Escape function handle lock

Abstract

The utility model relates to a handle lock with escape function. Including outer handle total assembly, square bar and inner handle total assembly, the outer handle total assembly includes outer handle subassembly, the inner handle total assembly includes inner handle subassembly, knob subassembly, inner cylinder cam and inner handle seat, the square bar straddles between outer handle subassembly and inner handle subassembly, and one end of square bar inserts into outer square hole, and the other end of square bar inserts into inner square hole, the bumper can rotatably install in outer handle subassembly, and the outer end of bumper in outer handle subassembly is equipped with the outer push rod that leans on the outer curve profile of outer cylinder cam, the inner end of bumper inserts into knob subassembly after passing square bar, to make knob subassembly rotate when driving bumper rotate. The utility model has the following beneficial technical effects simultaneously: 1, can realize quick escape, 2, have higher product versatility, can be suitable for left open door and right open door simultaneously, 3, low installation requirement, installation is convenient and fast.

Description

Technical Field

[0001] This utility model relates to a lever lock with an escape function. Background Technology

[0002] Existing lever locks use a knob to lock and unlock. For example, Chinese Utility Model Patent CN207999130 U discloses a quick-unlocking structure for a mechanically separable lever lock. The outer lever assembly consists of an outer lever and a front bar, while the inner lever assembly consists of an inner lever, a cam knob, a rear bar, and a push rod. By rotating the cam knob, the linkage and push rod are used to control the separation and connection of the front and rear bars to achieve locking and unlocking. Furthermore, the inner lever can directly drive the linkage to reverse, achieving quick unlocking without rotating the cam knob, thus facilitating rapid unlocking and escape in emergencies.

[0003] However, this existing technology uses a toothed clutch structure with two independent front and rear square strips, which requires extremely high assembly precision. The teeth must be perfectly aligned; otherwise, the engagement will become stuck or even impossible. Errors in the door panel's opening and the assembly position of the inner and outer handles both affect the process. Furthermore, due to the limited space in the door panel's lock hole, manually aligning the front and rear square strips is difficult and inconvenient during installation. Utility Model Content

[0004] The purpose of this utility model is to propose a lever lock with an escape function, including an outer lever assembly, a square bar, and an inner lever assembly;

[0005] The outer handle assembly includes an outer handle assembly and an outer handle seat for fixed installation on the outside of the door panel. The outer handle assembly is rotatably installed on the outer handle seat and has an outer square hole for inserting a square rod.

[0006] The inner handle assembly includes an inner handle assembly, a knob assembly, an inner cylindrical cam, and an inner handle seat for fixed mounting on the inside of the door panel. The inner handle assembly is rotatably mounted on the inner handle seat and has an inner square hole for inserting a square rod.

[0007] The inner cylindrical cam is fixed relative to the inner handle assembly in the circumferential direction and slidably mounted in the inner handle assembly relative to the inner handle assembly in the axial direction;

[0008] The knob assembly is rotatably mounted in the inner handle assembly between a locked position and an unlocked position, and the direction in which the knob assembly rotates from the unlocked position to the locked position is the first direction, and the direction in which it rotates from the locked position to the unlocked position is the second direction.

[0009] The end face of the inner cylindrical cam is provided with an inner curved profile. The knob assembly has an inner push rod that abuts against the inner curved profile of the inner cylindrical cam. The inner handle assembly is provided with an inner spring that keeps the inner curved profile of the inner cylindrical cam in contact with the inner push rod. When the knob assembly is rotated, the inner cylindrical cam is forced to slide along its axial direction through the inner push rod.

[0010] The square rod spans between the outer handle assembly and the inner handle assembly, with one end of the square rod inserted into the outer square hole and the other end of the square rod inserted into the inner square hole;

[0011] The outer handle assembly also includes a bumper and an outer cylindrical cam. The outer cylindrical cam is fixed relative to the outer handle assembly in the circumferential direction and is slidably mounted in the outer handle assembly relative to the outer handle assembly in the axial direction. The end face of the outer cylindrical cam has an outer curved profile.

[0012] The square rod is hollow;

[0013] The safety bar is rotatably mounted in the outer handle assembly, and the outer end of the safety bar in the outer handle assembly is provided with an outer push rod that abuts against the outer curved profile of the outer cylindrical cam. The outer handle assembly is provided with an outer spring that keeps the curved profile of the outer cylindrical cam in contact with the outer push rod. When the safety bar rotates, the outer cylindrical cam is forced to slide along its axial direction by the outer push rod.

[0014] A clutch structure is provided between the outer cylindrical cam and the outer handle seat;

[0015] The clutch structure has an engaged state that restricts the rotation of the outer cylindrical cam relative to the outer handle seat and a disengaged state that allows the outer cylindrical cam to rotate relative to the outer handle seat, and the engaged and disengaged states of the clutch structure switch when the outer cylindrical cam slides.

[0016] The inner end of the bumper passes through the square rod and inserts into the knob assembly, so that rotating the knob assembly causes the bumper to rotate.

[0017] The clutch mechanism switches from a disengaged state to an engaged state when the knob assembly is rotated in the first direction.

