TWI448236B - Supporting mechanism and electronic device using the same - Google Patents

Description

Support mechanism and electronic device using the same

The present invention relates to a support mechanism and an electronic device using the same.

In general, electronic devices such as liquid crystal display units are often provided with a supporting mechanism, which is convenient for the user to adjust the height and pitch angle of the screen according to personal preference.

A support mechanism for a liquid crystal display unit includes a sliding slot unit, a sliding unit that can slide relative to the sliding slot unit, and a spring piece fixed on the sliding slot unit. The sliding unit defines an inverted V-shaped receiving space, and the elastic piece has a substantially inverted V shape. The elastic piece is clamped from both sides by the two side walls of the inverted V-shaped accommodating space, and the angle between the two elastic legs of the elastic piece is clamped and narrowed, and the two elastic legs have a tendency to open.

In the supporting mechanism, the sliding unit clamps two elastic legs of the elastic piece from two sides, and the two elastic feet apply an elastic abutting force to the sliding unit, so that the sliding unit and the chute unit have a large friction force to ensure sliding. The unit can slide relative to the chute unit and stay at any height. The range of the angle between the two elastic legs of the elastic piece determines the movement stroke of the sliding unit relative to the chute unit, so the elastic piece functions both to elastically resist and to limit the movement stroke. However, since the weight of the entire display unit and the sliding unit are applied to the elastic piece, the strength of the elastic piece is required to be high, and fatigue is more likely to occur after repeated use. When the elastic legs of the elastic piece are opened and closed for a plurality of times to generate fatigue, the range of the angle between the two elastic feet can be reduced, resulting in the movement of the sliding unit relative to the chute unit. The moving stroke is shortened, and the height adjustment of the liquid crystal display unit is not in place.

In view of the above, it is necessary to provide a support mechanism that can still be adjusted in place after a plurality of uses.

A support mechanism includes a support base, an elastic member, a sliding member disposed on the support base, and a link assembly disposed on the support base, the link assembly including a first link pivotally connected to the support base and a second connecting rod pivotally connected to the third connecting rod of the first connecting rod and the fourth connecting rod pivoted to the second connecting rod, wherein the third connecting rod is pivotally connected with the fourth connecting rod, and one end of the elastic member is connected to the supporting base. The other end is connected to one end of the third connecting rod and the fourth connecting rod. The sliding assembly comprises a sliding member and a resisting portion protruding from the sliding member, and the sliding member slides against the supporting seat to resist Abutting against the first connecting rod and the second connecting rod, when the sliding member slides relative to the supporting seat, the abutting portion abuts the connecting rod assembly to rotate the connecting rods of the connecting rod assembly and deform the elastic member, The restoring force of the elastic member is transmitted to the link assembly and the first link and the second link are abutted against the abutting portion.

Another supporting mechanism includes a supporting base, an elastic member and a sliding member and a connecting rod assembly slidably disposed on the supporting base. The connecting rod assembly is pivotally connected to the supporting base and includes a first connecting rod and a second pivoting connection with each other. a connecting rod, one end of the elastic member is connected to one end of the first connecting rod and the second connecting rod, and the other end is connected to the supporting base, the limiting seat is provided with a limiting portion, the first connecting rod and the second connecting rod The other end slides along the limiting portion, and the sliding member is applied with different resisting force to the connecting rod assembly, so that the plurality of connecting rods of the connecting rod assembly rotate relative to each other, and the elastic member is deformed to provide different degrees of deformation to provide The varying spring force, the restoring force of the elastic member is transmitted to the link assembly and the link assembly is abutted against the slider.

An electronic device comprising a display unit and a supporting mechanism supporting the display unit, the branch The support mechanism comprises a support base, an elastic member, a sliding component disposed on the support base and a link assembly disposed on the support base, the link assembly comprising a first link and a second connection pivotally connected to the support base a rod, a third link pivotally connected to the first link and a fourth link pivotally connected to the second link, the third link is pivotally connected to the fourth link, and one end of the elastic member is connected to the support base, and the other end is connected Connected to one end of the third connecting rod and the fourth connecting rod, the sliding assembly comprises a sliding member and a pulley disposed on the sliding member, resisting the first connecting rod and the second connecting rod, when the sliding member is opposite When the support seat slides, the pulley abuts against the link assembly, so that the links of the link assembly rotate relative to each other and deform the elastic member, and the restoring force of the elastic member is transmitted to the link assembly and the first link and the second link are The connecting rod is in contact with the pulley.

