ES2301332B1 - MANUAL TOOLS OF INTERCHANGEABLE HEADS. - Google Patents

Abstract

Manual tool handle with interchangeable heads, consisting of a tube (1) of cross section in a curved triangle with one of its vertices in a lower position delimited by curved-convex sides (2) linked by rounded edges (3); the tube (1) in its front mouth receives in its bosom a blocking body (4) of cross section equal to that of the tube (1) slidably adjusted, in addition to the channel (5) for the insertion of the flat rod (6) and with a smooth tail of the interchangeable head, on its upper face it has a blind vertical cavity (7) on its front wall it is communicated with the channel (5) where it plays with a vertical slide a locking piece, or sentence (8), mounted against a spring (9) that drives an upper position where a tooth (10) is housed through a window (11) of the flat rod (6) of the interchangeable head, whose sentence (8) is capable of adopting a lower position, against the spring (9), the tooth (10) being out of the stem window (6) and the sentence (8) facing an opening (12) of the tube (1). (See Figure)

Description

Hand tools head tool interchangeable

Field of the Invention

This invention concerns a handle that is specially designed to be interchangeably coupled to one or the other of a plurality of hand tool heads intended for various uses (DIY, gardening, ...).

Prior art

Various solutions are known in this field. that respond to the general concept of carrying a tubular handle (which constitutes the body of the handle itself), which by its front part internally incorporates means for the fast and practicable fixation of a flat smooth-shank stem (without thickness recesses on its upper and lower faces) that belongs to the interchangeable manual tool head. It is known that this flat stem has a through housing in which it penetrates a blocking element that can be removed at will by acting axially (in the radial or transverse direction of the handle tubular) on a button, when it is desired to change the one head for another, or just to keep the head in use once you have finished working with her.

Within this general constitutive concept are known particular executions in which the tubular handle is completely cylindrical, which, on the one hand, suffers lack of quality for an ergonomic grip; And on the other hand, enables a pernicious torsion effect of the tubular handle with respect to said internal fixing means Quick interchangeable head shank, which harms the effectiveness of your work and deteriorates the product so progressive, as the gaps and movements are increasing appeared between the tubular handle and its said internal means of quick fix

Any known attempt to avoid this effect of torsion has been to produce a crushing of the handle tubular on the front that houses the fixing means fast This has other new drawbacks: because the fixing means operate vertically (according to the gripping position when working with the tool), the crushing is done towards the horizontal, which means that the major axis of inertia it is horizontal and therefore in the most unfavorable position for resist a hammer-type use that tends to bend above said crushed front part.

Other attempts in the same direction have kept the cylindrical shape over the entire length of the tubular handle and have formed the crushed configuration into a beautifying element attached to the tip of this tubular handle. This solution assumes assign to the beautifier a mission that does not correspond to him and that it is not very effective, since this torsion effect gravitates now on the coupling of the bezel with the tubular handle, which, in short, means that the problem has been transferred from place but has not been resolved.

On the other hand, as for the means of quick fixation, various solutions are known with the particularity in all of them that the button is mounted forming part of the assembly that is inserted by one of the mouths of the handle tubular, which determines a minimum dimension of the section of this handle, which has a negative impact on the cost and the grip ergonomics. Solutions are also known in which the element that operates to retain the flat rod assembly is a kind of longitudinal strap or reed spring of remarkable length extending from near the tip of the handle tubular to the location of a button that is in position furthest from this tip of the tubular handle; this kind of solution calls into question the firmness and robustness of the fixation, and even its reliability over time, since the considerable length of the strap makes it prone to a loss of its characteristics elastic over time.

Explanation of the invention and advantages

Faced with this state of affairs, it is the object essential of this invention a handle for hand tools interchangeable heads that presents the peculiarity that It consists of a tube that in all its length has a section ergonomic grip cross section that is defined by a triangle curved that has one of its vertices in lower position and that is delimited by curved-convex sides that are linked by rounded edges, whose tube in its front mouth receives in its breast a blocking body that its cross section it is the same as that of said tube and is slidably adjusted with respect to the interior thereof, and whose tube, in addition to the channel for the insertion of the flat stem and smooth tail of the head interchangeable, on its upper face it has a vertical cavity blind that in its front wall is communicated with said channel of insertion and in which a piece of blockage, or condemnation, that is mounted against a spring that drives a superior position of the same in which an own tooth is housed through a window of said flat head shank interchangeable, whose sentence is capable of adopting a position lower, against said spring, in which said tooth is outside said flat stem window, and whose sentence remains superiorly facing an opening of said tube through which, with sliding peripheral adjustment, a button with coupling means that, without interposition of any elastic means, operate in conjunction with others existing on the upper face of said conviction and with the possible concurrence of the wall itself tube top. This contested constitution offers a hold of ergonomic quality far superior to that of a cylindrical handle, since which, on the one hand, is better suited to the shape of a clenched fist and, on the other hand, its polygonal contour favors a more grasped firm and secure that prevents the handle from turning inside the fist, when contrary to what happens with the grip of a cylindrical handle; all this favors a comfortable and efficient use of the tool, by time that decreases the possibility of blistering in the skin motivated by erosion. Also, this section form transversal offers the most favorable axis of inertia for those tool uses as if it were a hammer.