[0018] The clutch mechanism switches from an engaged state to a disengaged state when the knob assembly is rotated in the second direction.

[0019] The inner curve profile of the inner cylindrical cam includes an inner thrust section that extends spirally around the axis of the inner cylindrical cam, an inner unlocking and parking section connected to the bottom end of the inner thrust section, and an inner locking and parking section connected to the top end of the inner thrust section.

[0020] The inner unlocking and inner locking parking sections are configured to allow the inner push rod to stop;

[0021] When the inner push rod is in the inner unlocking parking section, the knob assembly is in the unlocked position;

[0022] When the inner push rod is in the inner locked parking section, the knob assembly is in the locked position;

[0023] The first end of the internal locking parking section is connected to the internal thrust section;

[0024] The end face of the inner cylindrical cam is also provided with a blocking part located at the end of the inner locking and parking section to block the inner push rod;

[0025] When the inner push rod, which is in the inner locking parking section, rotates from the inner locking parking section through the inner thrust section to the inner unlocking parking section in the first direction, it drives the knob assembly to rotate in the second direction.

[0026] When the inner push rod, which is in the inner locking parking section, is pushed by the blocking part when the inner handle assembly rotates in the second direction, it causes the knob assembly to rotate in the second direction.

[0027] This utility model simultaneously possesses the following beneficial technical effects: 1. Enables rapid escape;

[0028] 2. It has high product versatility and can be used for both left-opening and right-opening doors;

[0029] 3. Low installation requirements, easy and quick installation. Attached Figure Description

[0030] Figure 1 and Figure 2 Two perspective views of this utility model from different angles are shown respectively;

[0031] Figure 3 and Figure 4 Two exploded perspective views of this utility model from different angles are shown respectively;

[0032] Figure 5 The front view of this utility model is shown;

[0033] Figure 6 It shows Figure 5 AA section view;

[0034] Figure 7 It shows Figure 6 BB section view;

[0035] Figure 8 and Figure 9 Two exploded perspective views of the external handle assembly of this utility model are shown from different angles.

[0036] Figure 10 and Figure 11 Two exploded perspective views of the inner handle assembly of this utility model are shown from different angles.

[0037] Figure 12 A perspective view of the knob assembly, inner cylindrical cam, safety bar, and outer cylindrical cam of this utility model is shown, wherein the knob assembly is in the locked position;

[0038] Figure 13 It shows in Figure 12 The diagram shows the knob assembly after being rotated to the unlock position.

[0039] Figure 14 An exploded perspective view of the knob assembly and inner cylindrical cam of this utility model is shown.

[0040] Figure 15 An exploded perspective view of the bumper and outer cylindrical cam of this utility model is shown.

[0041] Figure 16 A schematic diagram of the clutch structure of this utility model is shown, wherein the clutch structure is in a disengaged state;

[0042] Figure 17 It shows in Figure 16 A schematic diagram showing the clutch mechanism switching to the engaged state;

[0043] Figure 18 An exploded perspective view of the outer handle seat and the outer cylindrical cam of this utility model is shown.

[0044] Figures 19 to 21 A schematic diagram illustrating the working principle of the external torsion spring of this utility model is shown.

[0045] Figures 22 to 24 A schematic diagram illustrating the working principle of the internal torsion spring of this utility model is shown.

[0046] Figure 25 This diagram shows the inner handle assembly after it has been rotated a certain angle in the second direction L2.

[0047] Figure 26 A schematic diagram showing that the outer upper locking and parking section of the outer cylindrical cam is inclined is shown.

[0048] Icon labels:

[0049] 100 external handle assembly, 200 square rod, 300 internal handle assembly;

[0050] 10 Outer handle assembly, 101 Outer square hole, 102 Outer slide groove, 103 Outer spring, 104 Outer torsion spring, 105 Outer moving block, 106 Spring leg of outer torsion spring, 107 Outer handle, 108 Outer cylinder, 109 Outer rotating frame;

[0051] 20 Outer handle seat, 201 Recess, 202 Outer center hole, 203 Outer fixed stop block, 204 Outer support tube;

[0052] 30 Inner handle assembly, 301 Inner square hole, 302 Inner slide groove, 303 Inner spring, 304 Inner torsion spring, 305 Inner moving block, 306 Spring leg of inner torsion spring, 307 Inner handle, 308 Inner cylinder, 309 Inner rotating frame;

[0053] 40 Knob assembly, 401 Inner push rod, 402 Square hole, 403 Knob bracket;

[0054] 50 Inner cylindrical cam, 501 Inner guide convex key, 502 Inner thrust section, 503 Inner unlocking and parking section, 504 Inner locking and parking section, 505 Blocking part;

[0055] 60 inner handle base, 601 inner stop block, 602 inner support tube;

[0056] 70 bumper, 701 bumper outer end, 702 push rod, 703 bumper inner end;

[0057] 80 External cylindrical cam, 801 External guide convex key, 802 convex part, 803 External thrust section, 804 External unlocking and parking section, 805 External locking and parking section;

[0058] 90 locks. Detailed Implementation

[0059] The following description, in conjunction with the accompanying drawings, further illustrates the proposed solution.

