NL1023826C2 - Hand tool, e.g. saw or hammer, is adapted to ergonomics and motor and physical capabilities of children - Google Patents

Abstract

The tool is adapted to the ergonomics and the motor and physical capabilities of a child. This is achieved by providing a relatively large handle (2), preferably with a relatively large grip for at least three fingers, especially a pistol grip. For a hammer (1), the handle contains depressions (3) for each of the fingers. For a screwdriver, a T-shaped handle is provided. For a power drill, two large handles are provided on either side of the motor casing and locking and operating buttons are incorporated into the handles in such a way that they can not be operated separately. For a hand saw, a pistol grip is provided. For a saw guide, a saw clamp is provided comprising at least two clamping plates for the saw, a base plate and at least one bracket for protecting the hand and the thumb of the idle hand extending approximately perpendicular to the base plate. For a fret saw, the bracket has a bend in it so that the child's arm is kept free. For a pair of pliers, large handles are provided, the maximum distance between the jaws is kept narrow and the mouth is relatively wide compared to the shaft. For a grinding block, a triangular bracket is provided and a handle is mounted on the inside of the long side of the triangle.

Description

-2- safety is guaranteed. The present invention therefore provides hand tools suitable for children adapted to their ergonomics, motor skills and physical capabilities, while safety when used by children is of course paramount. In the current application, children are those who are approximately 6-14 years old.

In particular, the invention provides hand tools with a relatively large handle, wherein handle represents that portion with which the tool is operated. Relatively large stands for approximately 1.2 to 3 times the size of the handle in relation to the handle compared to adult hand tools with a handle of a length of approximately 7 to 15 cm and a handle of approximately 25 to 35 cm, as available in regular trade. If there is no separate handle, then handle should be understood as the part that is operated by hand, such as the handle of a bahco. The handle of a bahco according to the invention is about 1.5 to 3 times larger than the mouth compared to the same ratio in adult hand tools with a handle of about 20-30 cm and a mouth of about. 5 - 10 cm.

Preferably a relatively large grip is located in the handle. In the present application, relatively large grip is understood to be a grip that is relatively firm and is adapted to the length and width of the hand and the thickness of the fingers of the child. Preferably, the handle comprises grip for at least four fingers. More preferably, the grip comprises three turns in the handle, each turn being intended for a total of three fingers, and the handle of the hand tool according to the invention comprises at least one opening intended to pierce one finger. Such an opening is, for example, in the form of a ring, but this is not critical as long as only one finger fits through it. When a finger such as an index finger is placed through the opening, it can give direction to the machining with the hand tool. More preferably, the handle comprises a gun handle.

According to a particularly preferred embodiment of the invention, the hand tool comprises a hammer, the handle of which is shielded from the handle by a thickening between handle 30 and handle. A hammer with such a shape encourages children to use it properly and in particular keeps them from holding a hammer just below the head. More preferably, the weight of the hammer as commercially available is approximately proportional to that of an average adult to that of a child. Also the ratio of the size of the handle of the hammer according to the invention to that of a typical hammer is preferably in accordance with the ratio of the size of the forearm of an adult to that of a child. Furthermore, the head of the hammer in relation to the handle of the hammer preferably comprises a large face, namely a diameter of the face that is about 3 to 6 times larger than the diameter of the face of about 1 to 2.5 cm of hammers that are available in regular trade. With this last characteristic 10, the chance of being hit naturally increases.

According to a further particular preferred embodiment of the invention, the hand tool comprises a screwdriver with a handle in a T-shape.

The end of the screwdriver is preferably provided with a bit holder.

The end or screw part of the screwdriver is also provided with a sleeve which is slidable by means of a spring, which sleeve falls around the screw during use of the screwdriver in order to prevent slipping. By bits is meant the screw adapter pieces that are available in regular trade, whereby different screw shapes are possible with one bit holder, such as a crosshead, Philips, flat etc.

The invention further provides as a hand tool a drilling machine with two handles on either side of the motor housing. The lock button and control button, preferably incorporated in the handles, cannot be used separately to further increase safety. The use of two handles on both sides also ensures a better balance, making it easier to direct and operate the tool. In order to increase the safety and to be able to drill straight, the drilling machine preferably also comprises, in addition to the drill part, an additional pin as drill guide with a shield, in particular V-shaped, of rod-shaped material arranged around the drill bit substantially perpendicular to the end thereof. away. More preferably, the speed of the drilling machine is limited.