The present invention advocates two variants of execution of the coupling means of the button. A solution Preferred is one in which the button is provided with a rear leg and a front leg, so that the rear leg it forms a back nail that by elastic jump is susceptible to overcoming the rear edge of said tube opening and hooking under a counter-nail that is formed on the face superior of said sentence, while the front leg forms a front flange that is seated on a step that is lowered on the leading edge of the upper face of this sentence so that the vertical wall of this step is attached to the rear side of said front leg of the button. This solution makes it possible for the button to be mounted from outside the tube  once the locking body has been inserted into it until occupy its operational position; as you can clearly see in the graphic representation attached, this is achieved by a simple maneuver consisting of introducing the front leg between the condemnation and the tube wall, and then, with a simple twist, produce an elastic jump that ends up placing the nail of the leg back of the button hooked under the counter-nail of the sentence. This solution is ideal when it is interesting to establish a finer handle, since the inside measurement of the tube is not subject to the button being installed inside this tube together with the locking body.

The other variant of execution of the means of button coupling consist of its front walls and rear at its lower end bends to form two fins, front and rear, which are equal to each other and remain seated on a completely flat upper face of said sentence. This form of execution requires that the button be placed inside the tube together with the locking body, having this button a very simple configuration.

On the other hand, this invention comprises the particularity that, in relation to the position of the stem coupled to the handle, in the part of this flat rod adjacent to the front of the locking body inserted in the tube, there is a trim that has the same cross-sectional shape as said tube and locking body. This solution offers the advantage of intuitively indicate to the user what the correct position is for insert the tool head stem into the tube.

These and other features of the invention are illustrated by the attached graphic representation of a preferred mode of execution, including possible variants.

Drawings and references

To better understand the nature of the invention, in the attached drawings we represent an embodiment industrial that has illustrative example and not limitative.

Figure 1 is an exploded view in perspective illustrating a handle that is constituted according to the invention. It includes an expanded detail that shows the shape of the cross section of the tube (1) of the handle, coinciding with the shape of the cross section of the body of lock (4); as well as an expanded detail of a preferred variant of execution of the blocking means of the flat stem (6).

Figure 2 is the longitudinal middle section indicated with II-II in figure 3 and corresponding for the purpose of the invention according to the embodiment variant shown in figure 1.

Figure 3 is the top plan view corresponding to figure 2.

Figure 4 is an enlargement of detail IV that It is indicated in Figure 2, which in turn incorporates both extended details referring to the rear (14) and front legs (15) of the button (13).

Figure 5 is an enlargement of the section V-V indicated in figure 2.

Figure 6 is an exploded view in perspective that is similar to figure 1, but referred to another way of execution of the flat rod locking means (6).

Figures 7 and 8 are similar to Figures 2 and 3 but referred to the execution variant illustrated in the figure 6.

Figure 9 is an enlargement of the section IX-IX indicated in Figure 7.

In these figures the following are indicated references:

one.-

Tube

2.-

Curved-convex tube sides (one)

3.-

Rounded tube edges (1)

4.-

Lock body

5.-

Locking body channel (4)

6.-

Flat shank and flat head shank interchangeable

7.-

Vertical blind cavity in locking body (4)

8.-

Condemnation or lock piece

9.-

Spring

10.-

Condemnation tooth (8)

eleven.-

Flat Stem Window (6)

12.-

Tube opening (1)

13.-

Push button (13)

14.-

Rear button leg (13)

fifteen.-

Front button leg (13)

16.-

Rear leg rear nail (14)

17.-

Counter-nail conviction (8)

18.-

Front leg front tab (15)

19.-

Front step on upper face of conviction (8)

twenty.-

Push button front flap (13)

twenty-one.-

Rear button fin (13)

22.-

Stem Hole (6)

2. 3.-

Tooth front bezel (10)

24.-

Front peripheral locking body lock (4)

25.-

Lock body drill (4)

26.-

Fixative

27.-

Tube hole (1)

28.-

Beautifier

29.-

Gasket joint

Exhibition of a preferred embodiment

Regarding the drawings and references above listed, an execution mode is illustrated in the attached drawings Preferred object of the invention, which concerns a handle of interchangeable head hand tools.