[0060] like Figures 1 to 26 The lever lock shown includes an outer lever assembly 100, a square bar 200, and an inner lever assembly 300.

[0061] The outer handle assembly 100 includes an outer handle assembly 10 and an outer handle seat 20 for fixedly mounting on the outside of a door panel (not shown). The outer handle assembly 10 is rotatably mounted on the outer handle seat 20. The outer handle assembly 10 has an outer square hole 101 for inserting a square rod 200.

[0062] The inner handle assembly 300 includes an inner handle assembly 30, a knob assembly 40, an inner cylindrical cam 50, and an inner handle seat 60 for fixed installation on the inner side of the door panel. The inner handle assembly 30 is rotatably mounted on the inner handle seat 60, and the inner handle assembly 30 has an inner square hole 301 for inserting a square rod 200.

[0063] The inner cylindrical cam 50 is fixed relative to the inner handle assembly 30 in the circumferential direction and slidably mounted in the inner handle assembly 30 in the axial direction. This allows the inner cylindrical cam 50 to rotate with the inner handle assembly 30 and also slide relative to the inner handle assembly 30 along its axial direction. The axial direction of the inner cylindrical cam 50 is parallel to the length direction of the square rod 200. In this embodiment, the inner handle assembly 30 is provided with an inner groove 302 extending along the axial direction of the inner cylindrical cam 50, and the inner cylindrical cam 50 is provided with an inner guide key 501 that slides into the inner groove 302. This enables the inner cylindrical cam 50 to be fixed relative to the inner handle assembly 30 in the circumferential direction and to slide relative to the inner handle assembly 30 in the axial direction.

[0064] The knob assembly 40 is rotatably mounted in the inner handle assembly 30 between a locked position and an unlocked position. The direction in which the knob assembly 40 rotates from the unlocked position to the locked position is a first direction L1, and the direction in which it rotates from the locked position to the unlocked position is a second direction L2. Figure 12 and Figure 17 The knob assembly 40 is shown in the locked position. Figure 13 and Figure 16 The knob assembly 40 is shown in the unlocked position;

[0065] The end face of the inner cylindrical cam 50 is provided with an inner curved profile. The knob assembly 40 has an inner push rod 401 that abuts against the inner curved profile of the inner cylindrical cam 50. The inner handle assembly 30 is provided with an inner spring 303 that keeps the inner curved profile of the inner cylindrical cam in contact with the inner push rod 401. When the knob assembly 40 is rotated, the inner cylindrical cam 50 is forced to slide along its axial direction through the inner push rod 401.

[0066] The square rod 200 spans between the outer handle assembly 10 and the inner handle assembly 30, with one end of the square rod 200 inserted into the outer square hole 101 and the other end inserted into the inner square hole 301. This allows the square rod 200 to rotate when both the outer handle assembly 10 and the inner handle assembly 30 rotate. The rotation of the square rod 200 can drive the movement of the latch (not shown in the figure) installed in the door panel. In this embodiment, one end of the square rod 200 can be pre-installed in the outer handle assembly 10, making the square rod 200 part of the outer handle assembly 100. This further improves the convenience for users to install this product on the door panel.

[0067] The outer handle assembly 100 also includes a safety bar 70 and an outer cylindrical cam 80. The outer cylindrical cam 80 is fixed relative to the outer handle assembly 10 in the circumferential direction and slidably mounted in the outer handle assembly 10 in the axial direction, thereby enabling the outer cylindrical cam 80 to rotate with the outer handle assembly 10 and slide relative to the outer handle assembly 10 along its axial direction. The axis of the outer cylindrical cam 80 coincides with the axis of the inner cylindrical cam 50. In this embodiment, the outer handle assembly 10 is provided with an outer groove 102 extending along the axial direction of the outer cylindrical cam 80, and the outer cylindrical cam 80 is provided with an outer guide key 801 that slides into the outer groove 102. This enables the outer cylindrical cam 80 to be fixed relative to the outer handle assembly 10 in the circumferential direction and slide relative to the outer handle assembly 10 in the axial direction. The end face of the outer cylindrical cam 80 is provided with an outer curved profile.

[0068] The square rod 200 is hollow;

[0069] The safety bar 70 is rotatably mounted in the outer handle assembly 10, and the outer end 701 of the safety bar 70 in the outer handle assembly is provided with an outer push rod 702 that abuts against the outer curved profile of the outer cylindrical cam 80. The outer handle assembly 10 is provided with an outer spring 103 that keeps the curved profile of the outer cylindrical cam 80 in contact with the outer push rod 702. When the safety bar 70 rotates, the outer cylindrical cam 80 is forced to slide along its axial direction by the outer push rod.

[0070] A clutch structure is provided between the outer cylindrical cam 80 and the outer handle seat 20. Since the outer handle seat 20 is fixed to the door panel, the clutch structure is provided between the outer cylindrical cam 80 and the outer handle seat 20 to improve the stability and reliability of locking.