In the supporting mechanism of the electronic device, an elastic restoring force is generated after the elastic member is deformed, and the elastic restoring force of the elastic member is converted into a resisting force of the connecting rod assembly to the sliding member, and the adjusting stroke of the supporting mechanism is composed of the sliding member and the supporting seat. The length of the matching determines that the elastic member only serves to provide the elastic force, and does not limit the position as a functional limiting component. Therefore, after a plurality of uses, the adjustment stroke of the supporting mechanism can still be ensured. Moreover, the gravity of the display unit and the sliding member is transmitted to the elastic member via the connecting rod assembly, and the force of the elastic member is relatively reduced, and fatigue damage is less likely to occur.

100‧‧‧Electronic devices

10, 20‧‧‧Support institutions

30‧‧‧Display unit

11‧‧‧Base

12, 22‧‧‧ support

13, 23‧‧‧ sliding components

14, 24‧‧‧ linkage components

15, 25‧‧‧ elastic parts

16, 26‧‧‧ pivoting seat

121, 221‧‧‧support

123, 223‧‧ ‧ slide rails

1211‧‧‧Connecting Department

1213‧‧‧Pivot hole

1215‧‧‧ Guide slot

1217, 2217‧‧‧ Connection bulges

131‧‧‧Sliding parts

133‧‧‧Resistance

1331‧‧‧Receive Department

1333‧‧‧ pulley

141, 241‧‧‧ first link

142, 242‧‧‧ second link

143‧‧‧third link

144‧‧‧fourth link

145, 243‧‧‧ first pivot

146, 244‧‧‧ second pivot

147, 245‧‧‧ third pivot

148‧‧‧fourth pivot

149, 246‧‧‧ Connections

1481‧‧‧ Nuts

2215‧‧‧First guide channel

2219‧‧‧Second guiding channel

1 is a perspective structural view of an electronic device according to a first embodiment of the present invention.

2 is an exploded perspective view of the support mechanism of the electronic device shown in FIG. 1.

3 is a perspective structural view of the support mechanism of the electronic device shown in FIG. 1 after removing the pivot base.

Figure 4 is a view showing a state in which the slider of the support mechanism of Figure 3 is at the top end of the support base.

Figure 5 is a view showing a state in which the slider of the support mechanism of Figure 3 is at the bottom end of the support base.

Figure 6 is a view showing a state in which the slider of the support mechanism is at the top end of the support base according to the second embodiment of the present invention.

The support mechanism of the present invention can be used for an electronic device such as a liquid crystal monitor, a camera, a desk lamp, etc. In the following embodiments, the support mechanism of the present invention will be further described in detail by taking a liquid crystal monitor as an example.

Referring to FIG. 1 , the electronic device 100 in the first embodiment includes a support mechanism 10 and a display unit 30 supported by the support mechanism 10 .

Referring to FIG. 2 together, the support mechanism 10 includes a base 11 , a support base 12 fixed to the base 11 , a sliding assembly 13 slidably disposed on the support base 12 , and a connecting rod pivotally connected to the support base 12 . The assembly 14 has an elastic member 15 connected at one end to the support base 12 and connected at the other end to the link assembly 14 and a pivot base 16 fixed to the slide assembly 13.

The susceptor 11 is connected to the support base 12 for supporting the entire electronic device 100.

The support base 12 includes a support member 121 and two slide rails 123 fixed to two sides of the support member 121. The two sides of the supporting member 121 are bent to form a connecting portion 1211 for fixing the sliding rail 123. A portion between the connecting portion 1211 defines a pivot hole 1213 and a guiding groove 1215. The guiding groove 1215 is bent away from one side of the pivot hole 1213. The connecting protrusion 1217 that connects the elastic members 15 is formed. The extending direction of the guide groove 1215 is the same as the extending direction of the slide rail 123 fixed to the support member 121. In this embodiment, the slide rail 123 is a chute structure, so that the slide assembly 13 can be accommodated therein.

The slide assembly 13 includes a slider 131 and a resisting portion 133 projecting from the slider 131. The slider 131 is housed in the slide rail 123 of the chute structure. The abutting portion 133 includes a receiving portion 1331 and a pulley 1333 pivotally connected to the receiving portion 1331.

