIG. 8B is a side view showing a modification of the handle cover shown in FIG. 7. III-III sectional view taken on the line in FIG. Sectional drawing which shows the modification of the handle | steering-wheel cover shown by FIG. The (a) top view and (b) side view which show the hard layer of the handle cover shown by FIG. The (a) top view and (b) side view which show the modification of the hard layer shown by FIG. Sectional drawing which shows the deformation | transformation which arises in the handlebar cover shown by FIG. Sectional drawing which shows the deformation | transformation which arises in the handle | steering-wheel cover shown by FIG. Sectional drawing which shows the deformation | transformation which arises in the grip of the conventional portable tool.

  EMBODIMENT OF THE INVENTION Below, the form for implementing this invention is demonstrated using drawing. For ease of understanding, description will be made with reference to front and rear, top and bottom, and left and right directions shown with arrows in the drawings.

  The portable tool according to the present embodiment is the impact driver 100 shown in FIG.

  As illustrated in FIG. 1, the impact driver 100 includes a main body 50, a handle cover 3, a battery holder 2, and a battery pack 5.

  As shown in FIG. 2, the main body 50 includes a two-part housing 1 including a pair of housings 1 a and 1 b, a motor 9, a control board 10, a hammer case 4, a tip tool holding unit 20, a cooling unit. The fan 8, the switch unit 6, the forward / reverse switching lever 7, and the connection cord 14 are configured.

  The pair of housings 1a and 1b are made of a synthetic resin such as polycarbonate, nylon, ABS, and the like. The motor 9, the control board 10, the cooling fan 8, the switch unit 6, the forward / reverse switching lever 7, and the connection cord 14 are left and right. And are fixed to each other by five retaining screws 13a.

  The housing 1 includes a motor housing portion 51 that accommodates the motor 9, the control board 10, the cooling fan 8, and the like, and a handle portion 52 that accommodates the switch unit 6, the connection cord 14, and the like. The handle portion 52 is formed so as to protrude from the motor housing portion 51 in a substantially columnar shape, and functions as a grip portion of the impact driver 100.

  The motor 9 is a brushless motor that is driven and controlled by the control board 10.

  The hammer case 4 houses a hammer (not shown) connected to the motor 9 and an anvil (not shown) that receives an impact force in the rotational direction from the hammer. A spindle (not shown) extending forward is integrally provided on the anvil (not shown), and a tip tool holding portion 20 is provided at the front end of the spindle.

  The tip tool holding unit 20 can hold a tip tool such as a bit that can be fitted into the cross hole of the screw head.

  The cooling fan 8 is provided on the rotating shaft of the motor 9, causes an air flow inside the motor housing portion 51, and cools the motor 9 and the hammer case 4.

  The switch unit 6 includes a trigger switch 6 a that protrudes forward from the handle portion 52, and functions as a switch for driving and stopping the motor 9.

  The forward / reverse switching lever 7 projects rightward from the vicinity of the boundary between the motor housing portion 51 and the handle portion 52 of the housing 1b and functions as a switch for switching the driving direction of the motor 9.

  The connection cord 14 electrically connects the control board 10 and the switch unit 6 of the main body 50 to the control board 11 and the battery connection terminal 12 of the battery holder 2 described later.

  The handle portion 52 of the housing 1 is formed with a cord insertion hole 21 for inserting the connection cord 14 toward the battery holder 2 and a fitting groove 28 for fixing the battery holder 2.

  As shown in FIGS. 1 and 3, the handle cover 3 includes a grip portion 31 that covers the handle portion 52, a pressing portion 32 that covers the rear surface of the motor housing portion 51, and a finger hook that covers the left and right surfaces of the motor housing portion 51. Part 33 and is integrally formed. As shown in FIG. 7A, the grip portion 31 has a through hole 31a and is integrally formed in a substantially cylindrical shape. Therefore, the grip part 31 is not peeled off from the handle part 52, unlike the conventional split grip.

  As shown in FIG. 3, the housing 1 is formed with an abutting surface 23 that matches the contour of the upper end surface of the handle cover 3. The handle cover 3 is placed on the main body portion 50 from the handle portion 52 side of the housing 1 and is fitted and held on the abutting surface 23 of the housing 1 as shown in FIG. A gap 25 is formed between the handle cover 3 and the housing 1.