[0071] The clutch structure has an engaged state that restricts the rotation of the outer cylindrical cam 80 relative to the outer handle seat 20 and a disengaged state that allows the outer cylindrical cam 80 to rotate relative to the outer handle seat 20. The engaged and disengaged states of the clutch structure switch when the outer cylindrical cam 80 slides. In this embodiment, since the outer cylindrical cam 80 is fixed relative to the outer handle assembly 10 in the circumferential direction, when the clutch structure is in the engaged state, the rotation of the outer cylindrical cam 80 is restricted by the outer handle seat 20 to achieve the purpose of restricting the rotation of the outer handle assembly 10.

[0072] The inner end 703 of the safety bar passes through the square rod 200 and is inserted into the knob assembly 40, so that when the knob assembly rotates, 40 drives the safety bar 70 to rotate.

[0073] The clutch mechanism switches from a disengaged state to an engaged state when the knob assembly 40 is rotated in the first direction.

[0074] The clutch mechanism switches from an engaged state to a disengaged state when the knob assembly 40 is rotated in the second direction.

[0075] The inner curve profile of the inner cylindrical cam 50 includes an inner thrust section 502 that extends spirally around the axis of the inner cylindrical cam 50, an inner unlocking and parking section 503 connected to the bottom end of the inner thrust section 502, and an inner locking and parking section 504 connected to the top end of the inner thrust section 502.

[0076] The inner unlocking parking section 503 and the inner locking parking section 504 are configured to allow the inner push rod 401 to stop;

[0077] like Figure 13 As shown, when the inner push rod 401 is stopped in the inner unlocking parking section 503, the knob assembly 40 is in the unlocked position;

[0078] like Figure 12 As shown, when the inner push rod 401 is stopped in the inner locked parking section 504, the knob assembly 40 is in the locked position;

[0079] The first end of the inner locking parking section 504 is connected to the inner thrust section 502;

[0080] The end face of the inner cylindrical cam 50 is also provided with a blocking part 505 located at the end of the inner locking parking section 504 to block the inner push rod 401.

[0081] When the inner push rod 401, which is in the inner locking parking section 504, rotates in the first direction L1, it slides from the inner locking parking section 504 through the inner thrust section 502 to the inner unlocking parking section 503, thereby driving the knob assembly 40 to rotate in the second direction L2, so that the knob assembly 40 can rotate from the locked position to the unlocked position.

[0082] When the inner push rod 401, which is in the inner locked parking section 504, is pushed by the blocking part 505 when the inner handle assembly 30 (i.e., the inner cylindrical cam 50) rotates in the second direction L2, the knob assembly 40 is driven to rotate in the second direction L2, so that the knob assembly 40 can be rotated from the locked position to the unlocked position.

[0083] This technical solution utilizes the linkage of the knob assembly 40, the safety lever 70, and the outer cylindrical cam 80 to operate the clutch structure when rotating the knob assembly 40 to achieve locking and unlocking;

[0084] When the knob assembly 40 is in the locked position, the inner handle assembly 30 is rotated along the first direction L1 to drive the inner cylindrical cam 50 to rotate. When the inner push rod of the knob assembly reaches the inner thrust section, the inner spring and the inclined inner thrust section are used to force the inner push rod (i.e., the knob assembly) to rotate in the second direction L2, so that the knob assembly 40 can be rotated from the locked position to the unlocked position. Thus, the knob assembly 40 can be unlocked by rotating the inner handle assembly 30 along the first direction, without having to first rotate the knob assembly 40 to unlock it, so as to quickly open it in case of emergency.

[0085] When the knob assembly 40 is in the locked position, rotating the inner handle assembly 30 in the second direction causes the inner cylindrical cam 50 to rotate. The blocking part pushes the inner push rod (i.e., the knob assembly) to rotate in the second direction L2 along with the inner handle assembly, allowing the knob assembly 40 to rotate from the locked position to the unlocked position. This allows unlocking to be achieved while rotating the inner handle assembly in the second direction, eliminating the need to first rotate the knob assembly to unlock, facilitating quick opening in emergency situations. Furthermore, if... Figure 25 As shown, after the inner handle assembly 30 rotates a certain angle in the second direction L2, the outer push rod 702 of the bumper also rotates with the inner handle assembly, causing the outer push rod 702 of the bumper to slide from the outer locking and parking section 805 to the outer thrust section 803. Since the outer thrust section 803 is spirally inclined, the outer spring 103... Figure 25 During the upward pushing of the outer cylindrical cam 80, the outer thrust section 803 forces the outer push rod 702 of the safety bar (i.e., the safety bar 70 and the knob assembly 40) to rotate in the second direction L2 relative to the inner handle assembly 30 and the inner cylindrical cam 50. In other words, the knob assembly 40 rotates ahead of the inner cylindrical cam 50 in the second direction L2. This allows the inner push rod 401 of the knob assembly 40 to slide sequentially through the inner locking and parking section 504 and the inner thrust section 502 before reaching the inner unlocking and parking section 503, thus achieving the unlocking purpose. This structure allows unlocking to be completed before the inner handle reaches its full rotation in the second direction L2, saving unlocking time and increasing escape opportunities.