The connecting rod assembly 14 includes a first link 141 and a second link 142 that are pivotally connected to each other, a third link 143 pivotally connected to one end of the first link 141, and a fourth end that is pivotally connected to one end of the second link 142. a connecting rod 144, a first pivot 145 pivotally connecting the first link 141 and the second link 142, a second pivot 146 pivotally connecting the first link 141 and the third link 143, and a second connecting rod The third pivot 147 of the 142 and the fourth link 144, the fourth pivot 148 of the third link 143 and the fourth link 144, and the connecting member 149 pivoted thereto.

Referring to FIG. 2 and FIG. 3 together, the first link 141 and the second link 142 have the same structure and are substantially "L"-shaped rods pivotally connected to the support member 121 passing through the support base 12. The first pivot 145 of the receiving hole 1213 is pivotally connected to the support base 12. The third link 143 and the fourth link 144 are pivotally connected by the fourth pivot 148, and one end of the fourth pivot 148 extends into the guide groove 1215 of the support member 121 of the support base 12, and is supported from the support member 121. The other side is screwed with a nut 1481 to prevent the fourth pivot 148 from slipping out of the support base 12. One end of the connecting member 149 is pivotally connected to the fourth pivot 148, and the other end is connected to the elastic member 15.

One end of the elastic member 15 is connected to the connecting member 149 of the connecting rod assembly 14, and the other end is connected to the connecting protrusion 1217 of the supporting member 121 of the supporting base 12. In the present embodiment, the elastic member 15 is a cylindrical tension spring, and of course, it may be a conical spring, a stretchable elastic piece or the like.

The pivoting seat 16 is fixed to the sliding member 131 of the sliding assembly 13 and is slidable relative to the supporting base 12 along with the sliding assembly 13.

The display unit 30 is coupled to the pivot base 16 and slides with the pivot base 16 relative to the support base 12.

Referring to FIG. 1 , when the electronic device 100 is used, if the height of the display unit 30 is adjusted, the display unit 30 is pulled to cause the display unit 30 to slide the pivoting base 16 and the sliding assembly 13 relative to the support base 12 to adjust The height of the display unit 30.

Referring to FIG. 3 and FIG. 4, when the pivoting seat 16 is at the top end of the supporting base 12, the pulley 1333 of the abutting portion 133 of the sliding assembly 13 resists the first link 141 and the second link 142. Smaller, at this time, the angle at which the first link 141 and the second link 142 are opened is larger. Correspondingly, the third link 143 and the fourth link 144 are also opened at an angle, and the third pivot 147 is located at one end of the connecting groove 1217 of the support member 121 of the support base 12, and the elastic member 15 is at this time. In a natural state or a certain tensile deformation.

Referring to FIG. 5, when the display unit 30 needs to be lowered, the pivoting seat 16 drives the sliding assembly 13 to move relative to the supporting base 12 toward the base 11 under the action of an external force, and the two pulleys 1333 respectively push the first side from the two sides. The connecting rod 141 and the second connecting rod 142 rotate the first link 141 and the second link 142 around the first pivot 145, and at the same time, the first link 141 is pivotally connected with one end and the second end of the third link 143 The distance between the ends of the link 142 pivotally connected to the fourth link 144 is gradually reduced. Further, the third link 143 is rotated relative to the first link 141, the fourth link 144 is rotated relative to the second link 142, and the fourth pivot 148 pivotally connecting the third link 143 and the fourth link 144 is supported along the support. The guide groove 1215 of the seat 12 moves away from the base 11, and the elastic member 15 is pulled by the pulling force of the third link 143 and the fourth link 144 acting on the connecting member 149, and further tensile deformation occurs.

Since the first link 141 and the second link 142 are disposed obliquely with respect to the slide assembly 13, when the slide assembly 13 slides down, the resistance of the slide assembly 13 to the first link 141 and the second link 142 gradually increases. At this time, the elastic member 15 is gradually increased by the elastic deformation, and the elastic restoring force is gradually increased. The increased resisting force of the sliding assembly 13 is converted into the upward pulling force of the elastic member 15 by the link assembly 14. And just in balance with the increased elastic restoring force, the display unit 30 is guaranteed to be lowered to any height and stay.