  As shown in FIG. 8, the handle cover 3 includes a hard layer 16 and a soft layer 19 that covers the outer surface of the hard layer 16. The hard layer 16 is made of a synthetic resin such as polycarbonate, nylon, or ABS nylon. The soft layer 19 is made of an elastomer or a foamable resin. As described above, since the gap 25 (FIG. 5) is formed between the handle cover 3 and the housing 1, the hard layer 16 gives the handle cover 3 a buffer effect by elastic deformation. Further, the soft layer 19 flexibly adapts to the user's finger and palm, and gives the handle cover 3 a cushioning effect and a non-slip effect.

  The handle cover 3 including the hard layer 16 has high rigidity as compared with a grip formed only from a soft material. Therefore, the handle cover 3 is securely fitted to the abutting surface 23 of the housing 1, and the pressing portion 32 and the finger hook portion 33 are not easily peeled off.

  In addition, since the area | region 26 located in the rear part of the handle | steering-wheel cover 3 shown by FIG. 5 receives the pressing force from a user's palm (especially between thumb and forefinger) intensively, the thickness of the soft layer 19 is larger. It is formed and given a higher buffering effect. Further, the regions 27 located at the front and rear portions of the handle cover 3 receive a gripping force from the user's finger and palm, so that the thickness of the soft layer 19 is changed and formed into a swelled shape that is easy to adapt to the finger and palm. Has been.

  Further, as shown in FIG. 1, since the pressing portion 32 is provided on the rear surface of the motor housing portion 51, the user holds the grip portion 31 with one hand and presses the pressing portion 32 with the other hand. Can do. Therefore, a sufficient load can be applied to the tip tool (not shown) attached to the tip tool holding unit 20.

  Since the finger hook portion 33 is provided on the side surface of the motor housing portion 51, the user can work by placing the index finger on the finger hook portion 33 and the middle finger on the trigger switch 6a. Thereby, even when working with only one hand, a stable load can be applied on the axis of the tip tool (not shown). Further, the finger hooking portion 33 serves to prevent the impact driver 100 from sliding off the inclined surface in addition to preventing the material to be damaged when the impact driver 100 is placed horizontally.

  As shown in FIG. 4, the battery holder 2 includes a pair of battery holder housings 2 a and 2 b, a control board 11, and battery connection terminals 12.

  The pair of battery holder housings 2a and 2b are made of synthetic resin such as polycarbonate, nylon, or ABS, and are joined by sandwiching the control board 11 and the battery connection terminal 12 from the left and right, and are mutually connected by two retaining screws 13b. It is fixed to.

  The control board 11 is connected to a connection cord 14 extending from the main body 50 and constitutes a drive control system for the impact driver 100 together with the control board 10 of the main body 50 described above.

  The battery connection terminal 12 connects an electrode (not shown) of the battery pack 5 described later and a connection cord 14 extending from the main body 50.

  A cord insertion hole 22, a retaining member 24, and a fixing member 29 are formed on the upper surface of the battery holder 2.

  The cord insertion hole 22 is formed to communicate with the above-described cord insertion hole 21 (FIG. 2) formed in the handle portion 52, and the connection cord 14 connected to the control board 11 and the battery connection terminal 12 is inserted therethrough. Has been.

  As shown in FIG. 5, the retaining member 24 contacts the lower end surface of the handle cover 3 to prevent the handle cover 3 from being detached from the housing 1. Further, the retaining member 24 is fitted to the inner peripheral surface of the handle cover 3 that is formed in the shape of a skirt so as to support and fix the handle cover 3.

  As shown in FIGS. 4 and 5, the fixing member 29 is inserted into the housing 1 from below the main body portion 50 and is fixed by two retaining screws 13 c. As shown in FIG. 6, the fixing member 29 has a cross-sectional shape that matches the fitting groove 28 formed in the housing 1a and is fitted. The retaining screw 13c is inserted from the through hole of the housing 1b and screwed into the fixing member 29 of the battery holder 2 to fix the housing 1b and the battery holder 2 to each other. The fixing member 29 of the battery holder 2 and the fitting groove 28 of the housing 1a are engaged in the axial direction of the set screw 13c. Therefore, the fixing member 29 and the retaining screw 13c also serve to join and fix the housings 1a and 1b.