As illustrated in figure 1, this handle recommended consists of a tube (1) that in all its length presents an ergonomic grip cross section that is defined by a curved triangle that has one of its vertices in position bottom and that is delimited by sides curved-convex (2) that are linked by edges rounded (3), whose tube (1) in its front mouth receives in its sin a blocking body (4) that its cross section is equal that of said tube (1) and is slidably adjusted with respect to inside it, and whose tube (1), in addition to the channel (5) for the insertion of the flat stem (6) and smooth tail of the head interchangeable, on its upper face it has a vertical cavity blind (7) that on its front wall is connected to said channel (5) insertion and in which you play with vertical sliding a locking piece, or sentence (8), which is mounted against a spring (9) that drives a higher position thereof in which a own tooth (10) is housed through a window (11) of said flat shank (6) of the interchangeable head, whose condemnation (8) is able to adopt a lower position, against said spring (9), wherein said tooth (10) is out of said flat stem window (6), and whose sentence (8) remains superiorly facing an opening (12) of said tube (1) by which, with sliding peripheral adjustment, shows a button (13) provided with coupling means that, without interposition of means elastic some, operate in conjunction with others existing in the upper face of said sentence (8) and with the possible concurrence from the upper tube wall itself (1). The simple vision of this cross-sectional shape of the tube (1) shows its advantages Ergonomic properties versus executions in which you opt for a completely cylindrical shape; also, as before outlined, this solution offers the most favorable axis of inertia of face to a use of the tool in action of hammer type. Other Outstanding quality of this proposed solution is the great firmness, robustness and reliability of flat rod locking (6), compared to known solutions based on strapping.

In relation to this section form Transversal proposed by this invention, it is planned that, with relation to the position of the rod (6) coupled to the handle, in the part of this flat rod (6) adjacent to the front of the body of block (4) inserted in the tube (1), there is a trim (28) that it has the same cross-sectional shape as said tube (1) and locking body (4). This solution makes it easy for the user to intuitive way the knowledge of what is the correct position in the flat rod (6) of the interchangeable head must be inserted of the tool.

Figures 1 to 5 illustrate a variant of execution referred to the coupling means of the button (13). It consists in that this button (13) is provided with a leg rear (14) and a front leg (15), so that the rear leg (14) forms a rear nail (16) which by elastic jump is liable to exceed the rear edge of said opening (12) of the tube (1) and hook under a counter-nail (17) which is formed on the upper face of said sentence (8), at time that the front leg (15) forms a front flange (18) which is seated on a step (19) that is lowered at the edge front of the upper face of this sentence (8) so that the vertical wall of this step (19) is attached to the side rear of said front leg (15) of the button (13). Watching Figure 4 clearly understands the maneuver necessary to install the button (13) from the outside of the tube (1), being the locking body (4) placed in its operative position that show figure 2 and figure 4 itself; for it: with the inclined button, the front flange (18) of the front leg (15) is introduced under the upper wall of the tube (1) at the edge opening front (12); then pivoting on the own front flange (18), there is a turn of dejection of the button (13) in which, by elastic jump, the rear leg (14) ends with its back nail (16) hooked on the counter-nail (17), at the same time as the leg front (15) ends up seated on the step (19). As it was reviewed before, with this solution the thickness of the tube (1) is not conditioned the button must be inserted through one of the mouths of the tube (1) together with the rest of the coupling means, so this thickness can be reduced and offer an application advantage in those cases in which a finer handle is of interest than what can achieved by other means.

Another execution variant is the one that is illustrated by figures 6 to 9, wherein said coupling means of the button (13) consist of its front and rear walls at their lower end they bend to form two fins, front (20) and rear (21), which are equal to each other and that they are seated on a completely flat upper face of said conviction (8). In this case the button is mounted with the rest of the coupling means before being the set introduced into the breast of the tube (1); the push button configuration (13) is the most simple, with two legs (20, 21) equal to each other and that simply they rest on a flat upper face of the sentence (8).