Referring to FIG. 1 and FIG. 3, when the display unit 30 needs to be turned up, an upward external force is applied to the display unit 30, and the display unit 30 drives the sliding assembly 13 to move upward together, and the sliding group The abutting force of the first end of the first link 141 and the second link 142 is gradually reduced, and the restoring force of the elastic member 15 pulls the fourth pivot 148 to move toward the base 11, and the third link 143 and the fourth link The angle between the links 144 is gradually increased. At the same time, the third link 143 and the fourth link 144 are not pivotally connected to the fourth pivot 148 to push the first link 141 and the second link 142 to make the first link 141 and the second link 142. The lower end gradually opened.

When the slide assembly 13 slides upward, the abutting force between the slide assembly 13 and the first link 141 and the second link 142 gradually decreases. At this time, the elastic deformation of the elastic member 15 is gradually reduced, and the tensile force acting on the third link 143 and the fourth link 144 is gradually reduced, that is, the first link 141 and the second link 142 are oriented. The thrust of the two sides is also gradually reduced. Therefore, the force of the elastic restoring force of the elastic member 15 acting on the first link 141 and the second link 142 is increased or decreased simultaneously with the force of the sliding assembly 13 acting on the first link 141 and the second link 142. Small, the two are always balanced, which in turn enables the display unit 30 to slide and stay at any height.

Referring to FIG. 1 and FIG. 3 together, when the height of the display unit 30 needs to be increased, an upward force is applied to the display unit 30, and the elastic member 15 applies a pulling force to the third pivot 147 in the direction of the base 11 to make the first The three links 143 and the fourth link 144 are both open, and the first link 141 and the second link 142 are also relatively open near one end of the base 11, and the first link 141 and the second link 142 are opposite. The pulley 1333 exerts an oblique upward thrust which cooperates with the applied upward external force to raise the display unit 30.

In the electronic device 100, the gravity of the display unit 30 and the sliding assembly 13 is converted into the thrust of the link assembly 14, and further converted into the first link 141 and the second link 142 to the third link 143 and the fourth The abutting force of the connecting rod 144 is further converted into the pulling force of the third connecting rod 143 and the fourth connecting rod 144 to the elastic member 15, because the connecting rods are inclined with each other, so that the elastic member 15 is subjected to a force much smaller than the display unit 30 and Gravity of the sliding assembly 13 Therefore, the strength requirement of the elastic member 15 is not too high, and it is not easy to cause fatigue quickly.

Moreover, when the electronic device 100 described above is used, the elastic member 15 is not limited as a functional limiting member, and functions only to provide an elastic force. The adjustment stroke of the support mechanism 10 is determined by the length of the slide assembly 13 and the rail 123 of the support base 12, so that the adjustment stroke of the support mechanism 10 of the electronic device 100 can be ensured even after a plurality of uses.

During the sliding of the sliding assembly 13 relative to the support base 12, the elastic restoring force of the elastic member 15 causes the first link 141 and the second link 142 to have a relatively open tendency, and the elastic restoring force is connected with the sliding assembly 13 The rod assembly 14 changes in the resistance of the rod. Therefore, the first link 141 and the second link 142 are always in contact with the sliding assembly 13, so that the sliding member 131 of the sliding assembly 13 and the sliding rail 123 of the support base 12 have a large frictional force, and the sliding assembly 13 can be ensured. The support base 12 slides and stays at any position.

In the electronic device 100, the restoring force of the elastic member 15 is converted into the upward force of the first link 141 and the second link 142 against the sliding assembly 13. When an external force is applied to cause the display unit 30 to go downward and the external force direction is downward, the first link 141 and the second link 142 are opposite to each other in the direction of the external force applied to the slide assembly 13, and then the display unit 30 is pulled down. The external force required is large. When an external force is applied to bring the display unit 30 upward, and the external force direction is upward, the abutting force of the first link 141 and the second link 142 to the sliding assembly 13 is substantially the same as the direction of the applied external force, and when the display unit 30 is raised upward The external force required to be applied is small. That is, the display unit 30 is pulled down to require a large force, and the display unit 30 is lifted up to a small force, which is ergonomic and has a good hand feeling.