  The battery pack 5 includes a secondary battery that can be attached to and detached from the battery holder 2, and supplies power to the control board 10, the control board 11, and the motor 9.

  As described above, according to the impact driver 100 having the above-described configuration, the grip portion 31 of the handle cover 3 is integrally formed in a substantially cylindrical shape, and thus is not peeled off from the handle portion 52 of the housing 1.

  Moreover, since the handle cover 3 is a laminated body of the hard layer 16 and the soft layer 19, it has high rigidity compared with the grip formed only from the soft material. Therefore, the pressing portion 32 and the finger hook portion 33 of the handle cover 3 are not easily deformed from the shape mounted on the housing 1, and are prevented from being peeled off from the housing 1.

  Further, since the gap 25 is formed between the handle cover 3 and the housing 1, elastic deformation of the hard layer 16 of the handle cover 3 is allowed, and the cushioning effect of the handle cover 3 is improved. Although the cushioning effect of the handle cover 3 is improved by making the soft layer 19 of the handle cover 3 softer and thicker, as shown in FIG. 14, the user's finger and palm are greatly sunk into the soft layer 19, and the tip tool ( The operability may be reduced, for example, the aim of (not shown) may not be determined. Therefore, the elastic deformation of the hard layer 16 contributes to providing the handle cover 3 having both a high cushioning effect and excellent operability without making the soft layer 19 excessively soft and thick.

  The retaining member 24 that contacts the end surface of the handle portion 52 serves to prevent the handle cover 3 from being detached from the handle portion 52 and to securely fix the handle cover 3 fitted to the housing 1.

  Furthermore, since the retaining member 24 is integrally formed with the battery holder 2, the number of parts and the number of assembling steps are reduced.

  Moreover, since the battery holder 2 is configured to be detachable from the housing 1, the housing 1 and the battery holder 2 can be shared with products having different specifications. As a result, the manufacturing cost of the parts can be suppressed, and product variations can be easily expanded.

  Furthermore, the battery holder 2 and the housing 1 can be fixed to each other at the same time as the housings 1a and 1b are joined by fastening the retaining screw 13c. Therefore, the number of parts of the product can be suppressed and the number of assembling steps can be reduced.

(Modification 1)
7 and 8, the above-described handle cover 3 is exposed without the outline of the hard layer 16 being covered with the soft layer 19, but, for example, like the handle cover 3A shown in FIGS. 9 and 10 The contour portion of the hard layer 16A may be covered with the soft layer 19A. The handle cover 3A is superior to the handle cover 3 in the effect of preventing peeling between the hard layer 16A and the soft layer 19A.

(Modification 2)
Further, in the handle cover 3 described above, only the outer surface of the hard layer 16 is covered with the soft layer 19 as shown in FIG. 8, but the inner surface and the outer surface of the hard layer 16 may be covered with the soft layer 19. . Furthermore, for example, like the handle cover 3B shown in FIG. 11, the hard layer 16B may be formed in a skeleton shape and may be included in the soft layer 19B. The hard layer 16B is formed in a lattice shape, for example, as shown in FIG.

  As described above, when the soft layer 19 of the handle cover 3 is soft and thick, the cushioning effect is improved, but the user's finger and palm are greatly sunk as shown in FIG. On the other hand, when the soft layer 19B of the handle cover 3B is soft and thick, the cushioning effect is improved, and as shown in FIG. 15, the sinking of the user's finger or palm causes the outer surface of the hard layer 16B of the soft layer 19B to be depressed. It is suppressed according to the thickness of the portion to be coated. Therefore, the handle cover 3 </ b> B has better operability than the handle cover 3.

  Furthermore, the handle cover 3B is excellent in the effect of preventing the hard layer 16B and the soft layer 19B from being separated as compared with the handle cover 3 because the lattice-like hard layer 16B is included in the soft layer 19B.

  According to the handle cover 3, the air gap 25 (FIG. 5) is formed between the hard layer 16 and the housing 1, so that elastic deformation of the hard layer 16 is allowed. On the other hand, according to the handle cover in which the inner surface of the hard layer is covered with the soft layer like the handle cover 3B, for example, the soft layer is disposed between the hard layer and the housing, so that the hard layer is elastically deformed. Permissible. For this reason, it is not always necessary to form a gap between the housing and the housing in order to obtain a buffering effect by elastic deformation of the hard layer.