[0086] This design allows the inner handle assembly to be unlocked regardless of whether it is rotated in the first or second direction, making the product suitable for both left-opening and right-opening doors and improving its versatility. For example, for a left-opening door, the product is installed on the left side of the door panel and unlocks when the inner handle assembly is rotated downwards (i.e., in the first direction); for a right-opening door, the product is installed on the right side of the door panel and unlocks when the inner handle assembly is rotated downwards (i.e., in the second direction).

[0087] When the knob assembly 40 rotates in the second direction L2, it will cause the safety lever 70 to rotate in the same direction. At this time, the outer push rod 702 of the safety lever rotates from the outer locking parking section 805 of the outer cylindrical cam 80 to the outer unlocking parking section 804. Under the action of the outer spring 103, the outer cylindrical cam 80... Figure 12 The outer cylindrical cam 80 moves upward, causing it to slide to the separation position, thereby separating the outer cylindrical cam 80 from the outer handle seat 20 and unlocking the outer handle assembly. At this time, the outer handle assembly and the outer cylindrical cam 80 can rotate relative to the outer handle seat 20.

[0088] Furthermore, this product requires only one square rod for installation, and the square rod is fitted over the safety bar. This allows the square rod and safety bar to pass through the lock hole in the door panel and assemble with the inner handle assembly without needing to align them in the lock hole. As a result, this product has low installation precision requirements and is easy and quick to install.

[0089] Therefore, this product also possesses the following beneficial technical effects: 1. Enables rapid escape;

[0090] 2. It has high product versatility and can be used for both left-opening and right-opening doors;

[0091] 3. Low installation requirements, easy and quick installation.

[0092] The clutch structure includes a recess 201 on the outer handle seat 20 and a protrusion 802 on the outer cylindrical cam 80;

[0093] When the bumper 70 rotates, it pushes the outer cylindrical cam 80 to slide between an engaged position and a disengaged position, wherein...

[0094] like Figure 16 As shown, when the knob assembly 40 reaches the unlock position, the outer cylindrical cam 80 is in the disengaged position, the clutch structure is in the disengaged state, and the protrusion 802 moves away from the recess 201 to allow the outer cylindrical cam 80 to rotate relative to the outer handle seat 20 in the circumferential direction, thereby allowing the outer cylindrical cam 80 and the outer handle assembly 10 to rotate relative to the outer handle seat 20.

[0095] like Figure 17 As shown, when the knob assembly 40 reaches the locked position, the outer cylindrical cam 80 is in the engaged position, the clutch structure is in the engaged state, and the protrusion 802 is placed into the recess 201 so that the outer cylindrical cam 80 is fixed relative to the outer handle seat 20 in the circumferential direction, thereby restricting the rotation of the outer cylindrical cam 80 and the outer handle assembly 10 relative to the outer handle seat.

[0096] The clutch structure disclosed in this technical solution is simple and easy to implement. The use of concave and convex parts ensures stable and reliable engagement.

[0097] The outer handle seat 20 is provided with an outer central hole 202 through which the outer cylindrical cam 80 passes, and the recess 201 is a notch provided on the hole wall of the outer central hole 202;

[0098] The protrusion 802 is a radial tooth provided on the circumferential sidewall of the outer cylindrical cam 80.

[0099] The disclosed concave and convex tooth structure of this technical solution is simple and easy to implement.

[0100] Both the inner unlocking parking section 503 and the inner locking parking section 504 are planar in shape perpendicular to the axis of the inner cylindrical cam 50;

[0101] The inner cylindrical cam 50 has an end face with an inner curved profile that faces the knob assembly 40, and the inner locking parking section 504 is closer to the knob assembly 40 than the inner unlocking parking section 503.

[0102] The outer curved profile of the outer cylindrical cam 80 includes an outer thrust section 803 that extends spirally around the axis of the outer cylindrical cam 80, an outer unlocking and parking section 804 connected to the bottom end of the outer thrust section 803, and an outer locking and parking section 805 connected to the top end of the outer thrust section 803.

[0103] The external unlocking and parking section 804 is in the shape of a plane perpendicular to the axis of the outer cylindrical cam 80;

[0104] like Figure 26 As shown, the external locking parking section 805 is inclined. The end of the external locking parking section connected to the top of the external thrust section is the first end, and the other end of the external locking parking section away from the top of the external thrust section is the second end. The first end is closer to the knob assembly than the second end, making the first end higher than the second end. By inclining the external locking parking section 805, after the external push rod reaches the second end of the external locking parking section, the external locking parking section 805 can prevent the external push rod from sliding towards the first end, avoiding natural sliding of the external push rod 702 on the external locking parking section 805, thus ensuring the locking stability of the bumper and knob assembly.

[0105] The outer cylindrical cam 80 has an end face with an outer curved profile that also faces the knob assembly 40, and the outer locking parking section 805 is also closer to the knob assembly 40 than the outer unlocking parking section 804, which facilitates the layout design of the outer spring, the outer cylindrical cam, and the outer push rod of the safety bar.