When the display unit 30 is moved downward, the display unit 30 moves downward, and the restoring force of the elastic member 15 increases, and the resistance of the first link 141 and the second link 142 to the sliding assembly 13 is obliquely upward. Large, it is possible to prevent the display unit 30 from falling instantaneously when the display unit 30 is pulled.

It can be understood that the connecting member 15 can also be omitted, and one end of the elastic member 15 is directly connected to one of the third link 143, the fourth link 144 and the fourth pivot 148.

It can be understood that one end of the elastic member 15 connected to the support base 12 can also be directly connected to the base 11.

It can be understood that the pulley 1333 in the sliding assembly 13 can also be omitted, and the receiving portion 1331 directly abuts against the connecting rod assembly 14.

Referring to FIG. 6, the support mechanism 20 of the second embodiment of the present invention has a structure similar to that of the support mechanism 10 of the first embodiment, except that the link assembly 24 of the second embodiment includes only the first link that is pivotally connected. 241 and the second link 242, the first pivot 243 pivotally connecting the first link 241 and the second link 242, and the second pivot 244 pivotally connected to one end of the first link 241 away from the first pivot 243 a first pivot 245 and a connecting member 246 pivotally connected to one end of the second link 242 away from the first pivot 243; the first guiding groove 2215 and the second guiding groove 2219 perpendicular to each other are formed on the supporting base 22; Both the 25 and the connecting projections 2217 are disposed above the link assembly 24. The second pivot 244 and the third pivot 245 both pass through the second guiding groove 2219 and can slide in the second guiding groove 2219. In this embodiment, the elastic member 25 is a compression spring.

When the sliding member 23 drives the connecting seat 26 to slide downward relative to the supporting base 22, the first link 241 is pivotally connected with one end of the second pivot 244 and the second link 242 is pivotally connected with the third pivot 245. The two guiding grooves 2219 slide and gradually approach, and one end of the first link 241 and the second link 242 pivotally connected with the first pivot 243 moves upward along the first guiding groove 2215, and the elastic member 25 is compressed. On the other hand, when the sliding member 23 slides upward relative to the support base 22, the first link 241 is pivotally connected with one end of the second pivot 244 and the second link 242 is pivotally connected with one end of the third pivot 245. The slot 2219 slides and gradually moves away, and one end of the first link 241 and the second link 242 pivoted with the first pivot 243 is downward along the first guiding slot 2215. Movement, the elastic member 25 is gradually restored.

In this embodiment, the second guiding groove 2219 functions as a limit to ensure that one end of the first link 241 and the second link 242 are not pivotally maintained at a specific height, thereby ensuring that the two are able to resist the sliding member 23. hold.

In the second embodiment of the present invention, the adjustment stroke is also set by the length of the sliding member 23 and the sliding rail 223 of the support base 22. The elastic member 25 only provides an elastic force to facilitate the sliding of the sliding member 23, so that the adjustment stroke can be ensured for multiple use. In addition, the link assembly 24 in the second embodiment has a smaller number of links and a relatively simple structure than the link assembly 14 (see FIG. 3) in the first embodiment.

It will be appreciated that four or more mutually pivoted links may also achieve the effect of the linkage assembly 24.

It can be understood that the second guiding groove 2219 can be omitted, and the plate-shaped limiting portion that protrudes directly from the supporting member 221 of the supporting base 22 and extends in the same direction as the extending direction of the second guiding groove 2219, the first connection One end of the rod 241 and the second link 242 that are not pivoted may be abutted against the plate-shaped limiting portion. Accordingly, the second pivot 244 and the third pivot 245 are omitted.

In summary, the present invention has indeed met the requirements of the invention patent, and has filed a patent application according to law. However, the above description is only a preferred embodiment of the present invention, and it is not possible to limit the scope of the patent application of the present invention. Equivalent modifications or variations made by persons skilled in the art in light of the spirit of the invention are intended to be included within the scope of the following claims.