The above-mentioned hand tool according to the invention comprising a hammer and screwdriver preferably also comprises a nail and screw holder comprising a slat with a hole, so that the nail to be applied with the hammer 1023826 # BNSDOCID: <NL 1023826C2 I> -4 - or the screw to be screwed in with the screwdriver. The raised edge is generally arranged at an angle of approximately 90 ± 30 °. When using such a child-friendly hammer and screwdriver in combination with the above-mentioned holder which gives direction to the nail and screw, the raised edge protects the hand that does not serve.

A further preferred embodiment according to the invention comprises a hand saw in which the saw is provided with a gun handle. With the aid of such a modified gun handle, the tension can be removed from the hand in a simple yet effective manner and the direction can be given to the saw. The invention also provides hand tools comprising a saw guide comprising a saw clamp at least consisting of two plates intended to clamp a saw at least during use, and a base plate therein more or less perpendicular to which at least one protective bracket for hand and thumb of the non-operating hand are provided. The saw guide preferably comprises a protractor which is arranged between saw clamp and base plate 15. The base plate includes one or more hand and finger protective brackets, generally thumb of the non-operating hand as well as an approximately 90 * limit which falls over the edge of the surface to be cut. The protractor is preferably arranged at the point where the saw clamp and base plate are attached to each other by means of a rotary knob. This pivot point can be adjusted such that this accessory 20 can also serve as a protractor. To make this accessory available for both left and right-handed people, the saw clamp can be placed on both sides of the base plate. Preferably, the hand tool comprising a saw according to the invention is supported and guided by such a saw guide according to the invention.

The invention further provides hand tools according to the invention comprising a fretsaw provided with such a bend in the bracket that the child's arm remains free when the fretsaw is used. Preferably, an additional bend is provided in the bracket in such a way that the bracket passes over the arm, so that during use the saw becomes straight instead of skewed on the material being processed. Furthermore, a ring is preferably provided on the handle to remove the tension 1023826 "from the hand, to give direction to the saw and to keep the hand away from the saw surface.

The invention also offers as a special embodiment a bahco with extra long handle to increase the momentum and to make use of a greater leverage action. The invention also comprises a pair of pliers with relatively large handles with preferably flanges in the casing thereof, the reach of the legs being relatively narrow so that the child can operate the pliers with one hand. Furthermore, the tongs according to the invention preferably have a relatively wide jaw to increase the grip, and in particular relatively long arms that promote safe use and serve to be able to put extra force through the lever effect. Relatively narrow reach of the arms is to be understood to mean a reach of about 0.5 to 0.75 times the size in comparison with a pair of pliers for adults, such as are available at regular retailers. A relatively wide jaw is understood to mean a jaw with a width of about 1.2 to 2 times that of a pair of tongs for adults, such as is available at regular retailers.

According to a further special embodiment, hand tools are provided comprising a sanding block with a handle in a triangular form, the corners of which may be rounded off, with preferably angles for the grip being provided on the inside of the long side. Preferably, the handle comprises fingers 20 for grip. The position of the handle must be such that the force is distributed over the entire sanding surface in the longitudinal direction.

According to another special embodiment, a hand tool is provided comprising a glue clamp with a relatively large, preferably hinged handle, which causes a leverage effect making it usable for children.

Furthermore, the invention provides a method for developing hand tools suitable and safe for children, as described above, wherein existing hand tools are adapted to the ergonomics, motor skills and physical capabilities of children.

In addition, the invention provides a method for guiding the use of hand tools suitable and safe for children such as 1023826. BNSDOCID: <NL 1023826C2 I>. -6- described, whereby a preferably interactive computer program that supports the use of this hand tool for children is applied. It should be clear that proper supervision of the use of hand tools by children is essential. A tool such as an interactive computer program is excellent for this. The operation and operation can be explained and presented, drawings offered by the program can be printed, cut out, applied to wood or other material, sawn out, assembled and painted.

Different computer programs can be used for different target groups, such as school, after-school care, hobby, orthopedagogics, activity counseling and therapeutic purposes. The computer can possibly be used as a coach for the teacher or supervisor.

In the current application, children are understood to mean those who are approximately 6-14 years old. In the period of 6 to 12 years, acquired motor skills are increasingly refined: the development of fine motor skills and the coordination between eye and hand. The large handle with firm grip is therefore geared to the control of the gross motor skills of children from 6 years. The size of the handles is adjusted to the relatively large hands with long fingers. The large hammer's stroke and the wide jaw of the pliers and bahco are geared to eye hand coordination to provide control of the operation and control of the tool. The motor development of the child is completed around 12 * years.

In the period of 6 to 12 years, a child grows on average five centimeters per year, the limbs being large and long in relation to the body. It is only at puberty that a child also grows in width so that the relationships become more balanced, as well as the associated development of muscle strength and body weight. Both with hammer, bahco and tongs, handle and arms are extended to create a leverage function, so the child needs less force to operate the tool.