[0106] The external handle assembly 10 is equipped with a lock head 90. The outer end 701 of the safety bar is inserted into the lock head 90. After the key is inserted, the lock head 90 can drive the safety bar 70 to rotate. The lock head can be used to unlock the door with the key.

[0107] One end of the inner spring 303 abuts against the inner handle assembly 30, and the other end abuts against the inner cylindrical cam 50;

[0108] The cross-sections of the outer square hole 101, the inner square hole 301, and the square rod 200 are all square. The side lengths of the outer square hole 101 and the inner square hole 301 are both greater than the side length of the square rod 200. This allows the square rod to be loosely inserted into the outer and inner square holes, and the outer handle assembly and the inner handle assembly to rotate at a certain angle before driving the square rod to rotate. This technical solution is reasonably designed and easy to implement.

[0109] The axis of the inner cylindrical cam 80 is parallel to the length direction of the square rod 200, and the axis of the outer cylindrical cam 80 coincides with the axis of the inner cylindrical cam 50. This technical solution is reasonably designed and conducive to the smooth operation of each component.

[0110] The external handle assembly 100 also includes an external torsion spring 104 for driving the external handle assembly 10 to rotate and then return to its original position;

[0111] The outer handle base 20 is provided with an outer fixed stop 203, and the outer handle assembly 10 is provided with an outer movable stop 105. The outer torsion spring 104 is installed on the outer handle base 20, and the outer fixed stop 203 and the outer movable stop 105 are simultaneously clamped between the two spring legs 106 of the outer torsion spring, so that the outer handle assembly 10 can be subjected to the elastic force of the outer torsion spring 104 when rotating in the first direction or the second direction. In addition, the outer handle assembly can be clamped by the two spring legs of the outer torsion spring at the same time, which makes the rotation of the outer handle assembly more stable and can accurately return to its original position after rotation, avoiding loosening.

[0112] like Figure 19 As shown, the outer handle assembly 10 is in the reset state, and the two spring legs 106 of the outer torsion spring simultaneously clamp the outer fixed stop block 203 and the outer moving stop block 105.

[0113] like Figure 20 As shown, after the outer handle assembly 10 rotates clockwise by a certain angle, the spring leg 106 of the outer torsion spring located at the top of the figure is driven upward by the outer moving block 105;

[0114] like Figure 21 As shown, after the outer handle assembly 10 rotates counterclockwise by a certain angle, the spring leg 106 of the outer torsion spring located at the bottom of the figure is driven to deflect downward by the outer moving block 105.

[0115] In this embodiment, the outer handle assembly 10 includes an outer handle, an outer cylinder 108, and an outer rotating frame 109; an outer sliding groove 102 is provided on the peripheral wall of the outer cylinder 108, and an outer spring 103 and an outer cylindrical cam 80 are both installed in the outer cylinder 108; the outer end of the outer cylinder 108 is inserted into the outer handle 107, and the outer cylinder 108 and the outer handle 107 are fixedly assembled; the inner end of the outer cylinder 108 passes through the outer handle seat 20, and the outer handle assembly 10 is rotatably installed on the outer handle seat 20 by means of the outer cylinder 108; an outer support cylinder 204 is provided on the outer handle seat 20, which is sleeved outside the outer cylinder, and an outer torsion spring 104 is sleeved outside the outer support cylinder; the outer rotating frame 109 is fixedly installed on the inner end of the outer cylinder 108; an outer moving block 105 and an outer square hole 101 are both provided on the outer rotating frame 109; and the outer end 701 of the safety bar is inserted into the outer cylinder 108.

[0116] The inner handle assembly 300 also includes an inner torsion spring 304 for driving the inner handle assembly 30 to rotate and then return to its original position.

[0117] The inner handle base 60 is provided with an inner fixed stop 601, and the inner handle assembly 30 is provided with an inner moving stop 305. The inner torsion spring 304 is installed on the inner handle base 60, and the inner fixed stop 601 and the inner moving stop 305 are simultaneously clamped between the two spring legs 306 of the inner torsion spring, so that the inner handle assembly 30 can be subjected to the elastic force of the inner torsion spring 304 when rotating in the first direction or the second direction. In addition, the inner handle assembly can be clamped by the two spring legs of the inner torsion spring at the same time, which makes the rotation of the inner handle assembly more stable and can accurately return to its original position after rotation, avoiding loosening.

[0118] like Figure 22 As shown, the inner handle assembly 30 is in the reset state, and the two spring legs 306 of the inner torsion spring simultaneously clamp the inner fixed stop block 601 and the inner moving stop block 305.

[0119] like Figure 23 As shown, after the inner handle assembly 30 rotates clockwise by a certain angle, the spring leg 306 of the inner torsion spring located at the top of the figure is driven upward by the inner moving block 305.

[0120] like Figure 24 As shown, after the inner handle assembly 30 rotates counterclockwise by a certain angle, the spring leg 306 of the inner torsion spring located at the bottom of the figure is driven to deflect downward by the inner moving block 305.