12‧‧‧ support

13‧‧‧Sliding components

14‧‧‧ Connecting rod assembly

15‧‧‧Flexible parts

121‧‧‧Support

123‧‧‧rails

1215‧‧‧ Guide slot

1217‧‧‧ Connection bulge

131‧‧‧Sliding parts

133‧‧‧Resistance

1331‧‧‧Receive Department

1333‧‧‧ pulley

141‧‧‧first link

142‧‧‧second link

143‧‧‧third link

144‧‧‧fourth link

145‧‧‧First pivot

146‧‧‧second pivot

147‧‧‧ Third pivot

148‧‧‧fourth pivot

149‧‧‧Connecting parts

Claims (9)

A support mechanism includes a support base, an elastic member, and a sliding assembly slidably disposed on the support base, wherein the support mechanism further includes a link assembly disposed on the support base, the link assembly including a pivot a first connecting rod and a second connecting rod connected to the supporting base, a third connecting rod pivotally connected to the first connecting rod and a fourth connecting rod pivotally connected to the second connecting rod, the third connecting rod and the third connecting rod The fourth connecting rod is pivotally connected, the elastic member is connected to the supporting base at one end, and the other end is connected to one end of the third connecting rod and the fourth connecting rod. The sliding assembly comprises a sliding member and the sliding member An upwardly protruding abutting portion, the sliding member sliding relative to the supporting seat, the abutting portion abutting against the first connecting rod and the second connecting rod, when the sliding assembly slides relative to the supporting seat, the resisting Abutting the first link and the second link to rotate the respective links of the link assembly and deform the elastic member, and the restoring force of the elastic member is transmitted to the link assembly and the first A link and a second link abut against the abutting portion. The support mechanism of claim 1, wherein the abutting portion comprises a receiving member and a pulley pivotally connected to the receiving member, the pulley abutting against the connecting rod assembly and opposite to the receiving member and the connecting rod The assembly turns. The support mechanism of claim 1, wherein the third link and the fourth link are pivotally connected by a pivot, and the support base further defines a guiding slot, the pivoting third link and the third link One end of the pivot of the four-link extends into the guide groove and slides along the guide groove. A support mechanism includes a support base, an elastic member, and a sliding assembly slidably disposed on the support base, wherein the support mechanism further includes a link assembly pivotally connected to the support base and included a first connecting rod and a second connecting rod that are pivotally connected to each other, wherein one end of the elastic member is connected to one end of the first connecting rod and the second connecting rod, and the other end is connected to the supporting base, and the supporting seat is opened a position of the first link and the second link sliding along the limiting portion, During the sliding process of the sliding assembly, a different resisting force is applied to the connecting rod assembly, so that the plurality of connecting rods of the connecting rod assembly are relatively rotated, and the elastic member is deformed to different degrees to provide a varying elastic force. The restoring force of the member is transmitted to the link assembly and the link assembly is abutted against the slide assembly. The support mechanism of claim 4, wherein the limiting portion is a guiding slot formed on the supporting seat, and the first connecting rod and the second connecting rod are not pivotally connected along the guiding slot The elastic member is coupled to the pivotal portion of the first link and the second link and moves together with the first link and the second link. The support mechanism of claim 4, wherein the link assembly includes a first link and a second link that are pivotally connected to each other, a third link that is pivotally connected to the first link, and the first link a fourth link pivotally connected to the second link, the third link is pivotally connected to the fourth link, the elastic member is connected at one end to the support base, and the other end is connected to the third link and the fourth link phase The part of the pivot. The support mechanism of claim 6, wherein the third link and the fourth link are located between the first link and the second link, and the first link and the second link are opposite to the Slide assembly tilt settings. The support mechanism of claim 4, wherein the sliding assembly comprises a sliding member and a pulley disposed on the sliding member, the pulley being abutted against the first connecting rod and the second connecting rod. An electronic device includes a display unit and a support mechanism supporting the display unit, the support mechanism includes a support base, an elastic member, and a sliding assembly slidably disposed on the support base, the display unit is connected to the sliding member, and the improved The support mechanism further includes a link assembly disposed on the support base, the link assembly includes a first link and a second link pivotally connected to the support base, and is pivotally connected to the first link a third link and a fourth link pivotally connected to the second link, the third link is pivotally connected to the fourth link, the elastic member is connected at one end to the support base, and the other end is connected to the third link One end of the connecting rod and the fourth connecting rod, the sliding assembly comprises a sliding member and a pulley disposed on the sliding member, the pulley is abutted against the first connecting rod and the second connecting rod, when the When the sliding assembly slides relative to the support base, the pulley abuts against the first link and the second link, so that the links of the link assembly rotate relative to each other and the elastic member is deformed, and the elastic member recovers It is transmitted to the link assembly and the first link and the second link are abutted against the pulley.