(Modification 3)
The handle cover 3B shown in FIG. 11 is composed of the hard layer 16B that has been removed in a lattice shape shown in FIG. 12, but may be composed of, for example, the hard layer 16C that has been removed in a circular shape as shown in FIG. Is optional. In any of the above-described embodiments, the buffer effect and operability of the handle cover can be set for each part by arbitrarily designing the shape and material of the hard layer and the soft layer.

  In addition, this invention is not limited to the above-mentioned embodiment, What changed variously in the range described in the claim is also contained in the technical scope of this invention.

  For example, the present invention is not limited to an impact driver, and can be widely applied to portable tools such as a driver drill and an impact wrench as long as it has a substantially columnar handle. Furthermore, the present invention is not limited to an electric tool using a secondary battery as a power source, and can be widely applied to, for example, an electric tool using an AC power source as a power source, an air tool using compressed air as a power source, and the like.

  In addition, the handle cover 3 shown in the embodiment and the handle covers 3A and 3B shown in the modified examples are all configured to completely cover the outer peripheral surface of the handle portion 52. The cover is not limited to these configurations, and if the cover covers at least a part of the handle part and is integrally formed in a substantially cylindrical shape, for example, it is formed in a spiral shape or a lattice shape, and a part of the handle part is exposed. It may be formed as follows.

  Further, in the impact driver 100, the retaining member 24 that prevents the handle cover 3 from being detached from the handle portion 52 is formed in the battery holder 2, but the retaining member of the present invention is not limited to the above-described configuration. If it is formed so as to contact the end of the handle cover integrally formed in a substantially cylindrical shape, for example, it is formed on a hook for holding a portable tool on a waist belt or the like, a housing for accommodating a substrate, etc. Or may be formed as an independent part separate from other configurations.

  In addition, if it aims at providing the portable tool provided with the housing shared by the product from which a specification differs, it is not necessarily required to provide the handle | steering-wheel cover integrally formed in the substantially cylindrical shape.

  In addition, the material, shape, quantity, arrangement, and the like of each component can be changed as appropriate within a range in which the object of the present invention can be achieved.

DESCRIPTION OF SYMBOLS 1 Housing 1a, 1b Housing 2 Battery holder 2a, 2b Battery holder housing 3, 3A-3C Handle cover 4 Hammer case 5 Battery pack 6 Switch unit 6a Trigger switch 7 Forward / reverse switching lever 8 Cooling fan 9 Motor 10 Control board 11 Control board 12 Battery connection terminals 13a to 13c Fastening screw 14 Connection cord 16, 16A to C Hard layer 19, 19A to C Soft layer 20 Tip tool holding portion 21 Cord insertion hole 22 Cord insertion hole 23 Abutting surface 24 Retaining member 25 Cavity 26 Region 27 Region 28 Fitting groove 29 Fixing member 31, 31A to C Grip portion 31a Through hole 32, 32A to C Holding portion 33, 33A to C Finger rest portion 50 Main body portion 51 Motor housing portion 52 Handle portion 100 Impact driver

Claims (6)

A spindle for holding the tool;
A motor for rotating the spindle;
A housing composed of a motor housing portion that houses the motor, and a handle portion that protrudes from the motor housing portion into a substantially columnar shape;
A handle cover covering the peripheral surface of the handle portion;
A retaining member provided at an end of the handle portion, contacting the end surface of the handle cover and preventing the handle cover from being detached from the handle portion ;
The handle cover is integrally formed in a substantially cylindrical shape,
A portable tool characterized by that. The handle cover is a laminate of a hard material and a soft material.
The portable tool according to claim 1. A gap that allows elastic deformation of the handle cover is formed between the handle cover and the handle portion.
The portable tool according to claim 1 or 2, wherein the portable tool is used. The retaining member holds a secondary battery that supplies power to the motor.
The portable tool according to any one of claims 1 to 3, wherein the portable tool is provided. The retaining member is detachably provided on the handle portion.
The portable tool according to claim 4 . The housing is composed of a pair of split housings joined by screw members,
The retaining member is fixed to the housing by at least one screw member;
The portable tool according to claim 5 .

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