[0121] The knob assembly 402 has a central hole 402, and the inner end 203 of the safety rod has a square cross-section that is inserted into the central hole 402, thereby causing the safety rod 70 to rotate when the knob assembly 40 is rotated. This technical solution is reasonably designed to facilitate the assembly of the safety rod and the knob assembly. In this embodiment, the central hole 402 is a flat rectangle, and the inner end 203 of the safety rod is flat, that is, the cross-section of the inner end 203 of the safety rod is also a flat rectangle.

[0122] In this embodiment, the inner handle assembly 30 includes an inner handle 307, an inner cylinder 308, and an inner rotating frame 309; an inner groove 302 is provided on the peripheral wall of the inner cylinder 308, and an inner spring 303 and an inner cylindrical cam 50 are both installed in the inner cylinder 308; the outer end of the inner cylinder 308 is inserted into the inner handle 307, and the inner cylinder 308 and the inner handle 307 are fixedly assembled; the inner end of the inner cylinder 308 passes through the inner handle seat 60, and the inner handle assembly 30 is rotatably mounted on the inner handle seat 60 by means of the inner cylinder 308; the inner handle seat 60 is provided with a sleeve for the inner cylinder 308. The inner support cylinder 602 is external, the inner torsion spring 304 is sleeved on the outer side of the inner support cylinder 602, the inner rotating frame 309 is fixedly installed on the inner end of the inner cylinder 308, the inner moving block 305 and the inner square hole 301 are both provided on the inner rotating frame 309; the inner push rod 401 of the knob assembly 40 is inserted into the inner cylinder 308, and the knob assembly 40 also includes a knob bracket 403 inserted into the inner cylinder 308, the square hole 402 is provided on the knob bracket 403, and the inner end 203 of the safety rod passes through the inner square hole 301 and is inserted into the square hole 402 of the knob bracket in the inner cylinder;

[0123] There are two external push rods 702, which are symmetrically distributed on both sides of the bumper 70. An external unlocking and parking section 804, an external thrust section 803, and an external locking and parking section 805 connected in sequence form a set of external curve contour units. The external cylindrical cam 80 is provided with two sets of external curve contour units. Each external push rod 702 abuts against a set of external curve contour units. This technical solution is reasonably designed and can make the bumper and the external cylindrical cam bear forces evenly and operate smoothly.

Claims

1. A lever lock with an escape function, comprising an outer lever assembly, a square bar, and an inner lever assembly; The outer handle assembly includes an outer handle assembly and an outer handle seat for fixed installation on the outside of the door panel. The outer handle assembly is rotatably installed on the outer handle seat and has an outer square hole for inserting a square rod. The inner handle assembly includes an inner handle assembly, a knob assembly, an inner cylindrical cam, and an inner handle seat for fixed mounting on the inside of the door panel. The inner handle assembly is rotatably mounted on the inner handle seat and has an inner square hole for inserting a square rod. The inner cylindrical cam is fixed relative to the inner handle assembly in the circumferential direction and slidably mounted in the inner handle assembly relative to the inner handle assembly in the axial direction; The knob assembly is rotatably mounted in the inner handle assembly between a locked position and an unlocked position, and the direction in which the knob assembly rotates from the unlocked position to the locked position is the first direction, and the direction in which it rotates from the locked position to the unlocked position is the second direction. The end face of the inner cylindrical cam is provided with an inner curved profile. The knob assembly has an inner push rod that abuts against the inner curved profile of the inner cylindrical cam. The inner handle assembly is provided with an inner spring that keeps the inner curved profile of the inner cylindrical cam in contact with the inner push rod. When the knob assembly is rotated, the inner cylindrical cam is forced to slide along its axial direction through the inner push rod. The square rod spans between the outer handle assembly and the inner handle assembly, with one end of the square rod inserted into the outer square hole and the other end of the square rod inserted into the inner square hole; The axis of the inner cylindrical cam is parallel to the length of the square rod. The inner handle assembly has an inner groove extending along the axis of the inner cylindrical cam, and the inner cylindrical cam has an inner guide key that slides into the inner groove. Its features are: The outer handle assembly also includes a bumper and an outer cylindrical cam. The outer cylindrical cam is fixed relative to the outer handle assembly in the circumferential direction and is slidably mounted in the outer handle assembly relative to the outer handle assembly in the axial direction. The end face of the outer cylindrical cam has an outer curved profile. The square rod is hollow; The safety bar is rotatably mounted in the outer handle assembly, and the outer end of the safety bar in the outer handle assembly is provided with an outer push rod that abuts against the outer curved profile of the outer cylindrical cam. The outer handle assembly is provided with an outer spring that keeps the curved profile of the outer cylindrical cam in contact with the outer push rod. When the safety bar rotates, the outer cylindrical cam is forced to slide along its axial direction by the outer push rod. A clutch structure is provided between the outer cylindrical cam and the outer handle seat; The clutch structure has an engaged state that restricts the rotation of the outer cylindrical cam relative to the outer handle seat and a disengaged state that allows the outer cylindrical cam to rotate relative to the outer handle seat, and the engaged and disengaged states of the clutch structure switch when the outer cylindrical cam slides. The inner end of the safety bar passes through the square rod and is inserted into the knob assembly, so that when the knob assembly rotates, it drives the safety bar to rotate. The clutch mechanism switches from a disengaged state to an engaged state when the knob assembly is rotated in the first direction. The clutch mechanism switches from an engaged state to a disengaged state when the knob assembly is rotated in the second direction. The inner curve profile of the inner cylindrical cam includes an inner thrust section that extends spirally around the axis of the inner cylindrical cam, an inner unlocking and parking section connected to the bottom end of the inner thrust section, and an inner locking and parking section connected to the top end of the inner thrust section. The inner unlocking and inner locking parking sections are configured to allow the inner push rod to stop; When the inner push rod is in the inner unlocking parking section, the knob assembly is in the unlocked position; When the inner push rod is in the inner locked parking section, the knob assembly is in the locked position; The first end of the internal locking parking section is connected to the internal thrust section; The end face of the inner cylindrical cam is also provided with a blocking part located at the end of the inner locking and parking section to block the inner push rod; When the inner push rod, which is in the inner locking parking section, rotates from the inner locking parking section through the inner thrust section to the inner unlocking parking section in the first direction, it drives the knob assembly to rotate in the second direction. When the inner push rod, which is in the inner locking parking section, is pushed by the blocking part when the inner handle assembly rotates in the second direction, it causes the knob assembly to rotate in the second direction.