According to a preferred mode of execution of this invention, said tooth (10) of the sentence (8) has a cylindrical contour that, with lace adjustment, operates with respect to a hole (22) of said flat rod (6), relative to the operative position of coupling of this flat rod (6) in the locking body (4), whose cylindrical contour has a bevel front (23) facing the rear mouth of said channel (5) of this locking body (4). In the non-operational state of the handle the sentence (8) occupies its superior position driven by the spring (9) and in which the front bezel (23) faces the channel (5); by inserting the flat rod (6) through this channel (5) falls on the front bezel (23) driving the descent of the conviction (8) against the spring (9); as for the flat stem (6) reaches its final position the tooth (10) penetrates the hole (22)  by spring elastic recovery (5), and is established the blocking of the flat rod (6) inside the tube (1). It does note that this hole (22) is functionally identical to the window (11) referred to above; the reason for assigning different numerical references is that window (11) collects a concept general that is independent of its concrete form (it is not forced its shape to be cylindrical), while the hole (22) specify a specific shape, the cylindrical.

To limit the penetration of the body of lock (4) on the tube (1), this lock body (4) on its forehead it is extended peripherally by means of a shoulder (24), as see in figures 1 and 6.

To fix the locking body (4) in relation to the tube (1), this locking body (4) has a hole (25) in the which is likely to receive a fixative (26) established through of a hole (27) made in the wall of the tube (1), as appreciate in figures 2 and 4.

Claims (7)

1. Hand tool of interchangeable head tools, characterized in that it consists of a tube (1) that has an ergonomic grip cross section throughout its length, which is defined by a curved triangle that has one of its vertices in a lower position and is delimited by curved-convex sides (2) that are linked by rounded edges (3), whose tube (1) in its front mouth receives in its bosom a blocking body (4) whose cross section is the same as that of said tube (1) and is slidably adjusted with respect to the interior thereof, and whose tube (1), in addition to the channel (5) for the insertion of the flat rod (6) and smooth tail of the interchangeable head, on its upper face has a blind vertical cavity (7) that on its front wall is communicated with said insertion channel (5) and in which it plays with vertical sliding a locking piece, or condemnation (8), which is mounted against a spring (9) that drives a super position rior of the same in which an own tooth (10) is housed through a window (11) of said flat rod (6) of the interchangeable head, whose sentence (8) is capable of adopting a lower position, against of said spring (9), in which said tooth (10) is outside said window of the flat rod (6), and whose sentence (8) is superiorly facing an opening (12) of said tube (1) by the which, with sliding peripheral adjustment, shows a button (13) provided with coupling means that, without interposition of any elastic means, operate in conjunction with others existing on the upper face of said sentence (8) and with the eventual concurrence of the own upper wall of the tube (1). 2. Hand tool of interchangeable head tools, according to the first claim, characterized in that said push-button coupling means (13) consists in that it is provided with a rear leg (14) and a front leg (15), so that the rear leg (14) forms a rear nail (16) which by elastic jump is capable of exceeding the rear edge of said opening (12) of the tube (1) and engaging under a counter-nail (17) which is formed in the upper face of said condemnation (8), while the front leg (15) forms a front flange (18) that is seated on a step (19) that is lowered on the leading edge of the upper face of this condemnation ( 8) so that the vertical wall of this step (19) is attached to the rear side of said front leg (15) of the button (13). 3. Hand tool of interchangeable head tools, according to the first claim, characterized in that said push-button coupling means (13) consist in that its front and rear walls at its lower end are bent to form front, front wings (20) ) and rear (21), which are equal to each other and that are seated on a completely flat upper face of said sentence (8). 4. Hand tool of interchangeable head tools, according to the first claim, characterized in that said tooth (10) of the sentence (8) has a cylindrical contour that, with fit adjustment, operates with respect to a hole (22) of said flat rod (6), in relation to the operative position of coupling of this flat rod (6) in the locking body (4), whose cylindrical contour has a front bezel (23) facing the rear mouth of said channel (5) of this locking body (4). 5. Hand tool handle with interchangeable heads, according to the preceding claims, characterized in that said locking body (4) in its front is extended peripherally by means of a shoulder (24). 6. Hand tool handle with interchangeable heads, according to the preceding claims, characterized in that said locking body (4) has a bore (25) in which it is capable of receiving a fixator (26) established through a hole (27) practiced on the tube wall (1). 7. Hand tool handle with interchangeable heads, according to the preceding claims, characterized in that, in relation to the position of the rod (6) coupled to the handle, in the part of this flat rod (6) adjacent to the front of the body of blocking (4) inserted in the tube (1), there is a trim (28) that has the same cross-sectional shape as said tube (1) and blocking body (4).