With the sanding block and the drilling machine, its weight is adjusted to the child's muscle strength and body weight.

In principle, the tool according to the invention is preferably specifically suitable for children from certain age groups such as, for example, from 6 to 8 years, T023826, 9 to 11 years and 12 to 14 years, the proportions are adjusted to the average sizes of the children from those age groups.

The material from which the hand tool suitable for children according to the invention is made is generally the same as the material of the high-quality, professional corresponding hand tool as commercially available. If possible, however, soft material such as soft or hard plastic is preferably used for those parts that come into contact with the body, such as for example the handles. Also, if possible, that is without prejudice to the function of the hand tool, the sharp corners are rounded and colors and design are attractive to children.

The present invention will be further elucidated hereinbelow on the basis of the enclosed figures of a preferred embodiment, in which: figure 1: front view of hammer (1) whose handle (2) with slopes (3) by means of a thickening (4) between handle (2) and handle (5) is shielded from the handle, with relatively large face (6) figure 2: front view of screwdriver (7) with a handle (2) in a T-shape and a screw guide around the bit holder (8) at the end of the shank of the screwdriver figure 3: front view of drilling machine (9) with two handles (2) in which control knob and safety knob, with turns and extra pin (10) with a V-shaped shield at the end (11) around the drill bit (12) figure 4: front view of nail or screw holder (13), comprising a slat (14) with hole (15) into which the nail or screw to be fitted fits and is guided, with an upright edge ( 16) To protect the hand that it acces soire holds T0238261 BNSDOCID: <NL 1023826C2 I> -8- figure 5: front view of a saw (17) with a handgrip handle containing the handle (2), knurls (3) and a ring (18) to put one finger through it figure 6 : front view of a hacksaw (19) with handgrip handle containing handle 5 (2), turns (3) and a ring (18) for piercing one finger Fig. 7: front view of a saw guide (20) provided with a saw clamp (21) and a base plate (22) provided with a hand bracket (20) and finger openings (18), a rotary knob with protractor (24) and boundary on the rear of the base plate (25) figure 8: front view of jigsaw (26) with handle ( 2), curves (3) and a ring (18) for piercing one finger, as well as a bend (27) in the bracket Figure 9: front view of bahco (28) with relatively wide jaw (29) and long handle (5) Figure 10: front view of combination pliers (30) with handles (2) and slopes (3) figure 11: front view of sanding block k (31) with handle (2) in a triangular shape, with angles (3) for the grip on the inside of the long side 20 figure 12: front view of glue clamp (32) with a large hinged handle (2).

The figures are otherwise schematic and not drawn to scale. In particular, for the sake of clarity, some dimensions may be exaggerated to a greater or lesser extent. Corresponding parts are designated in the figure as far as possible with the same reference numeral.

The hammer as shown in figure 1 serves to illustrate a child-friendly, safe hammer with an easy-to-grip handle (2) with grip in the form of turns (3) for the fingers. The thickening (4) between the handle and the handle (5) offers extra protection for the operating hand. The relatively large face T0Ü3826 · -9- (6) increases the functionality specifically for children, namely the chance of hitting the object being processed with the hammer.

The T-shaped handle (2) of the screwdriver according to the invention as shown in figure 2 makes it possible for children to apply force to it so that it is actually possible for them to turn screws into an object with it.

Figure 3 shows a drilling machine (9) with two large handles (2) with grip in the form of turns (3) for the fingers on either side of the handle. An additional pin (10) is arranged next to the drill part, with a V-shaped shield of rod-shaped material (11) substantially perpendicular to its end around the drill bit (12), which drill bit is preferably perpendicular to the surface to be drilled during use. will be placed. This shield serves to guide the drill bit to the place where drilling is to be carried out and to protect against injury from both the person operating and another person.

Figure 4 shows a holder comprising a slat (14) with an upstanding edge (16) and a hole (15) for holding and directing a nail or screw. This holder is generally used in conjunction with the hammer or screwdriver described above. The raised edge serves to protect the operating hand and third parties.

Figures 5 and 6 show saws (17,19) with handles in the form of a large pistol handle (2) with grip in the form of turns (3) for the fingers and an opening (18) for passing a finger through stabbing. The application of one is even safer. saw guide (20) provided with a clamping part (21) where the saw (17) is inserted and a boundary (25) perpendicular to base plate (22) for grip on the saw surface and wherein the base plate is provided with a bracket (20) where the unseen hand underneath lies with a finger, generally the thumb, through the opening (18) next to it.