2. The lever lock with escape function according to claim 1, characterized in that: When the bumper rotates, it pushes the outer cylindrical cam to slide between an engaged position and a disengaged position, wherein... When the knob assembly reaches the unlock position, the outer cylindrical cam is in the disengaged position, and the clutch mechanism is in the disengaged state. When the knob assembly reaches the locked position, the outer cylindrical cam is in the engaged position, and the clutch mechanism is in the engaged state.

3. The lever lock with escape function according to claim 2, characterized in that: The clutch structure includes a recess on the outer handle seat and a protrusion on the outer cylindrical cam; When the outer cylindrical cam is in the engaged position, the convex part is inserted into the concave part so that the outer cylindrical cam is fixed relative to the outer handle seat in the circumferential direction. When the outer cylindrical cam is in the disengaged position, the convex portion moves away from the concave portion to allow the outer cylindrical cam to rotate relative to the outer handle seat in the circumferential direction.

4. The lever lock with escape function according to claim 3, characterized in that: The outer handle seat is provided with an outer central hole through which the outer cylindrical cam passes, and the recess is a notch provided on the wall of the outer central hole; The protrusion is a radial tooth provided on the circumferential sidewall of the outer cylindrical cam.

5. The lever lock with escape function according to claim 1, characterized in that: The inner cylindrical cam has an end face with an inner curved profile that faces the knob assembly, and the inner locking stop section is closer to the knob assembly than the inner unlocking stop section.

6. The lever lock with escape function according to claim 5, characterized in that: The outer curve profile of the outer cylindrical cam includes an outer thrust section that extends spirally around the axis of the outer cylindrical cam, an outer unlocking and parking section connected to the bottom end of the outer thrust section, and an outer locking and parking section connected to the top end of the outer thrust section. The end of the external locking and parking section that connects to the top of the external thrust section is the first end, while the other end of the external locking and parking section that is away from the top of the external thrust section is the second end. The external locking parking section is inclined, with the first end being closer to the knob assembly than the second end, making the first end higher than the second end; The outer cylindrical cam has an end face with an outer curved profile that also faces the knob assembly, and the outer locking parking section is also closer to the knob assembly than the outer unlocking parking section.

7. The lever lock with escape function according to claim 1, characterized in that: The outer handle assembly is equipped with a lock cylinder, and the outer end of the safety bar is inserted into the lock cylinder. The lock cylinder can rotate the safety bar after a key is inserted. One end of the inner spring rests against the inner handle assembly, and the other end rests against the inner cylindrical cam; The cross-sections of the outer square hole, the inner square hole, and the square rod are all square, and the side lengths of the outer square hole and the inner square hole are both greater than the side length of the square rod. The axis of the inner cylindrical cam is parallel to the length of the square rod, and the axis of the outer cylindrical cam coincides with the axis of the inner cylindrical cam.

8. The lever lock with escape function according to any one of claims 1 to 7, characterized in that: The external handle assembly also includes an external torsion spring for resetting the external handle assembly after it has rotated; The outer handle base is provided with an outer fixed stop block, the outer handle assembly is provided with an outer movable stop block, the outer torsion spring is installed on the outer handle base, and the outer fixed stop block and the outer movable stop block are simultaneously clamped between the two spring legs of the outer torsion spring so that the outer handle assembly can be subjected to the elastic force of the outer torsion spring when it rotates in the first direction or the second direction. The inner handle assembly also includes an inner torsion spring for resetting the inner handle assembly after rotation; The inner handle base is provided with an inner fixed stop block, the inner handle assembly is provided with an inner moving stop block, the inner torsion spring is installed on the inner handle base, and the inner fixed stop block and the inner moving stop block are simultaneously clamped between the two spring legs of the inner torsion spring so that the inner handle assembly can be subjected to the elastic force of the inner torsion spring when it rotates in the first direction or the second direction.

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