The fretsaw as shown in figure 8 has a handle (2) with grip in the form of turns (3) for the fingers and an opening (18) for piercing a finger. There is a bend in the bracket so that the operating arm is not hindered by the bracket.

Figure 9 shows a bahco with a wide jaw (29) for a better grip and a long handle (5). A bahco in general with such dimensions is better to handle for children than pliers commercially available. Because of the longer handle they can also exert more efficient force on it. Figure 10 shows a combination pliers (30) with relatively large handles (2) and angles (3) that provide a firm grip, the range of the long legs being narrow to be able to operate it with one hand and the jaw of the forceps are relatively long and wide to increase the grip and to be able to put extra force through the lever effect.

Figure 11 shows a sanding block (31) with handle (2) in a triangular shape, with angles (3) for the grip on the inside of the long side, whereby optimum use is made of the power of a child there 10 the force in the longitudinal direction is distributed.

A glue clamp (32) with a large hinged handle (2) that produces a lever effect that makes it suitable for children is shown in Figure 12.

It will be clear to those skilled in the art that the inventive idea of providing hand tools that are suitable and safe for children, without too much compromising on functionality, allows a wide application and is certainly not limited to the examples given for illustrative purposes. . A relatively large handle allowing the grip on. the hand tools are of great importance.

This also applies to guiding children with the use of such hand tools; developing and applying a preferably interactive computer program directed thereto is also part of the invention.

1023826 *

Claims (22)

1. Hand tools suitable and safe for children adapted to their ergonomics, motor skills and physical capabilities. 5 Hand tool according to claim 1 with a relatively large handle. Hand tool according to claim 2 with a relatively large grip in the handle. Hand tool according to claim 3, wherein the handle comprises grip for at least three fingers. Hand tool according to claim 3 or 4, wherein the grip is effected by turns in the handle, wherein each turn is intended for a finger. 15 Hand tool as claimed in one or more of the claims 3-5, wherein the handle comprises at least one opening intended to pierce one finger. The hand tool of claim 6 wherein the handle comprises a gun handle 20. 8. Hand tool according to one or more of claims 1-7, comprising a hammer, the handle of which is shielded from the handle by means of a thickening between handle and handle. 25 Hand tool according to claim 8, wherein the weight of the hammer is in proportion to that of the child, the handle is brought in proportion to the size of the child's forearm and the size of the face is relatively large. Hand tool according to one or more of claims 1 to 7, comprising a screwdriver with a handle in a T-shape. 1023826 · BNSDOCID: <NL 1023826C2 I> -12- Hand tool according to one or more of claims 1 to 7 or 10, comprising a screwdriver, the end of which is provided with a bit holder and with a sleeve sliding by means of a spring which falls around the screw during use of the screwdriver. 5 12. Hand tool as claimed in one or more of the claims 8-11, also comprising a nail and screw holder containing a slat with a hole, through which the nail to be applied with the aid of the hammer or the screw to be screwed in with the screwdriver fits. 10 Hand tool according to one or more of claims 1-7, comprising a drilling machine where two large handles are arranged on either side of the motor housing with a locking knob and operating knob incorporated in the handles, the operation of which is adjusted so that they cannot be used separately. 15 Hand tool according to claim 13, wherein the drill comprises, in addition to the drill portion, an additional pin as a drill guide with a screen of rod-shaped material arranged substantially perpendicular to the end thereof around the drill bit. 20. Hand tool as claimed in one or more of the claims 1-7, comprising a hand saw, wherein the saw is provided with a pistol grip. 16. Hand tool as claimed in one or more of the claims 1-7, comprising a saw guide comprising a saw clamp at least consisting of two plates intended to clamp a saw at least during use, and a base plate therein more or less perpendicularly to which at least one protective bracket for hand and thumb of the non-operating hand. 17. Hand tool as claimed in claim 16, wherein a protractor is arranged between saw clamp and base plate. 1023826 * -13- Hand tool as claimed in one or more of the claims 1-7, comprising a fretsaw provided with such a bend in the bracket that the child's arm remains free when the fretsaw is used. Hand tool according to one or more of claims 1 to 7, comprising a pair of pliers with large handles, the reach of the legs being narrow and the size of the jaw relatively wide with respect to the handle. 20. Hand tool as claimed in one or more of the claims 1-7, comprising a sanding block with a bracket with a triangle shape, the handle being arranged on the inside of the long side. 21. Method for developing hand tools suitable for children as defined in claims 1-20, wherein existing hand tools are adapted to the ergonomics, motor skills and physical possibilities of children. 22. Method for guiding the use of hand tools suitable for children as defined in claims 1 - 20, wherein a preferably interactive computer program that supports the use of the hand tools by children is applied. BNSDOCID: <NL 1023826C2 I>